Monthly Report: Surveillance Project SB4008 IFNg (TC0651 and TC0751) & Antibody (TC0077) tests for bovine tuberculosis-December 2023
Source: environment.data.gov.uk (2024-07-03)

Interferon-Gamma Testing for Bovine Tuberculosis - Monthly Reports from January 2023. These monthly reports summarise the gamma tests completed / reported during that calendar month. The report also summarises tests for the whole calendar year to the end of the current month. While all effort is made to ensure the accuracy of the test data, small errors can occur and later corrected in subsequent reports.

Tests are listed by country (England, Wales, Scotland) and by Animal Health Office (AHDO) and the reason for the test. Reports contain test data for the month, the calendar year to date and total tests since rollout (23rd Oct 2006).

Please note: this dataset consists of 12 monthly reports. Data for this report was compiled from field staff inputs and laboratory test information. Subsequent minor data amendments may have been made after the report was originally compiled, and these corrections would appear in the following month’s report. Each report was checked and deemed correct at the time of release

Monthly Report:
Surveillance Project
SB4008 IFNg (TC0651 and
TC0751) & Antibody
(TC0077) tests for bovine
tuberculosis
Number
Report Period 1st - 31st December2023
Issued 10 January 2024
208

Operational notes on terminology, definitions, re-test and re-samples test
outcomes:
• “Samples” refers to an individual tube of blood taken from an individual animal which is
subsequently submitted for testing. It is generally assumed that the number of samples and
the number of animals are analogous as any duplicate sample blood tube from the same
animal will not be tested. However, minor discrepancies may occur where the same animal is
tested more than once due to a request for a resample or the animal is tested twice under
different categories (for example, as a PAR-RAPID and then as part of a PAR-HERD-S).
• “Submissions” refers to an individual batch or set of samples received for testing.
Submissions may comprise 1 or more samples (for example, if an entire herd is being tested it
is usually sent as 1 submission). It is generally assumed that the number of submissions and
the number of herds are analogous.
• Retests are samples where the first ELISA assay fails and the same sample is retested on a
new ELISA plate. Each sample can be retested only once. A retest is not a reportable test
outcome.
• Resamples are where a sample has been retested and failed a second time, so that the lab
requests a new sample. This is a reportable test outcome.
• Rejects are samples that are not tested by the lab for one of the following reasons: blood
collected into wrong type of vacutainer, samples that have not been maintained at the
appropriate temperature range (22±5C), unlabelled samples, broken or cracked tubes, blood
that is extensively clotted (small clots are OK), samples received after 4pm on the day after
sample collection. Such samples are reported separately in the tables and in figure 5.
• POS (pokeweed mitogen) is a sample positive control reagent which provides a measure of
the quality/viability of the blood sample. A POS fail (< 0.45 optical density reading) may
indicate compromised blood quality as a result of collection/transportation conditions or due
the animal having an unusually low/suppressed cellular immune response.
• NEG (no-antigen control) is a sample negative control which provides a measure of the
background antigen-independent IFN- responses. A NEG fail (> 0.3 optical density reading)
may indicate a laboratory procedures problem (normally resolved during re-test) or that an
animal has unusually high background levels of IFN-g.

1. Interferon-gamma test:
Submission Reason
Explanation
Mandatory?
Possible Herd Slaughter
(PAR-HERD-S)
Parallel interferon-gamma (IFNG) blood testing
of skin test negative cattle to inform whole or
partial herd slaughters decisions
YES, if APHA are
contemplating a herd
slaughter
Persistent TB breakdowns
(OTF status withdrawn)
(PAR-P-CONF) N.B.
PAR-PERSIS from 1st April
2017
Parallel blood IFNG testing of skin test-negative
cattle in persistently infected herds that have
failed to resolve by repeated short-interval skin
testing and fulfill a minimum of biosecurity
standards.
NO (APHA discretion)
Parallel - Low Incidence
(PAR-LOW-IN) N.B.
PAR-NEW-IN from 1st April
2017
Parallel blood IFNG testing to maximise the
probability of removing all infected cattle in a
new herd breakdown as soon as possible after
confirmation of TB.
YES in Area of Low
Incidence
PAR-RAPID
Parallel blood testing of two-times IRs identified
under the severe interpretation of the skin test
used in Wales.
YES (Wales only)
PAR-IR-SEV
Parallel blood testing of all severe IRs identified
in persistent breakdown herds only (coupled
with Idexx antibody testing)
YES (Wales only)
PAR-IR-EX
Parallel IFNG blood testing of all severe IRs in
the Exit Strategy for persistent herds (coupled
with Idexx antibody testing),
and also for new breakdown herds in ITBAN
(Intermediate TB Area North) (not coupled with
IDEXX testing).
YES (Wales only)
PAR-CUL-N
Parallel IFNG blood testing to maximise the
probability of removing all infected cattle in a
new breakdown as soon as possible after
confirmation of TB where herd is situated in
badger control areas of England that have
completed at least 2 effective culls.
YES (in eligible badger
control areas of England)
PAR-CUL-P
Parallel IFNG blood testing to maximise the
probability of removing all infected cattle in a
persistent confirmed breakdown where herd is
situated within badger control areas of England
that have completed at least 2 effective culls
NO (APHA discretion in
badger control areas
England)
PAR-RECUR
England - parallel IFNG blood testing of skin
test-negative cattle in breakdown herds (in HRA
& 6-monthly-testing parts of Edge Area)
occurring within 18 months of lifting restrictions
after a previous breakdown
Wales - parallel IFNG blood testing of skin
test-negative cattle in breakdown herds
occurring within 6 months of lifting restrictions
after a previous breakdown
England - YES
Wales - NO (APHA
discretion)
PAR-CHR
Parallel IFNG blood testing of Chronic
breakdown herds i.e. where VL reactors are
disclosed at a 3rd or subsequent Short Interval
test or a SLH case after a 2nd or subsequent
Short Interval test
England only - YES
PAR-POSTM
Post movement IFNG blood test of cattle
(coupled with Idexx antibody testing)
Yes (currently Wales
ITBAN only)
PAR-OTHER
Other parallel IFNG blood testing not covered in
any of the other scenarios
NO (APHA discretion)
Test Criteria

'NSR' Herds (SER-NSR)
Modified serial IFNG blood testing of individual
skin test reactors and/or IRs in unconfirmed TB
breakdown herds to clarify their infection status
where there is evidence of non-specific
sensitisation to bovine tuberculin (the
“non-specific reactor” procedure)
NO (APHA discretion)
Suspected Fraud
(SER-FRAUD)
Modified serial IFNG blood test of suspected
fraudulent reactors to the skin test (animals with
abnormal skin swellings), in confirmed or
unconfirmed TB incidents.
NO (APHA discretion to
firm up or rule out any
suspicion of fraud and
support any
investigations)
Anomalous reaction
(SER-ANOM)
Modified serial IFNG blood test of suspected
fraudulent reactors to the skin test (animals with
abnormal skin swellings), in confirmed or
unconfirmed TB incidents.
NO (APHA discretion to
firm up or rule out any
suspicion of fraud and
support any
investigations)
Serial Other
(SER-OTHER)
Serial test – other reasons
NO (APHA Discretion)
SER-FLEXI
Extended IFNG blood test to provide flexible
test readout in a confirmed M. bovis-infected
herd where Johne's (M. a. paratuberculosis)
infection or vaccination is suspected to be
interferring with M. bovis infection detection
NO (APHA discretion)
2. IDEXX antibody test:
Submission Reason
Explanation
Mandatory?
BOV-P
Supplementary antibody testing within
persistent infected herds
NO (APHA discretion -
Eng & Wales)
BOV-OTHER
Antibody testing for reasons not covered by the
above
NO (APHA discretion -
Eng & Wales)
BOV-IR-EX
Compulsory antibody testing of IRs as part of
Exit Strategy (coupled with IFNG testing)
YES (Wales only)
BOV-IR-C
Compulsory antibody testing of severe IRs
(coupled IFNG testing)
YES (Wales only)
BOV-POSTM
Compulsory post-movement antibody test of
cattle (coupled with IFNG testing)
YES (Wales only)

Num
samples
December
2023
%
Total 2023
%
Submissions
183
2780
Samples
Total (%)
14037
100.00 %
219841
100.00 %
England
9342
66.55 %
144258
65.62 %
Wales
4395
31.31 %
63801
29.02 %
Scotland
300
2.14 %
11782
5.36 %
Parallel Tests
PAR-CHR
131
0.93 %
3412
1.55 %
PAR-CUL-N
0
0.00 %
6262
2.85 %
PAR-CUL-P
665
4.74 %
1430
0.65 %
PAR-HERD-S
0
0.00 %
461
0.21 %
PAR-IR-EX
31
0.22 %
604
0.27 %
PAR-IR-SEV
249
1.77 %
3085
1.40 %
PAR-NEW-IN
3219
22.93 %
65904
29.98 %
PAR-OTHER
272
1.94 %
5768
2.62 %
PAR-PERSIS
2076
14.79 %
26492
12.05 %
PAR-POSTM
0
0.00 %
94
0.04 %
PAR-RAPID
59
0.42 %
878
0.40 %
PAR-RECUR
7176
51.12 %
94254
42.87 %
Total(% of all samples)
13878
98.87 %
208644
94.91 %
Serial/Extended Tests
SER-ANOM
0
0.00 %
17
0.01 %
SER-FLEXI
157
1.12 %
11127
5.06 %
SER-FRAUD
0
0.00 %
14
0.01 %
SER-NSR
0
0.00 %
SER-OTHER
2
0.01 %
39
0.02 %
Total(% of all samples)
159
1.13 %
11197
5.09 %
Total
14037
100.00 %
219841
100.00 %
Retests
Total (% of all samples)
785
5.59 %
14481
6.59 %
England
463
3.30 %
8923
4.06 %
Wales
288
2.05 %
4565
2.08 %
Scotland
34
0.24 %
993
0.45 %
Resamples
Total (% of all samples)
653
4.65 %
11539
5.25 %
England
378
2.69 %
7184
3.27 %
Wales
248
1.77 %
3488
1.59 %
Scotland
27
0.19 %
867
0.39 %
Rejects
Total (% of all samples)
172
1.23 %
2455
1.12 %
England
63
0.45 %
xx-xxxx-xxxx
0.77 %
Wales
109
0.78 %
689
0.31 %
Scotland
0
0.00 %
79
0.04 %
Table 1. Monthly Totals for December 2023
PAR-HERD-S: potential herd slaughter, PAR-P-CONF (PAR-PERSIS from 1 April 2017): persistent TB breakdown OTFW, PAR-LOW-IN
(PAR-NEW-IN from 1 April 2017): parallel low incidence, PAR-RAPID: rapid testing of twice IRs, PAR-CUL-N: new infection in cull area,
PAR-CUL-P: persistent infection in cull area, PAR-OTHER: parallel other, SER-FLEXI: flexible extended test in confirmed herds with
concurrent Johne’s infection/vaccination, SER-NSR: serial non-specific reactor, SER-FRAUD: serial potential fraud, SER-OTHER: serial
other

PAR-CHR
PAR-CUL-P
PAR-IR-EX
PAR-IR-SEV
PAR-NEW-IN
PAR-OTHER
PAR-PERSIS
PAR-RAPID
PAR-RECUR
SER-FLEXI
SER-OTHER
Breakdown of
Reason for
submission
PAR-CHR
131
0.9 %
PAR-CUL-P
665
4.7 %
PAR-IR-EX
31
0.2 %
PAR-IR-SEV
249
1.8 %
PAR-NEW-IN
3219
22.9 %
PAR-OTHER
272
1.9 %
PAR-PERSIS
2076
14.8 %
PAR-RAPID
59
0.4 %
PAR-RECUR
7176
51.1 %
SER-FLEXI
157
1.1 %
SER-OTHER
2
0.0 %
Total
14037
100.00 %
Figure 1. Number of samples submitted in each category during December 2023
PAR-HERD-S: potential herd slaughter, PAR-P-CONF (PAR-PERSIS from 1 April 2017): persistent TB breakdown OTFW, PAR-LOW-IN
(PAR-NEW-IN from 1 April 2017): parallel low incidence, PAR-RAPID: rapid testing of twice IRs, PAR-CUL-N: new infection in cull area,
PAR-CUL-P: persistent infection in cull area, PAR-OTHER: parallel other, SER-FLEXI: flexible extended test in confirmed herds with
concurrent Johne’s infection/vaccination, SER-NSR: serial non-specific reactor, SER-FRAUD: serial potential fraud, SER-OTHER: serial
other, PAR-CHR: chronic breakdown herds - where VL reactors are disclosed at a 3rd or subsequent SI test, or SLH case after a 2nd or
subsequent SI test

0
500
1000
1500
2000
2500
3000
West lothian
Powys
Pembs
NE Wales
Gwynedd
Gwent
Ceredigion
Carms
W Sussex
W Midlands
Wiltshire
Staffs
Somerset excl N
Shropshire
Oxon
Northants
Norfolk
Leics & Rut
Heref
Gloucs
E Sussex
Devon
Derbyshire
Cumbria
Corn & Scilly
Cheshire
Bucks
Scotland
Wales
England
SER-OTHER
SER-FLEXI
PAR-RECUR
PAR-RAPID
PAR-PERSIS
PAR-OTHER
PAR-NEW-IN
PAR-IR-SEV
PAR-IR-EX
PAR-CUL-P
PAR-CHR
Breakdown of
Samples
submitted by
County
Figure 2. Number of samples submitted in each category by County during December 2023
PAR-HERD-S: potential herd slaughter, PAR-P-CONF (PAR-PERSIS from 1 April 2017): persistent TB breakdown OTFW, PAR-LOW-IN (PAR-NEW-IN from 1 April 2017): parallel low incidence,
PAR-RAPID: rapid testing of twice IRs, PAR-CUL-N: new infection in cull area, PAR-CUL-P: persistent infection in cull area, PAR-OTHER: parallel other, SER-FLEXI: flexible extended test in
confirmed herds with concurrent Johne’s infection/vaccination, SER-NSR: serial non-specific reactor, SER-FRAUD: serial potential fraud, SER-OTHER: serial other, PAR-CHR: chronic breakdown
herds - where VL reactors are disclosed at a 3rd or subsequent SI test, or SLH case after a 2nd or subsequent SI test

0
5000
10000
15000
20000
25000
30000
Wigtown
West lothian
Roxburgh
Renfrew
Perthshire
Kirkcudbright
Ayrshire
Argyll & Bute
W Glamorgan
S Wales
Shropshire
S Glamorgan
Powys
Pembs
NW Wales
NE Wales
Monmouthshire and newport
Mid Glamorgan
Gwynedd
Gwent
Conwy
Cheshire
Ceredigion
Carms
W Yorks
W Sussex
Worcs
W Midlands
Wiltshire
Warks
Surrey
Staffs
Somerset excl N
Shropshire
Oxon
N Yorks
N Somer S Glos
Notts
Northumb
Northants
Norfolk
Lincs
Leics & Rut
Lancashire
Humberside
Herts
Heref
Hampshire
Gr Manchester
Gloucs
E Sussex
Essex
Dorset
Devon
Derbyshire
Cumbria
Corn & Scilly
Cheshire
Bucks
Berks
Beds
Avon
land
Wales
land
SER-OTHER
SER-FRAUD
SER-FLEXI
SER-ANOM
PAR-RECUR
PAR-RAPID
PAR-POSTM
PAR-PERSIS
PAR-OTHER
PAR-NEW-IN
PAR-IR-SEV
PAR-IR-EX
PAR-HERD-S
PAR-CUL-P
PAR-CUL-N
PAR-CHR
Breakdown
of Samples
submitted
by County
Figure 3. Number of samples submitted in each category by County during 2023
PAR-HERD-S: potential herd slaughter, PAR-P-CONF (PAR-PERSIS from 1 April 2017): persistent TB breakdown OTFW, PAR-LOW-IN (PAR-NEW-IN from 1 April 2017):
parallel low incidence, PAR-RAPID: rapid testing of twice IRs, PAR-CUL-N: new infection in cull area, PAR-CUL-P: persistent infection in cull area, PAR-OTHER:
parallel other, SER-FLEXI: flexible extended test in confirmed herds with concurrent Johne’s infection/vaccination, SER-NSR: serial non-specific reactor,
SER-FRAUD: serial potential fraud, SER-OTHER: serial other, PAR-CHR: chronic breakdown herds - where VL reactors are disclosed at a 3rd or subsequent SI test, or
SLH case after a 2nd or subsequent SI test

Country
County
Submission
Reasons*
No.
subs
Samples
Gamma Positive
Gamma Negatives
Retest*
Resample
Reject
n
% of total
n
%
n
%
n
%
England - HRA
Corn & Scilly
PAR-PERSIS
1
59
0.42 %
11
18.64 %
44
74.58 %
4
6.78 %
4
6.78 %
0
0.00 %
PAR-RECUR
5
932
6.64 %
42
4.51 %
866
92.92 %
27
2.90 %
22
2.36 %
2
0.21 %
Devon
PAR-CUL-P
2
665
4.74 %
107
16.09 %
545
81.95 %
18
2.71 %
13
1.95 %
0
0.00 %
PAR-PERSIS
1
4
0.03 %
0
0.00 %
3
75.00 %
1
25.00 %
1
25.00 %
0
0.00 %
PAR-RECUR
9
1,936
13.79 %
125
6.46 %
1748
90.29 %
80
4.13 %
63
3.25 %
0
0.00 %
Gloucs
PAR-OTHER
1
1
0.01 %
0
0.00 %
1
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-PERSIS
2
21
0.15 %
1
4.76 %
17
80.95 %
5
23.81 %
3
14.29 %
0
0.00 %
PAR-RECUR
1
4
0.03 %
2
50.00 %
1
25.00 %
1
25.00 %
1
25.00 %
0
0.00 %
Heref
PAR-RECUR
5
352
2.51 %
7
1.99 %
327
92.90 %
22
6.25 %
18
5.11 %
0
0.00 %
Shropshire
PAR-RECUR
3
418
2.98 %
6
1.44 %
400
95.69 %
14
3.35 %
12
2.87 %
0
0.00 %
Somerset excl N
PAR-CHR
3
124
0.88 %
6
4.84 %
106
85.48 %
11
8.87 %
11
8.87 %
1
0.81 %
Staffs
PAR-RECUR
3
91
0.65 %
0
0.00 %
85
93.41 %
10
10.99 %
6
6.59 %
0
0.00 %
Wiltshire
PAR-RECUR
4
680
4.84 %
48
7.06 %
608
89.41 %
31
4.56 %
24
3.53 %
0
0.00 %
W Midlands
PAR-CHR
1
7
0.05 %
0
0.00 %
2
28.57 %
5
71.43 %
5
71.43 %
0
0.00 %
England - Edge
Bucks
PAR-RECUR
4
320
2.28 %
3
0.94 %
297
92.81 %
21
6.56 %
20
6.25 %
0
0.00 %
Cheshire
PAR-PERSIS
5
295
2.10 %
8
2.71 %
259
87.80 %
30
10.17 %
28
9.49 %
0
0.00 %
PAR-RECUR
1
326
2.32 %
47
14.42 %
257
78.83 %
29
8.90 %
22
6.75 %
0
0.00 %
Derbyshire
PAR-RECUR
2
804
5.73 %
10
1.24 %
776
96.52 %
23
2.86 %
18
2.24 %
0
0.00 %
E Sussex
SER-OTHER
1
2
0.01 %
0
0.00 %
0
0.00 %
2
100.00 %
2
100.00 %
0
0.00 %
Leics & Rut
PAR-NEW-IN
4
591
4.21 %
11
1.86 %
558
94.42 %
28
4.74 %
21
3.55 %
1
0.17 %
Northants
PAR-NEW-IN
3
86
0.61 %
10
11.63 %
74
86.05 %
2
2.33 %
2
2.33 %
0
0.00 %
Oxon
PAR-RECUR
4
811
5.78 %
22
2.71 %
762
93.96 %
37
4.56 %
27
3.33 %
0
0.00 %
England - LRA
Cumbria
PAR-NEW-IN
1
327
2.33 %
13
3.98 %
291
88.99 %
23
7.03 %
23
7.03 %
0
0.00 %
Norfolk
PAR-NEW-IN
3
384
2.74 %
16
4.17 %
283
73.70 %
31
8.07 %
26
6.77 %
59
15.36 %
W Sussex
PAR-NEW-IN
1
102
0.73 %
1
0.98 %
95
93.14 %
8
7.84 %
6
5.88 %
0
0.00 %
England
70
9342
66.55 %
496
5.31 %
8405
89.97 %
463
4.96 %
378
4.05 %
63
0.67 %
Table 2a. Summary by County for December 2023
PAR-HERD-S: potential herd slaughter, PAR-P-CONF (PAR-PERSIS from 1 April 2017): persistent TB breakdown OTFW, PAR-LOW-IN (PAR-NEW-IN from 1 April 2017): parallel low incidence, PAR-RAPID: rapid testing of twice IRs, PAR-CUL-N:
new infection in cull area, PAR-CUL-P: persistent infection in cull area, PAR-OTHER: parallel other, SER-FLEXI: flexible extended test in confirmed herds with concurrent Johne’s infection/vaccination, SER-NSR: serial non-specific reactor,
SER-FRAUD: serial potential fraud, SER-OTHER: serial other, PAR-CHR: chronic breakdown herds - where VL reactors are disclosed at a 3rd or subsequent SI test, or SLH case after a 2nd or subsequent SI test
* Sufficient plasma supernatant is collected and stored following the overnight culture stage of the assay such that if the sample fails any of the QC criteria, it is
possible for the laboratory to ‘re-test’ the original sample. Depending on the outcome of a retest, a resample (if QC criteria fail to be met), a positive or a negative
result will be reported. Therefore, the total number of samples = the sum of positive, negative, resample and reject samples only.

Table 2a. Summary by County for December 2023 Cont.
Country
County
Submission
Reasons*
No.
subs
Samples
Gamma Positive
Gamma Negatives
Retest*
Resample
Reject
n
% of total
n
%
n
%
n
%
Wales - High TB
Carms
PAR-IR-SEV
4
49
0.35 %
18
36.73 %
30
61.22 %
5
10.20 %
1
2.04 %
0
0.00 %
PAR-OTHER
1
47
0.33 %
17
36.17 %
30
63.83 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-PERSIS
4
38
0.27 %
4
10.53 %
23
60.53 %
11
28.95 %
11
28.95 %
0
0.00 %
PAR-RAPID
6
21
0.15 %
10
47.62 %
11
52.38 %
0
0.00 %
0
0.00 %
0
0.00 %
SER-FLEXI
3
142
1.01 %
18
12.68 %
114
80.28 %
10
7.04 %
9
6.34 %
1
0.70 %
Ceredigion
PAR-IR-SEV
1
4
0.03 %
0
0.00 %
4
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-PERSIS
5
423
3.01 %
49
11.58 %
365
86.29 %
11
2.60 %
9
2.13 %
0
0.00 %
Gwent
PAR-IR-SEV
2
13
0.09 %
7
53.85 %
6
46.15 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-PERSIS
2
229
1.63 %
11
4.80 %
213
93.01 %
8
3.49 %
4
1.75 %
1
0.44 %
PAR-RAPID
1
5
0.04 %
1
20.00 %
4
80.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-RECUR
2
3
0.02 %
0
0.00 %
2
66.67 %
1
33.33 %
1
33.33 %
0
0.00 %
Pembs
PAR-IR-EX
3
10
0.07 %
3
30.00 %
5
50.00 %
2
20.00 %
2
20.00 %
0
0.00 %
PAR-IR-SEV
16
141
1.00 %
58
41.13 %
80
56.74 %
5
3.55 %
3
2.13 %
0
0.00 %
PAR-OTHER
2
223
1.59 %
16
7.17 %
166
74.44 %
42
18.83 %
41
18.39 %
0
0.00 %
PAR-PERSIS
5
768
5.47 %
55
7.16 %
683
88.93 %
40
5.21 %
30
3.91 %
0
0.00 %
PAR-RAPID
8
23
0.16 %
6
26.09 %
17
73.91 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-RECUR
5
499
3.55 %
29
5.81 %
357
71.54 %
17
3.41 %
12
2.40 %
101
20.24 %
SER-FLEXI
2
7
0.05 %
0
0.00 %
7
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
Powys
PAR-IR-SEV
1
2
0.01 %
0
0.00 %
2
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-RAPID
2
3
0.02 %
1
33.33 %
2
66.67 %
0
0.00 %
0
0.00 %
0
0.00 %
SER-FLEXI
1
8
0.06 %
0
0.00 %
7
87.50 %
2
25.00 %
1
12.50 %
0
0.00 %
Wales - Intermediate TB
Carms
PAR-PERSIS
3
234
1.67 %
28
11.97 %
196
83.76 %
9
3.85 %
6
2.56 %
4
1.71 %
PAR-RAPID
1
7
0.05 %
1
14.29 %
4
57.14 %
2
28.57 %
2
28.57 %
0
0.00 %
Ceredigion
PAR-OTHER
1
1
0.01 %
0
0.00 %
1
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
NE Wales
PAR-IR-EX
3
8
0.06 %
3
37.50 %
4
50.00 %
1
12.50 %
1
12.50 %
0
0.00 %
PAR-IR-SEV
1
38
0.27 %
4
10.53 %
34
89.47 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-NEW-IN
9
532
3.79 %
13
2.44 %
474
89.10 %
46
8.65 %
44
8.27 %
1
0.19 %
PAR-PERSIS
1
5
0.04 %
0
0.00 %
5
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-HERD-S: potential herd slaughter, PAR-P-CONF (PAR-PERSIS from 1 April 2017): persistent TB breakdown OTFW, PAR-LOW-IN (PAR-NEW-IN from 1 April 2017): parallel low incidence, PAR-RAPID: rapid testing of twice IRs, PAR-CUL-N:
new infection in cull area, PAR-CUL-P: persistent infection in cull area, PAR-OTHER: parallel other, SER-FLEXI: flexible extended test in confirmed herds with concurrent Johne’s infection/vaccination, SER-NSR: serial non-specific reactor,
SER-FRAUD: serial potential fraud, SER-OTHER: serial other, PAR-CHR: chronic breakdown herds - where VL reactors are disclosed at a 3rd or subsequent SI test, or SLH case after a 2nd or subsequent SI test
* Sufficient plasma supernatant is collected and stored following the overnight culture stage of the assay such that if the sample fails any of the QC criteria, it is
possible for the laboratory to ‘re-test’ the original sample. Depending on the outcome of a retest, a resample (if QC criteria fail to be met), a positive or a negative
result will be reported. Therefore, the total number of samples = the sum of positive, negative, resample and reject samples only.

Table 2a. Summary by County for December 2023 Cont.
Country
County
Submission
Reasons*
No.
subs
Samples
Gamma Positive
Gamma Negatives
Retest*
Resample
Reject
n
% of total
n
%
n
%
n
%
Powys
PAR-NEW-IN
3
521
3.71 %
19
3.65 %
455
87.33 %
47
9.02 %
46
8.83 %
1
0.19 %
Wales - Low TB
Gwynedd
PAR-IR-SEV
1
2
0.01 %
0
0.00 %
2
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-NEW-IN
4
11
0.08 %
0
0.00 %
9
81.82 %
2
18.18 %
2
18.18 %
0
0.00 %
NE Wales
PAR-IR-EX
2
13
0.09 %
6
46.15 %
7
53.85 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-NEW-IN
5
365
2.60 %
12
3.29 %
330
90.41 %
27
7.40 %
23
6.30 %
0
0.00 %
Wales
110
4395
31.31 %
389
8.85 %
3649
83.03 %
288
6.55 %
248
5.64 %
109
2.48 %
Scotland - Scotland
West lothian
PAR-NEW-IN
3
300
2.14 %
7
2.33 %
266
88.67 %
34
11.33 %
27
9.00 %
0
0.00 %
Scotland
3
300
2.14 %
7
2.33 %
266
88.67 %
34
11.33 %
27
9.00 %
0
0.00 %
Grand Total
Sum:
183
14037
892
12320
785
653
172
*For test criteria please refer to Operational notes.
PAR-HERD-S: potential herd slaughter, PAR-P-CONF (PAR-PERSIS from 1 April 2017): persistent TB breakdown OTFW, PAR-LOW-IN (PAR-NEW-IN from 1 April 2017): parallel low incidence, PAR-RAPID: rapid testing of twice IRs, PAR-CUL-N:
new infection in cull area, PAR-CUL-P: persistent infection in cull area, PAR-OTHER: parallel other, SER-FLEXI: flexible extended test in confirmed herds with concurrent Johne’s infection/vaccination, SER-NSR: serial non-specific reactor,
SER-FRAUD: serial potential fraud, SER-OTHER: serial other, PAR-CHR: chronic breakdown herds - where VL reactors are disclosed at a 3rd or subsequent SI test, or SLH case after a 2nd or subsequent SI test
* Sufficient plasma supernatant is collected and stored following the overnight culture stage of the assay such that if the sample fails any of the QC criteria, it is
possible for the laboratory to ‘re-test’ the original sample. Depending on the outcome of a retest, a resample (if QC criteria fail to be met), a positive or a negative
result will be reported. Therefore, the total number of samples = the sum of positive, negative, resample and reject samples only.

Country
County
Submission
Reasons*
No.
subs
Samples
Gamma Positive
Gamma Negatives
Retest*
Resample
Reject
n
% of total
n
%
n
%
n
%
England - HRA
PAR-RECUR
1
51
0.02 %
1
1.96 %
49
96.08 %
2
3.92 %
1
1.96 %
0
0.00 %
Avon
PAR-RECUR
34
3,699
1.68 %
146
3.95 %
3419
92.43 %
161
4.35 %
128
3.46 %
6
0.16 %
Corn & Scilly
PAR-CUL-N
3
926
0.42 %
60
6.48 %
804
86.83 %
80
8.64 %
62
6.70 %
0
0.00 %
PAR-CUL-P
1
539
0.25 %
31
5.75 %
481
89.24 %
32
5.94 %
26
4.82 %
1
0.19 %
PAR-HERD-S
1
61
0.03 %
1
1.64 %
59
96.72 %
4
6.56 %
1
1.64 %
0
0.00 %
PAR-OTHER
4
349
0.16 %
28
8.02 %
289
82.81 %
36
10.32 %
32
9.17 %
0
0.00 %
PAR-PERSIS
10
1,820
0.83 %
268
14.73 %
1436
78.90 %
133
7.31 %
116
6.37 %
0
0.00 %
PAR-RECUR
73
13,492
6.14 %
503
3.73 %
12169
90.19 %
978
7.25 %
815
6.04 %
5
0.04 %
Devon
PAR-CHR
4
525
0.24 %
17
3.24 %
481
91.62 %
43
8.19 %
27
5.14 %
0
0.00 %
PAR-CUL-N
23
3,212
1.46 %
123
3.83 %
2943
91.63 %
164
5.11 %
133
4.14 %
13
0.40 %
PAR-CUL-P
2
665
0.30 %
107
16.09 %
545
81.95 %
18
2.71 %
13
1.95 %
0
0.00 %
PAR-HERD-S
2
396
0.18 %
35
8.84 %
326
82.32 %
48
12.12 %
35
8.84 %
0
0.00 %
PAR-NEW-IN
1
188
0.09 %
18
9.57 %
165
87.77 %
9
4.79 %
4
2.13 %
1
0.53 %
PAR-OTHER
15
1,470
0.67 %
91
6.19 %
1321
89.86 %
87
5.92 %
57
3.88 %
1
0.07 %
PAR-PERSIS
8
1,255
0.57 %
57
4.54 %
1163
92.67 %
51
4.06 %
35
2.79 %
0
0.00 %
PAR-RECUR
115
18,272
8.31 %
983
5.38 %
16192
88.62 %
1077
5.89 %
823
4.50 %
274
1.50 %
Dorset
PAR-OTHER
4
667
0.30 %
56
8.40 %
592
88.76 %
16
2.40 %
13
1.95 %
6
0.90 %
PAR-RECUR
16
2,719
1.24 %
191
7.02 %
2076
76.35 %
101
3.71 %
79
2.91 %
373
13.72 %
Gloucs
PAR-CUL-N
2
35
0.02 %
5
14.29 %
30
85.71 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-CUL-P
1
6
0.00 %
1
16.67 %
2
33.33 %
3
50.00 %
3
50.00 %
0
0.00 %
PAR-OTHER
2
33
0.02 %
1
3.03 %
31
93.94 %
1
3.03 %
1
3.03 %
0
0.00 %
PAR-PERSIS
5
1,046
0.48 %
49
4.68 %
873
83.46 %
33
3.15 %
24
2.29 %
100
9.56 %
PAR-RECUR
23
3,751
1.71 %
183
4.88 %
3418
91.12 %
179
4.77 %
149
3.97 %
1
0.03 %
Heref
PAR-OTHER
2
83
0.04 %
3
3.61 %
74
89.16 %
6
7.23 %
6
7.23 %
0
0.00 %
PAR-RECUR
55
8,658
3.94 %
422
4.87 %
7824
90.37 %
510
5.89 %
412
4.76 %
0
0.00 %
N Somer S Glos
PAR-RECUR
2
25
0.01 %
1
4.00 %
23
92.00 %
1
4.00 %
1
4.00 %
0
0.00 %
Table 2b. Summary by County for 2023
PAR-HERD-S: potential herd slaughter, PAR-P-CONF (PAR-PERSIS from 1 April 2017): persistent TB breakdown OTFW, PAR-LOW-IN (PAR-NEW-IN from 1 April 2017): parallel low incidence, PAR-RAPID: rapid testing of twice IRs, PAR-CUL-N: new
infection in cull area, PAR-CUL-P: persistent infection in cull area, PAR-OTHER: parallel other, SER-FLEXI: flexible extended test in confirmed herds with concurrent Johne’s infection/vaccination, SER-NSR: serial non-specific reactor,
SER-FRAUD: serial potential fraud, SER-OTHER: serial other, PAR-CHR: chronic breakdown herds - where VL reactors are disclosed at a 3rd or subsequent SI test, or SLH case after a 2nd or subsequent SI test
* Sufficient plasma supernatant is collected and stored following the overnight culture stage of the assay such that if the sample fails any of the QC criteria, it is
possible for the laboratory to ‘re-test’ the original sample. Depending on the outcome of a retest, a resample (if QC criteria fail to be met), a positive or a negative
result will be reported. Therefore, the total number of samples = the sum of positive, negative, resample and reject samples only.

Table 2b. Summary by County for 2023 Cont.
Country
County
Submission
Reasons*
No.
subs
Samples
Gamma Positive
Gamma Negatives
Retest*
Resample
Reject
n
% of total
n
%
n
%
n
%
Shropshire
PAR-CUL-P
1
220
0.10 %
4
1.82 %
202
91.82 %
22
10.00 %
14
6.36 %
0
0.00 %
PAR-OTHER
2
285
0.13 %
10
3.51 %
269
94.39 %
7
2.46 %
6
2.11 %
0
0.00 %
PAR-PERSIS
11
1,281
0.58 %
57
4.45 %
1178
91.96 %
67
5.23 %
46
3.59 %
0
0.00 %
PAR-RECUR
47
6,032
2.74 %
222
3.68 %
5486
90.95 %
405
6.71 %
321
5.32 %
3
0.05 %
Somerset excl N
PAR-CHR
10
616
0.28 %
48
7.79 %
528
85.71 %
49
7.95 %
39
6.33 %
1
0.16 %
PAR-OTHER
2
12
0.01 %
2
16.67 %
9
75.00 %
2
16.67 %
1
8.33 %
0
0.00 %
PAR-PERSIS
2
296
0.13 %
47
15.88 %
226
76.35 %
25
8.45 %
23
7.77 %
0
0.00 %
PAR-RECUR
46
6,541
2.98 %
332
5.08 %
6016
91.97 %
229
3.50 %
189
2.89 %
4
0.06 %
Staffs
PAR-CHR
7
1,562
0.71 %
57
3.65 %
1370
87.71 %
149
9.54 %
134
8.58 %
1
0.06 %
PAR-OTHER
3
81
0.04 %
4
4.94 %
72
88.89 %
5
6.17 %
5
6.17 %
0
0.00 %
PAR-PERSIS
1
235
0.11 %
5
2.13 %
208
88.51 %
23
9.79 %
22
9.36 %
0
0.00 %
PAR-RECUR
47
9,791
4.45 %
196
2.00 %
8941
91.32 %
763
7.79 %
624
6.37 %
30
0.31 %
Wiltshire
PAR-CUL-N
3
992
0.45 %
34
3.43 %
924
93.15 %
42
4.23 %
31
3.13 %
3
0.30 %
PAR-OTHER
2
221
0.10 %
5
2.26 %
181
81.90 %
43
19.46 %
34
15.38 %
1
0.45 %
PAR-PERSIS
7
1,297
0.59 %
24
1.85 %
1210
93.29 %
77
5.94 %
50
3.86 %
13
1.00 %
PAR-RECUR
37
5,722
2.60 %
221
3.86 %
5140
89.83 %
283
4.95 %
205
3.58 %
156
2.73 %
W Midlands
PAR-CHR
2
393
0.18 %
17
4.33 %
364
92.62 %
12
3.05 %
12
3.05 %
0
0.00 %
PAR-RECUR
1
144
0.07 %
0
0.00 %
137
95.14 %
17
11.81 %
7
4.86 %
0
0.00 %
Worcs
PAR-RECUR
2
94
0.04 %
6
6.38 %
84
89.36 %
4
4.26 %
4
4.26 %
0
0.00 %
England - Edge
Berks
PAR-NEW-IN
6
937
0.43 %
17
1.81 %
867
92.53 %
58
6.19 %
53
5.66 %
0
0.00 %
PAR-RECUR
1
132
0.06 %
2
1.52 %
118
89.39 %
13
9.85 %
11
8.33 %
1
0.76 %
Bucks
PAR-CUL-N
1
191
0.09 %
3
1.57 %
182
95.29 %
6
3.14 %
6
3.14 %
0
0.00 %
PAR-HERD-S
1
1
0.00 %
0
0.00 %
0
0.00 %
1
100.00 %
1
100.00 %
0
0.00 %
PAR-NEW-IN
23
3,343
1.52 %
109
3.26 %
3038
90.88 %
161
4.82 %
134
4.01 %
62
1.85 %
PAR-RECUR
13
766
0.35 %
24
3.13 %
690
90.08 %
47
6.14 %
40
5.22 %
12
1.57 %
Cheshire
PAR-CUL-N
5
768
0.35 %
21
2.73 %
718
93.49 %
36
4.69 %
29
3.78 %
0
0.00 %
PAR-OTHER
4
748
0.34 %
44
5.88 %
686
91.71 %
20
2.67 %
18
2.41 %
0
0.00 %
PAR-PERSIS
25
3,454
1.57 %
70
2.03 %
3176
91.95 %
235
6.80 %
200
5.79 %
8
0.23 %
PAR-HERD-S: potential herd slaughter, PAR-P-CONF (PAR-PERSIS from 1 April 2017): persistent TB breakdown OTFW, PAR-LOW-IN (PAR-NEW-IN from 1 April 2017): parallel low incidence, PAR-RAPID: rapid testing of twice IRs, PAR-CUL-N: new
infection in cull area, PAR-CUL-P: persistent infection in cull area, PAR-OTHER: parallel other, SER-FLEXI: flexible extended test in confirmed herds with concurrent Johne’s infection/vaccination, SER-NSR: serial non-specific reactor,
SER-FRAUD: serial potential fraud, SER-OTHER: serial other, PAR-CHR: chronic breakdown herds - where VL reactors are disclosed at a 3rd or subsequent SI test, or SLH case after a 2nd or subsequent SI test
* Sufficient plasma supernatant is collected and stored following the overnight culture stage of the assay such that if the sample fails any of the QC criteria, it is
possible for the laboratory to ‘re-test’ the original sample. Depending on the outcome of a retest, a resample (if QC criteria fail to be met), a positive or a negative
result will be reported. Therefore, the total number of samples = the sum of positive, negative, resample and reject samples only.

Table 2b. Summary by County for 2023 Cont.
Country
County
Submission
Reasons*
No.
subs
Samples
Gamma Positive
Gamma Negatives
Retest*
Resample
Reject
n
% of total
n
%
n
%
n
%
PAR-RECUR
5
755
0.34 %
51
6.75 %
665
88.08 %
51
6.75 %
39
5.17 %
0
0.00 %
Derbyshire
PAR-NEW-IN
14
778
0.35 %
41
5.27 %
682
87.66 %
65
8.35 %
55
7.07 %
0
0.00 %
PAR-RECUR
12
2,940
1.34 %
70
2.38 %
2730
92.86 %
167
5.68 %
140
4.76 %
0
0.00 %
E Sussex
PAR-NEW-IN
31
2,669
1.21 %
115
4.31 %
2411
90.33 %
179
6.71 %
141
5.28 %
2
0.07 %
SER-OTHER
2
37
0.02 %
0
0.00 %
33
89.19 %
4
10.81 %
4
10.81 %
0
0.00 %
Hampshire
PAR-NEW-IN
9
1,275
0.58 %
50
3.92 %
1166
91.45 %
70
5.49 %
56
4.39 %
3
0.24 %
PAR-RECUR
1
16
0.01 %
0
0.00 %
8
50.00 %
9
56.25 %
8
50.00 %
0
0.00 %
Leics & Rut
PAR-NEW-IN
28
3,458
1.57 %
105
3.04 %
3204
92.65 %
175
5.06 %
148
4.28 %
1
0.03 %
PAR-RECUR
1
135
0.06 %
11
8.15 %
120
88.89 %
7
5.19 %
4
2.96 %
0
0.00 %
Northants
PAR-NEW-IN
14
1,262
0.57 %
35
2.77 %
1025
81.22 %
97
7.69 %
83
6.58 %
119
9.43 %
PAR-RECUR
2
408
0.19 %
6
1.47 %
374
91.67 %
32
7.84 %
28
6.86 %
0
0.00 %
Notts
PAR-NEW-IN
9
553
0.25 %
13
2.35 %
501
90.60 %
60
10.85 %
37
6.69 %
2
0.36 %
Oxon
PAR-NEW-IN
6
429
0.20 %
8
1.86 %
398
92.77 %
28
6.53 %
23
5.36 %
0
0.00 %
PAR-PERSIS
3
976
0.44 %
39
4.00 %
895
91.70 %
57
5.84 %
42
4.30 %
0
0.00 %
PAR-RECUR
23
3,032
1.38 %
102
3.36 %
2791
92.05 %
182
6.00 %
137
4.52 %
2
0.07 %
SER-FLEXI
5
624
0.28 %
39
6.25 %
571
91.51 %
28
4.49 %
13
2.08 %
1
0.16 %
Warks
PAR-CHR
1
316
0.14 %
10
3.16 %
293
92.72 %
14
4.43 %
13
4.11 %
0
0.00 %
PAR-NEW-IN
7
683
0.31 %
22
3.22 %
638
93.41 %
34
4.98 %
23
3.37 %
0
0.00 %
PAR-OTHER
1
19
0.01 %
0
0.00 %
0
0.00 %
0
0.00 %
0
0.00 %
19
100.00 %
PAR-RECUR
13
318
0.14 %
9
2.83 %
222
69.81 %
27
8.49 %
23
7.23 %
64
20.13 %
England - LRA
Beds
PAR-PERSIS
2
263
0.12 %
17
6.46 %
212
80.61 %
22
8.37 %
16
6.08 %
18
6.84 %
Cumbria
PAR-NEW-IN
25
4,553
2.07 %
192
4.22 %
4080
89.61 %
310
6.81 %
273
6.00 %
8
0.18 %
PAR-OTHER
2
223
0.10 %
0
0.00 %
206
92.38 %
20
8.97 %
17
7.62 %
0
0.00 %
Essex
PAR-NEW-IN
7
547
0.25 %
10
1.83 %
353
64.53 %
9
1.65 %
7
1.28 %
177
32.36 %
Gr Manchester
PAR-NEW-IN
2
253
0.12 %
5
1.98 %
219
86.56 %
32
12.65 %
28
11.07 %
1
0.40 %
PAR-PERSIS
4
70
0.03 %
0
0.00 %
63
90.00 %
8
11.43 %
7
10.00 %
0
0.00 %
Herts
PAR-NEW-IN
2
153
0.07 %
0
0.00 %
149
97.39 %
7
4.58 %
4
2.61 %
0
0.00 %
PAR-RECUR
1
79
0.04 %
2
2.53 %
76
96.20 %
3
3.80 %
1
1.27 %
0
0.00 %
PAR-HERD-S: potential herd slaughter, PAR-P-CONF (PAR-PERSIS from 1 April 2017): persistent TB breakdown OTFW, PAR-LOW-IN (PAR-NEW-IN from 1 April 2017): parallel low incidence, PAR-RAPID: rapid testing of twice IRs, PAR-CUL-N: new
infection in cull area, PAR-CUL-P: persistent infection in cull area, PAR-OTHER: parallel other, SER-FLEXI: flexible extended test in confirmed herds with concurrent Johne’s infection/vaccination, SER-NSR: serial non-specific reactor,
SER-FRAUD: serial potential fraud, SER-OTHER: serial other, PAR-CHR: chronic breakdown herds - where VL reactors are disclosed at a 3rd or subsequent SI test, or SLH case after a 2nd or subsequent SI test
* Sufficient plasma supernatant is collected and stored following the overnight culture stage of the assay such that if the sample fails any of the QC criteria, it is
possible for the laboratory to ‘re-test’ the original sample. Depending on the outcome of a retest, a resample (if QC criteria fail to be met), a positive or a negative
result will be reported. Therefore, the total number of samples = the sum of positive, negative, resample and reject samples only.

Table 2b. Summary by County for 2023 Cont.
Country
County
Submission
Reasons*
No.
subs
Samples
Gamma Positive
Gamma Negatives
Retest*
Resample
Reject
n
% of total
n
%
n
%
n
%
Humberside
PAR-NEW-IN
6
415
0.19 %
3
0.72 %
352
84.82 %
80
19.28 %
58
13.98 %
2
0.48 %
Lancashire
PAR-NEW-IN
3
409
0.19 %
4
0.98 %
374
91.44 %
32
7.82 %
31
7.58 %
0
0.00 %
Lincs
PAR-NEW-IN
13
1,612
0.73 %
31
1.92 %
1467
91.00 %
124
7.69 %
114
7.07 %
0
0.00 %
Norfolk
PAR-NEW-IN
3
384
0.17 %
16
4.17 %
283
73.70 %
31
8.07 %
26
6.77 %
59
15.36 %
Northumb
PAR-NEW-IN
2
42
0.02 %
1
2.38 %
33
78.57 %
7
16.67 %
6
14.29 %
2
4.76 %
N Yorks
PAR-NEW-IN
20
2,488
1.13 %
32
1.29 %
2325
93.45 %
130
5.23 %
100
4.02 %
31
1.25 %
Surrey
PAR-NEW-IN
7
869
0.40 %
24
2.76 %
694
79.86 %
58
6.67 %
53
6.10 %
98
11.28 %
W Sussex
PAR-NEW-IN
6
1,000
0.45 %
16
1.60 %
822
82.20 %
178
17.80 %
162
16.20 %
0
0.00 %
W Yorks
PAR-NEW-IN
3
117
0.05 %
0
0.00 %
106
90.60 %
12
10.26 %
9
7.69 %
2
1.71 %
England
1016
144258
65.62 %
6041
4.19 %
129346
89.66 %
8923
6.19 %
7184
4.98 %
xx-xxxx-xxxx
1.17 %
Wales - High TB
Carms
PAR-IR-EX
12
52
0.02 %
13
25.00 %
37
71.15 %
2
3.85 %
2
3.85 %
0
0.00 %
PAR-IR-SEV
57
429
0.20 %
143
33.33 %
267
62.24 %
27
6.29 %
19
4.43 %
0
0.00 %
PAR-OTHER
8
353
0.16 %
23
6.52 %
302
85.55 %
33
9.35 %
28
7.93 %
0
0.00 %
PAR-PERSIS
32
2,603
1.18 %
124
4.76 %
2335
89.70 %
166
6.38 %
132
5.07 %
12
0.46 %
PAR-RAPID
76
213
0.10 %
72
33.80 %
130
61.03 %
13
6.10 %
10
4.69 %
1
0.47 %
PAR-RECUR
12
663
0.30 %
40
6.03 %
592
89.29 %
35
5.28 %
28
4.22 %
3
0.45 %
SER-ANOM
4
17
0.01 %
0
0.00 %
15
88.24 %
2
11.76 %
2
11.76 %
0
0.00 %
SER-FLEXI
18
1,312
0.60 %
89
6.78 %
1171
89.25 %
63
4.80 %
48
3.66 %
4
0.30 %
SER-FRAUD
1
14
0.01 %
0
0.00 %
13
92.86 %
1
7.14 %
1
7.14 %
0
0.00 %
Ceredigion
PAR-IR-EX
14
53
0.02 %
10
18.87 %
38
71.70 %
5
9.43 %
5
9.43 %
0
0.00 %
PAR-IR-SEV
32
229
0.10 %
49
21.40 %
169
73.80 %
16
6.99 %
11
4.80 %
0
0.00 %
PAR-OTHER
1
1
0.00 %
1
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-PERSIS
13
1,505
0.68 %
91
6.05 %
1367
90.83 %
53
3.52 %
45
2.99 %
2
0.13 %
PAR-RAPID
23
55
0.03 %
16
29.09 %
36
65.45 %
2
3.64 %
2
3.64 %
1
1.82 %
PAR-RECUR
3
147
0.07 %
6
4.08 %
137
93.20 %
3
2.04 %
3
2.04 %
1
0.68 %
SER-FLEXI
10
533
0.24 %
88
16.51 %
421
78.99 %
38
7.13 %
24
4.50 %
0
0.00 %
Gwent
PAR-IR-EX
4
28
0.01 %
17
60.71 %
11
39.29 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-IR-SEV
12
63
0.03 %
22
34.92 %
38
60.32 %
3
4.76 %
3
4.76 %
0
0.00 %
PAR-HERD-S: potential herd slaughter, PAR-P-CONF (PAR-PERSIS from 1 April 2017): persistent TB breakdown OTFW, PAR-LOW-IN (PAR-NEW-IN from 1 April 2017): parallel low incidence, PAR-RAPID: rapid testing of twice IRs, PAR-CUL-N: new
infection in cull area, PAR-CUL-P: persistent infection in cull area, PAR-OTHER: parallel other, SER-FLEXI: flexible extended test in confirmed herds with concurrent Johne’s infection/vaccination, SER-NSR: serial non-specific reactor,
SER-FRAUD: serial potential fraud, SER-OTHER: serial other, PAR-CHR: chronic breakdown herds - where VL reactors are disclosed at a 3rd or subsequent SI test, or SLH case after a 2nd or subsequent SI test
* Sufficient plasma supernatant is collected and stored following the overnight culture stage of the assay such that if the sample fails any of the QC criteria, it is
possible for the laboratory to ‘re-test’ the original sample. Depending on the outcome of a retest, a resample (if QC criteria fail to be met), a positive or a negative
result will be reported. Therefore, the total number of samples = the sum of positive, negative, resample and reject samples only.

Table 2b. Summary by County for 2023 Cont.
Country
County
Submission
Reasons*
No.
subs
Samples
Gamma Positive
Gamma Negatives
Retest*
Resample
Reject
n
% of total
n
%
n
%
n
%
PAR-OTHER
4
15
0.01 %
4
26.67 %
11
73.33 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-PERSIS
4
425
0.19 %
19
4.47 %
389
91.53 %
27
6.35 %
16
3.76 %
1
0.24 %
PAR-RAPID
27
62
0.03 %
9
14.52 %
48
77.42 %
7
11.29 %
5
8.06 %
0
0.00 %
PAR-RECUR
12
804
0.37 %
34
4.23 %
719
89.43 %
78
9.70 %
49
6.09 %
2
0.25 %
SER-FLEXI
15
1,504
0.68 %
64
4.26 %
1375
91.42 %
77
5.12 %
56
3.72 %
9
0.60 %
Monmouthshire and
newport
PAR-RAPID
1
1
0.00 %
0
0.00 %
1
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
Pembs
PAR-HERD-S
1
2
0.00 %
0
0.00 %
2
100.00 %
1
50.00 %
0
0.00 %
0
0.00 %
PAR-IR-EX
56
253
0.12 %
78
30.83 %
160
63.24 %
16
6.32 %
14
5.53 %
1
0.40 %
PAR-IR-SEV
208
1,648
0.75 %
473
28.70 %
1094
66.38 %
99
6.01 %
68
4.13 %
13
0.79 %
PAR-OTHER
10
411
0.19 %
29
7.06 %
321
78.10 %
71
17.27 %
61
14.84 %
0
0.00 %
PAR-PERSIS
66
6,345
2.89 %
353
5.56 %
5646
88.98 %
445
7.01 %
330
5.20 %
16
0.25 %
PAR-RAPID
109
315
0.14 %
63
20.00 %
239
75.87 %
18
5.71 %
12
3.81 %
1
0.32 %
PAR-RECUR
37
3,394
1.54 %
159
4.68 %
2950
86.92 %
185
5.45 %
144
4.24 %
141
4.15 %
SER-FLEXI
51
4,045
1.84 %
149
3.68 %
3689
91.20 %
260
6.43 %
186
4.60 %
21
0.52 %
Powys
PAR-IR-EX
10
61
0.03 %
19
31.15 %
40
65.57 %
2
3.28 %
2
3.28 %
0
0.00 %
PAR-IR-SEV
34
285
0.13 %
39
13.68 %
222
77.89 %
31
10.88 %
23
8.07 %
1
0.35 %
PAR-NEW-IN
2
152
0.07 %
13
8.55 %
131
86.18 %
10
6.58 %
8
5.26 %
0
0.00 %
PAR-OTHER
4
44
0.02 %
4
9.09 %
35
79.55 %
6
13.64 %
5
11.36 %
0
0.00 %
PAR-PERSIS
9
1,379
0.63 %
31
2.25 %
1284
93.11 %
36
2.61 %
28
2.03 %
36
2.61 %
PAR-POSTM
1
1
0.00 %
0
0.00 %
1
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-RAPID
40
65
0.03 %
11
xx-xxxx-xxxx %
51
78.46 %
4
6.15 %
3
4.62 %
0
0.00 %
PAR-RECUR
17
570
0.26 %
24
4.21 %
470
82.46 %
83
14.56 %
73
12.81 %
3
0.53 %
SER-FLEXI
15
2,858
1.30 %
77
2.69 %
2641
92.41 %
131
4.58 %
110
3.85 %
30
1.05 %
S Wales
PAR-IR-SEV
3
25
0.01 %
14
56.00 %
11
44.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-PERSIS
3
207
0.09 %
8
3.86 %
191
92.27 %
10
4.83 %
8
3.86 %
0
0.00 %
PAR-RAPID
3
3
0.00 %
1
33.33 %
1
33.33 %
0
0.00 %
0
0.00 %
1
33.33 %
PAR-RECUR
2
63
0.03 %
4
6.35 %
44
69.84 %
16
25.40 %
15
23.81 %
0
0.00 %
W Glamorgan
PAR-OTHER
4
121
0.06 %
6
4.96 %
99
81.82 %
19
15.70 %
15
12.40 %
1
0.83 %
PAR-HERD-S: potential herd slaughter, PAR-P-CONF (PAR-PERSIS from 1 April 2017): persistent TB breakdown OTFW, PAR-LOW-IN (PAR-NEW-IN from 1 April 2017): parallel low incidence, PAR-RAPID: rapid testing of twice IRs, PAR-CUL-N: new
infection in cull area, PAR-CUL-P: persistent infection in cull area, PAR-OTHER: parallel other, SER-FLEXI: flexible extended test in confirmed herds with concurrent Johne’s infection/vaccination, SER-NSR: serial non-specific reactor,
SER-FRAUD: serial potential fraud, SER-OTHER: serial other, PAR-CHR: chronic breakdown herds - where VL reactors are disclosed at a 3rd or subsequent SI test, or SLH case after a 2nd or subsequent SI test
* Sufficient plasma supernatant is collected and stored following the overnight culture stage of the assay such that if the sample fails any of the QC criteria, it is
possible for the laboratory to ‘re-test’ the original sample. Depending on the outcome of a retest, a resample (if QC criteria fail to be met), a positive or a negative
result will be reported. Therefore, the total number of samples = the sum of positive, negative, resample and reject samples only.

Table 2b. Summary by County for 2023 Cont.
Country
County
Submission
Reasons*
No.
subs
Samples
Gamma Positive
Gamma Negatives
Retest*
Resample
Reject
n
% of total
n
%
n
%
n
%
Wales - Intermediate TB
Carms
PAR-IR-SEV
2
14
0.01 %
9
64.29 %
5
35.71 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-OTHER
3
253
0.12 %
43
17.00 %
195
77.08 %
15
5.93 %
14
5.53 %
1
0.40 %
PAR-PERSIS
3
234
0.11 %
28
11.97 %
196
83.76 %
9
3.85 %
6
2.56 %
4
1.71 %
PAR-RAPID
11
22
0.01 %
7
31.82 %
12
54.55 %
3
13.64 %
3
13.64 %
0
0.00 %
PAR-RECUR
7
493
0.22 %
23
4.67 %
442
89.66 %
27
5.48 %
23
4.67 %
5
1.01 %
Ceredigion
PAR-IR-EX
4
32
0.01 %
7
21.88 %
21
65.63 %
3
9.38 %
3
9.38 %
1
3.13 %
PAR-IR-SEV
1
1
0.00 %
1
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-OTHER
5
356
0.16 %
36
10.11 %
285
80.06 %
17
4.78 %
11
3.09 %
24
6.74 %
PAR-PERSIS
2
341
0.16 %
45
13.20 %
271
79.47 %
29
8.50 %
25
7.33 %
0
0.00 %
PAR-RAPID
4
20
0.01 %
11
55.00 %
9
45.00 %
1
5.00 %
0
0.00 %
0
0.00 %
Cheshire
PAR-NEW-IN
2
12
0.01 %
0
0.00 %
9
75.00 %
5
41.67 %
3
25.00 %
0
0.00 %
Mid Glamorgan
PAR-RAPID
4
6
0.00 %
2
33.33 %
3
50.00 %
1
16.67 %
1
16.67 %
0
0.00 %
NE Wales
PAR-IR-EX
35
101
0.05 %
22
21.78 %
69
68.32 %
12
11.88 %
10
9.90 %
0
0.00 %
PAR-IR-SEV
44
357
0.16 %
60
xx-xxxx-xxxx %
286
80.11 %
15
4.20 %
11
3.08 %
0
0.00 %
PAR-NEW-IN
99
8,454
3.85 %
190
2.25 %
7702
91.10 %
608
7.19 %
510
6.03 %
52
0.62 %
PAR-OTHER
1
9
0.00 %
2
22.22 %
7
77.78 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-PERSIS
15
1,116
0.51 %
22
1.97 %
1014
90.86 %
105
9.41 %
79
7.08 %
1
0.09 %
PAR-POSTM
12
65
0.03 %
6
9.23 %
56
86.15 %
4
6.15 %
3
4.62 %
0
0.00 %
PAR-RAPID
23
44
0.02 %
11
25.00 %
32
72.73 %
1
2.27 %
1
2.27 %
0
0.00 %
PAR-RECUR
5
129
0.06 %
3
2.33 %
106
82.17 %
29
22.48 %
20
15.50 %
0
0.00 %
SER-FLEXI
4
86
0.04 %
6
6.98 %
75
87.21 %
5
5.81 %
5
5.81 %
0
0.00 %
Powys
PAR-IR-EX
1
2
0.00 %
2
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-IR-SEV
5
10
0.00 %
3
30.00 %
6
60.00 %
1
10.00 %
1
10.00 %
0
0.00 %
PAR-NEW-IN
23
2,436
1.11 %
54
2.22 %
2201
90.35 %
181
7.43 %
158
6.49 %
23
0.94 %
PAR-OTHER
1
1
0.00 %
0
0.00 %
1
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-PERSIS
2
299
0.14 %
13
4.35 %
270
90.30 %
19
6.35 %
16
5.35 %
0
0.00 %
PAR-RAPID
3
52
0.02 %
8
15.38 %
44
84.62 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-RECUR
3
128
0.06 %
0
0.00 %
118
92.19 %
13
10.16 %
10
7.81 %
0
0.00 %
PAR-HERD-S: potential herd slaughter, PAR-P-CONF (PAR-PERSIS from 1 April 2017): persistent TB breakdown OTFW, PAR-LOW-IN (PAR-NEW-IN from 1 April 2017): parallel low incidence, PAR-RAPID: rapid testing of twice IRs, PAR-CUL-N: new
infection in cull area, PAR-CUL-P: persistent infection in cull area, PAR-OTHER: parallel other, SER-FLEXI: flexible extended test in confirmed herds with concurrent Johne’s infection/vaccination, SER-NSR: serial non-specific reactor,
SER-FRAUD: serial potential fraud, SER-OTHER: serial other, PAR-CHR: chronic breakdown herds - where VL reactors are disclosed at a 3rd or subsequent SI test, or SLH case after a 2nd or subsequent SI test
* Sufficient plasma supernatant is collected and stored following the overnight culture stage of the assay such that if the sample fails any of the QC criteria, it is
possible for the laboratory to ‘re-test’ the original sample. Depending on the outcome of a retest, a resample (if QC criteria fail to be met), a positive or a negative
result will be reported. Therefore, the total number of samples = the sum of positive, negative, resample and reject samples only.

Table 2b. Summary by County for 2023 Cont.
Country
County
Submission
Reasons*
No.
subs
Samples
Gamma Positive
Gamma Negatives
Retest*
Resample
Reject
n
% of total
n
%
n
%
n
%
S Glamorgan
PAR-RAPID
4
8
0.00 %
1
12.50 %
7
87.50 %
0
0.00 %
0
0.00 %
0
0.00 %
Shropshire
PAR-PERSIS
2
5
0.00 %
0
0.00 %
5
100.00 %
1
20.00 %
0
0.00 %
0
0.00 %
Wales - Low TB
Conwy
PAR-NEW-IN
3
217
0.10 %
0
0.00 %
208
95.85 %
13
5.99 %
8
3.69 %
1
0.46 %
Gwynedd
PAR-HERD-S
1
1
0.00 %
0
0.00 %
1
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-IR-SEV
4
8
0.00 %
0
0.00 %
7
87.50 %
1
12.50 %
1
12.50 %
0
0.00 %
PAR-NEW-IN
122
8,460
3.85 %
240
2.84 %
7648
90.40 %
684
8.09 %
539
6.37 %
33
0.39 %
PAR-OTHER
2
11
0.01 %
1
9.09 %
7
63.64 %
3
27.27 %
3
27.27 %
0
0.00 %
PAR-PERSIS
3
40
0.02 %
0
0.00 %
38
95.00 %
4
10.00 %
2
5.00 %
0
0.00 %
PAR-POSTM
5
5
0.00 %
2
40.00 %
3
60.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-RAPID
2
3
0.00 %
1
33.33 %
2
66.67 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-RECUR
5
291
0.13 %
10
3.44 %
267
91.75 %
18
6.19 %
13
4.47 %
1
0.34 %
NE Wales
PAR-IR-EX
6
22
0.01 %
8
36.36 %
14
63.64 %
1
4.55 %
0
0.00 %
0
0.00 %
PAR-IR-SEV
5
16
0.01 %
5
31.25 %
11
68.75 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-NEW-IN
76
6,092
2.77 %
128
2.10 %
5324
87.39 %
623
10.23 %
398
6.53 %
242
3.97 %
PAR-POSTM
9
23
0.01 %
3
13.04 %
20
86.96 %
1
4.35 %
0
0.00 %
0
0.00 %
PAR-RAPID
4
9
0.00 %
0
0.00 %
8
88.89 %
1
11.11 %
1
11.11 %
0
0.00 %
SER-FLEXI
4
165
0.08 %
12
7.27 %
138
83.64 %
17
10.30 %
15
9.09 %
0
0.00 %
NW Wales
PAR-NEW-IN
2
24
0.01 %
0
0.00 %
23
95.83 %
1
4.17 %
1
4.17 %
0
0.00 %
Wales
1663
63801
29.02 %
3514
5.51 %
56110
87.95 %
4565
7.16 %
3488
5.47 %
689
1.08 %
Scotland - Scotland
Argyll & Bute
PAR-NEW-IN
2
427
0.19 %
1
0.23 %
394
92.27 %
39
9.13 %
32
7.49 %
0
0.00 %
Ayrshire
PAR-NEW-IN
22
2,289
1.04 %
96
4.19 %
1957
85.50 %
271
11.84 %
231
10.09 %
5
0.22 %
Kirkcudbright
PAR-CUL-N
1
9
0.00 %
0
0.00 %
8
88.89 %
1
11.11 %
1
11.11 %
0
0.00 %
PAR-NEW-IN
26
4,826
2.20 %
196
4.06 %
4342
89.97 %
330
6.84 %
288
5.97 %
0
0.00 %
Perthshire
PAR-OTHER
1
2
0.00 %
0
0.00 %
2
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
Renfrew
SER-OTHER
1
2
0.00 %
0
0.00 %
2
100.00 %
1
50.00 %
0
0.00 %
0
0.00 %
Roxburgh
PAR-CUL-N
1
129
0.06 %
6
4.65 %
119
92.25 %
5
3.88 %
4
3.10 %
0
0.00 %
PAR-NEW-IN
6
662
0.30 %
9
1.36 %
633
95.62 %
19
2.87 %
17
2.57 %
3
0.45 %
West lothian
PAR-NEW-IN
12
1,097
0.50 %
38
3.46 %
906
82.59 %
95
8.66 %
85
7.75 %
68
6.20 %
PAR-HERD-S: potential herd slaughter, PAR-P-CONF (PAR-PERSIS from 1 April 2017): persistent TB breakdown OTFW, PAR-LOW-IN (PAR-NEW-IN from 1 April 2017): parallel low incidence, PAR-RAPID: rapid testing of twice IRs, PAR-CUL-N: new
infection in cull area, PAR-CUL-P: persistent infection in cull area, PAR-OTHER: parallel other, SER-FLEXI: flexible extended test in confirmed herds with concurrent Johne’s infection/vaccination, SER-NSR: serial non-specific reactor,
SER-FRAUD: serial potential fraud, SER-OTHER: serial other, PAR-CHR: chronic breakdown herds - where VL reactors are disclosed at a 3rd or subsequent SI test, or SLH case after a 2nd or subsequent SI test
* Sufficient plasma supernatant is collected and stored following the overnight culture stage of the assay such that if the sample fails any of the QC criteria, it is
possible for the laboratory to ‘re-test’ the original sample. Depending on the outcome of a retest, a resample (if QC criteria fail to be met), a positive or a negative
result will be reported. Therefore, the total number of samples = the sum of positive, negative, resample and reject samples only.

Table 2b. Summary by County for 2023 Cont.
Country
County
Submission
Reasons*
No.
subs
Samples
Gamma Positive
Gamma Negatives
Retest*
Resample
Reject
n
% of total
n
%
n
%
n
%
Wigtown
PAR-NEW-IN
29
2,339
1.06 %
124
5.30 %
2003
85.63 %
232
9.92 %
209
8.94 %
3
0.13 %
Scotland
101
11782
5.36 %
470
3.99 %
10366
87.98 %
993
8.43 %
867
7.36 %
79
0.67 %
Grand Total
Sum:
2780 219841
10025
195822
14481
11539
2455
*For test criteria please refer to Operational notes.
PAR-HERD-S: potential herd slaughter, PAR-P-CONF (PAR-PERSIS from 1 April 2017): persistent TB breakdown OTFW, PAR-LOW-IN (PAR-NEW-IN from 1 April 2017): parallel low incidence, PAR-RAPID: rapid testing of twice IRs, PAR-CUL-N: new
infection in cull area, PAR-CUL-P: persistent infection in cull area, PAR-OTHER: parallel other, SER-FLEXI: flexible extended test in confirmed herds with concurrent Johne’s infection/vaccination, SER-NSR: serial non-specific reactor,
SER-FRAUD: serial potential fraud, SER-OTHER: serial other, PAR-CHR: chronic breakdown herds - where VL reactors are disclosed at a 3rd or subsequent SI test, or SLH case after a 2nd or subsequent SI test
* Sufficient plasma supernatant is collected and stored following the overnight culture stage of the assay such that if the sample fails any of the QC criteria, it is
possible for the laboratory to ‘re-test’ the original sample. Depending on the outcome of a retest, a resample (if QC criteria fail to be met), a positive or a negative
result will be reported. Therefore, the total number of samples = the sum of positive, negative, resample and reject samples only.

Table 3a. Summary of IFN Gamma results by country and protocol December 2023
Country
Protocol
No
submissions Samples
Positive
Negatives
Retest*
Resample
Reject
n
% of total n
%
n
%
n
%
n
%
n
%
England
Parallel
69
9340
100.0%
496
5.3%
8405
90.0%
461
4.9%
376
4.0%
63
0.7%
Serial/Extended
1
2
0.0%
0
0.0 %
0
0.0 %
2 100.0%
2 100.0%
0
0.0 %
Total
70
9342
100.0%
496
5.3%
8405
90.0%
463
5.0%
378
4.0%
63
0.7%
Scotland
Parallel
3
300
100.0%
7
2.3%
266
88.7%
34
11.3%
27
9.0%
0
0.0 %
Serial/Extended
0
0
0.0 %
0
0.0 %
0
0.0 %
0
0.0 %
0
0.0 %
0
0.0 %
Total
3
300
100.0%
7
2.3%
266
88.7%
34
11.3%
27
9.0%
0
0.0 %
Wales
Parallel
104
4238
96.4%
371
8.8%
3521
83.1%
276
6.5%
238
5.6%
108
2.5%
Serial/Extended
6
157
3.6%
18
11.5%
128
81.5%
12
7.6%
10
6.4%
1
0.6%
Total
110
4395
100.0%
389
8.9%
3649
83.0%
288
6.6%
248
5.6%
109
2.5%
GB
Parallel
176
13878
98.9%
874
6.3%
12192
87.9%
771
5.6%
641
4.6%
171
1.2%
Serial/Extended
7
159
1.1%
18
11.3%
128
80.5%
14
8.8%
12
7.5%
1
0.6%
Total
183
14037
100.0%
892
6.4%
12320
87.8%
785
5.6%
653
4.7%
172
1.2%
70.00
110.00
3.00
* Sufficient plasma supernatant is collected and stored following the overnight culture stage of the assay such that if the sample fails any of the QC criteria, it is possible for the laboratory
to ‘re-test’ the original sample. Depending on the outcome of a retest, a resample (if QC criteria fail to be met), a positive or a negative result will be reported. Therefore, the total number
of samples = the sum of positive, negative, resample and reject samples only.

Table 3b. Summary of IFN Gamma results by country and protocol (Total 2023)
Country
Protocol
No
submissions Samples
Positive
Negatives
Retest*
Resample
Reject
n
% of total n
%
n
%
n
%
n
%
n
%
England
Parallel
1009 143597
99.5%
6002
4.2% 128742
89.7%
8891
6.2%
7167
5.0%
xx-xxxx-xxxx
1.2%
Serial/Extended
7
661
0.5%
39
5.9%
604
91.4%
32
4.8%
17
2.6%
1
0.2%
Total
1016 144258
100.0%
6041
4.2% 129346
89.7%
8923
6.2%
7184
5.0%
xx-xxxx-xxxx
1.2%
Scotland
Parallel
100
11780
100.0%
470
4.0%
10364
88.0%
992
8.4%
867
7.4%
79
0.7%
Serial/Extended
1
2
0.0%
0
0.0 %
2 100.0%
1
50.0%
0
0.0 %
0
0.0 %
Total
101
11782
100.0%
470
4.0%
10366
88.0%
993
8.4%
867
7.4%
79
0.7%
Wales
Parallel
1541
53267
83.5%
3029
5.7%
46572
87.4%
3971
7.5%
3041
5.7%
625
1.2%
Serial/Extended
122
10534
16.5%
485
4.6%
9538
90.5%
594
5.6%
447
4.2%
64
0.6%
Total
1663
63801
100.0%
3514
5.5%
56110
87.9%
4565
7.2%
3488
5.5%
689
1.1%
GB
Parallel
2650 208644
94.9%
9501
4.6% 185678
89.0%
13854
6.6%
11075
5.3%
2390
1.1%
Serial/Extended
130
11197
5.1%
524
4.7%
10144
90.6%
627
5.6%
464
4.1%
65
0.6%
Total
2780 219841
100.0% 10025
4.6% 195822
89.1%
14481
6.6%
11539
5.2%
2455
1.1%
#######
#######
101.00
* Sufficient plasma supernatant is collected and stored following the overnight culture stage of the assay such that if the sample fails any of the QC criteria, it is possible for the laboratory
to ‘re-test’ the original sample. Depending on the outcome of a retest, a resample (if QC criteria fail to be met), a positive or a negative result will be reported. Therefore, the total number
of samples = the sum of positive, negative, resample and reject samples only.

Submission Reason
No
submissions Samples
Gamma Positive
Gamma Negatives
Retest
Resample
Reject
n
% of total
n
%
n
%
n
%
n
%
n
%
GB
Extended Flexible IFN-GAMMA test
6
157
1.1%
18
11.5%
128
81.5%
12
7.6 %
10
6.4 %
1
0.6 %
Parallel – chronic breakdown
4
131
0.9%
6
4.6%
108
82.4%
16
12.2 %
16
12.2 %
1
0.8 %
Parallel - IRs in Exit Strategy for persistent her
8
31
0.2%
12
38.7%
16
51.6%
3
9.7 %
3
9.7 %
0
Parallel New Infection
36
3219
22.9%
102
3.2%
2835
88.1%
248
7.7 %
220
6.8 %
62
1.9 %
Parallel - Other
5
272
1.9%
33
12.1%
198
72.8%
42
15.4 %
41
15.1 %
0
Parallel Persistent Infection
29
2076
14.8%
167
8.0%
1808
87.1%
119
5.7 %
96
4.6 %
5
0.2 %
Parallel - persistent infection cull area
2
665
4.7%
107
16.1%
545
82.0%
18
2.7 %
13
2.0 %
0
Parallel - Rapid Testing Two-times IRs
18
59
0.4%
19
32.2%
38
64.4%
2
3.4 %
2
3.4 %
0
Parallel - Recurrent breakdowns
48
7176
51.1%
341
4.8%
6486
90.4%
313
4.4 %
246
3.4 %
103
1.4 %
Parallel - severe IRs - in persistent herds
26
249
1.8%
87
34.9%
158
63.5%
10
4.0 %
4
1.6 %
0
Serial - Other
1
2
0.0%
0
0.0 %
0
0.0 %
2
100.0 %
2
100.0 %
0
Total
183
14037
100.0%
892
6.4%
12320
87.8%
785
5.6 %
653
4.7 %
172
1.2 %
Table 4a. Summaryof IFN Gamma results by submission reason (December 2023)
England - HRA
Parallel – chronic breakdown
4
131
0.9%
6
4.6%
108
82.4%
16
12.2 %
16
12.2 %
1
0.8 %
Parallel - Other
1
1
0.0%
0
0.0 %
1
100.0%
0
0
0
Parallel Persistent Infection
4
84
0.6%
12
14.3%
64
76.2%
10
11.9 %
8
9.5 %
0
Parallel - persistent infection cull area
2
665
4.7%
107
16.1%
545
82.0%
18
2.7 %
13
2.0 %
0
Parallel - Recurrent breakdowns
30
4413
31.4%
230
5.2%
4035
91.4%
185
4.2 %
146
3.3 %
2
0.0 %
England - HRA
41
5294
37.7%
355
6.7%
4753
89.8%
229
4.3 %
183
3.5 %
3
0.1 %
England - Edge
Parallel New Infection
7
677
4.8%
21
3.1%
632
93.4%
30
4.4 %
23
3.4 %
1
0.1 %
Parallel Persistent Infection
5
295
2.1%
8
2.7%
259
87.8%
30
10.2 %
28
9.5 %
0
Parallel - Recurrent breakdowns
11
2261
16.1%
82
3.6%
2092
92.5%
110
4.9 %
87
3.8 %
0
Serial - Other
1
2
0.0%
0
0.0 %
0
0.0 %
2
100.0 %
2
100.0 %
0
England - Edge
24
3235
23.0%
111
3.4%
2983
92.2%
172
5.3 %
140
4.3 %
1
0.0 %
England - LRA
Parallel New Infection
5
813
5.8%
30
3.7%
669
82.3%
62
7.6 %
55
6.8 %
59
7.3 %
England - LRA
5
813
5.8%
30
3.7%
669
82.3%
62
7.6 %
55
6.8 %
59
7.3 %
Wales - High TB
Extended Flexible IFN-GAMMA test
6
157
1.1%
18
11.5%
128
81.5%
12
7.6 %
10
6.4 %
1
0.6 %
Parallel - IRs in Exit Strategy for persistent her
3
10
0.1%
3
30.0%
5
50.0%
2
20.0 %
2
20.0 %
0
Parallel - Other
3
270
1.9%
33
12.2%
196
72.6%
42
15.6 %
41
15.2 %
0
Parallel Persistent Infection
16
1458
10.4%
119
8.2%
1284
88.1%
70
4.8 %
54
3.7 %
1
0.1 %
Parallel - Rapid Testing Two-times IRs
17
52
0.4%
18
34.6%
34
65.4%
0
0
0
Parallel - Recurrent breakdowns
7
502
3.6%
29
5.8%
359
71.5%
18
3.6 %
13
2.6 %
101
20.1 %
Parallel - severe IRs - in persistent herds
24
209
1.5%
83
39.7%
122
58.4%
10
4.8 %
4
1.9 %
0
Wales - High TB
76
2658
18.9%
303
11.4%
2128
80.1%
154
5.8 %
124
4.7 %
103
3.9 %
Wales - Intermediate TB
Parallel - IRs in Exit Strategy for persistent her
3
8
0.1%
3
37.5%
4
50.0%
1
12.5 %
1
12.5 %
0
Parallel New Infection
12
1053
7.5%
32
3.0%
929
88.2%
93
8.8 %
90
8.5 %
2
0.2 %
Parallel - Other
1
1
0.0%
0
0.0 %
1
100.0%
0
0
0
Parallel Persistent Infection
4
239
1.7%
28
11.7%
201
84.1%
9
3.8 %
6
2.5 %
4
1.7 %
Parallel - Rapid Testing Two-times IRs
1
7
0.0%
1
14.3%
4
57.1%
2
28.6 %
2
28.6 %
0
Parallel - severe IRs - in persistent herds
1
38
0.3%
4
10.5%
34
89.5%
0
0
0
Wales - Intermediate TB
22
1346
9.6%
68
5.1%
1173
87.1%
105
7.8 %
99
7.4 %
6
0.4 %
Wales - Low TB
Parallel - IRs in Exit Strategy for persistent her
2
13
0.1%
6
46.2%
7
53.8%
0
0
0
Parallel New Infection
9
376
2.7%
12
3.2%
339
90.2%
29
7.7 %
25
6.6 %
0
Parallel - severe IRs - in persistent herds
1
2
0.0%
0
0.0 %
2
100.0%
0
0
0
Wales - Low TB
12
391
2.8%
18
4.6%
348
89.0%
29
7.4 %
25
6.4 %
0
Scotland - Scotland
Parallel New Infection
3
300
2.1%
7
2.3%
266
88.7%
34
11.3 %
27
9.0 %
0
Scotland - Scotland
3
300
2.1%
7
2.3%
266
88.7%
34
11.3 %
27
9.0 %
0

Submission Reason
No
submissions Samples
Gamma Positive
Gamma Negatives
Retest
Resample
Reject
n
% of total
n
%
n
%
n
%
n
%
n
%
GB
Anomalous reaction
4
17
0.0%
0
0.0 %
15
88.2%
2
11.8 %
2
11.8 %
0
Extended Flexible IFN-GAMMA test
122
11127
5.1%
524
4.7%
10081
90.6%
619
5.6 %
457
4.1 %
65
0.6 %
Parallel – chronic breakdown
24
3412
1.6%
149
4.4%
3036
89.0%
267
7.8 %
225
6.6 %
2
0.1 %
Parallel - Herd or Group Slaughter
6
461
0.2%
36
7.8%
388
84.2%
54
11.7 %
37
8.0 %
0
Parallel - IRs in Exit Strategy for persistent herds
142
604
0.3%
176
29.1%
390
64.6%
41
6.8 %
36
6.0 %
2
0.3 %
Parallel New Infection
673
65904
30.0%
1956
3.0%
58833
89.3%
5057
7.7 %
4115
6.2 %
1000
1.5 %
Parallel - new infection cull area
39
6262
2.8%
252
4.0%
5728
91.5%
334
5.3 %
266
4.2 %
16
0.3 %
Parallel - Other
87
5768
2.6%
393
6.8%
4995
86.6%
407
7.1 %
327
5.7 %
53
0.9 %
Parallel Persistent Infection
232
26492
12.1%
1367
5.2%
23646
89.3%
1635
6.2 %
1268
4.8 %
211
0.8 %
Parallel - persistent infection cull area
5
1430
0.7%
143
10.0%
1230
86.0%
75
5.2 %
56
3.9 %
1
0.1 %
Parallel – post-mvt test coupled with IDEXX anti
27
94
0.0%
11
11.7%
80
85.1%
5
5.3 %
3
3.2 %
0
Parallel - Rapid Testing Two-times IRs
334
878
0.4%
213
24.3%
623
71.0%
51
5.8 %
38
4.3 %
4
0.5 %
Parallel - Recurrent breakdowns
674
94254
42.9%
3987
4.2%
84613
89.8%
5735
6.1 %
4567
4.8 %
1087
1.2 %
Parallel - severe IRs - in persistent herds
407
3085
1.4%
818
26.5%
2116
68.6%
193
6.3 %
137
4.4 %
14
0.5 %
Serial - Anomalous Reaction
1
14
0.0%
0
0.0 %
13
92.9%
1
7.1 %
1
7.1 %
0
Serial - Other
3
39
0.0%
0
0.0 %
35
89.7%
5
12.8 %
4
10.3 %
0
Total
2780 219841
100.0%
10025
4.6%
195822
89.1%
14481
6.6 %
11539
5.2 %
2455
1.1 %
Table 4b. Summary of IFN Gamma results by submission reason (Total 2023)
England - HRA
Parallel – chronic breakdown
23
3096
1.4%
139
4.5%
2743
88.6%
253
8.2 %
212
6.8 %
2
0.1 %
Parallel - Herd or Group Slaughter
3
457
0.2%
36
7.9%
385
84.2%
52
11.4 %
36
7.9 %
0
Parallel New Infection
1
188
0.1%
18
9.6%
165
87.8%
9
4.8 %
4
2.1 %
1
0.5 %
Parallel - new infection cull area
31
5165
2.3%
222
4.3%
4701
91.0%
286
5.5 %
226
4.4 %
16
0.3 %
Parallel - Other
36
3201
1.5%
200
6.2%
2838
88.7%
203
6.3 %
155
4.8 %
8
0.2 %
Parallel Persistent Infection
44
7230
3.3%
507
7.0%
6294
87.1%
409
5.7 %
316
4.4 %
113
1.6 %
Parallel - persistent infection cull area
5
1430
0.7%
143
10.0%
1230
86.0%
75
5.2 %
56
3.9 %
1
0.1 %
Parallel - Recurrent breakdowns
499
78991
35.9%
3407
4.3%
70974
89.9%
4710
6.0 %
3758
4.8 %
852
1.1 %
England - Edge
Extended Flexible IFN-GAMMA test
5
624
0.3%
39
6.3%
571
91.5%
28
4.5 %
13
2.1 %
1
0.2 %
Parallel – chronic breakdown
1
316
0.1%
10
3.2%
293
92.7%
14
4.4 %
13
4.1 %
0

Table 4b. Summary of IFN Gamma results by submission reason (Total 2023) Cont.
Parallel - Herd or Group Slaughter
1
1
0.0%
0
0.0 %
0
0.0 %
1
100.0 %
1
100.0 %
0
Parallel New Infection
147
15387
7.0%
515
3.3%
13930
90.5%
927
6.0 %
753
4.9 %
189
1.2 %
Parallel - new infection cull area
6
959
0.4%
24
2.5%
900
93.8%
42
4.4 %
35
3.6 %
0
Parallel - Other
5
767
0.3%
44
5.7%
686
89.4%
20
2.6 %
18
2.3 %
19
2.5 %
Parallel Persistent Infection
28
4430
2.0%
109
2.5%
4071
91.9%
292
6.6 %
242
5.5 %
8
0.2 %
Parallel - Recurrent breakdowns
71
8502
3.9%
275
3.2%
7718
90.8%
535
6.3 %
430
5.1 %
79
0.9 %
Serial - Other
2
37
0.0%
0
0.0 %
33
89.2%
4
10.8 %
4
10.8 %
0
England - LRA
Parallel New Infection
99
12842
5.8%
334
2.6%
11257
87.7%
1010
7.9 %
871
6.8 %
380
3.0 %
Parallel - Other
2
223
0.1%
0
0.0 %
206
92.4%
20
9.0 %
17
7.6 %
0
Parallel Persistent Infection
6
333
0.2%
17
5.1%
275
82.6%
30
9.0 %
23
6.9 %
18
5.4 %
Parallel - Recurrent breakdowns
1
79
0.0%
2
2.5%
76
96.2%
3
3.8 %
1
1.3 %
0
England
1016 144258
65.6%
6041
4.2%
129346
89.7%
8923
6.2 %
7184
5.0 %
xx-xxxx-xxxx
1.2 %
Wales - High TB
Anomalous reaction
4
17
0.0%
0
0.0 %
15
88.2%
2
11.8 %
2
11.8 %
0
Extended Flexible IFN-GAMMA test
109
10252
4.7%
467
4.6%
9297
90.7%
569
5.6 %
424
4.1 %
64
0.6 %
Parallel - Herd or Group Slaughter
1
2
0.0%
0
0.0 %
2
100.0%
1
50.0 %
0
0
Parallel - IRs in Exit Strategy for persistent herd
96
447
0.2%
137
30.6%
286
64.0%
25
5.6 %
23
5.1 %
1
0.2 %
Parallel New Infection
2
152
0.1%
13
8.6%
131
86.2%
10
6.6 %
8
5.3 %
0
Parallel - Other
31
945
0.4%
67
7.1%
768
81.3%
129
13.7 %
109
11.5 %
1
0.1 %
Parallel Persistent Infection
127
12464
5.7%
626
5.0%
11212
90.0%
737
5.9 %
559
4.5 %
67
0.5 %
Parallel – post-mvt test coupled with IDEXX ant
1
1
0.0%
0
0.0 %
1
100.0%
0
0
0
Parallel - Rapid Testing Two-times IRs
279
714
0.3%
172
24.1%
506
70.9%
44
6.2 %
32
4.5 %
4
0.6 %
Parallel - Recurrent breakdowns
83
5641
2.6%
267
4.7%
4912
87.1%
400
7.1 %
312
5.5 %
150
2.7 %
Parallel - severe IRs - in persistent herds
346
2679
1.2%
740
27.6%
1801
67.2%
176
6.6 %
124
4.6 %
14
0.5 %
Serial - Anomalous Reaction
1
14
0.0%
0
0.0 %
13
92.9%
1
7.1 %
1
7.1 %
0
Wales - Intermediate TB
Extended Flexible IFN-GAMMA test
4
86
0.0%
6
7.0%
75
87.2%
5
5.8 %
5
5.8 %
0
Parallel - IRs in Exit Strategy for persistent herd
40
135
0.1%
31
23.0%
90
66.7%
15
11.1 %
13
9.6 %
1
0.7 %
Parallel New Infection
124
10902
5.0%
244
2.2%
9912
90.9%
794
7.3 %
671
6.2 %
75
0.7 %
Parallel - Other
10
619
0.3%
81
13.1%
488
78.8%
32
5.2 %
25
4.0 %
25
4.0 %
Parallel Persistent Infection
24
1995
0.9%
108
5.4%
1756
88.0%
163
8.2 %
126
6.3 %
5
0.3 %
Parallel – post-mvt test coupled with IDEXX ant
12
65
0.0%
6
9.2%
56
86.2%
4
6.2 %
3
4.6 %
0
Parallel - Rapid Testing Two-times IRs
49
152
0.1%
40
26.3%
107
70.4%
6
3.9 %
5
3.3 %
0
Parallel - Recurrent breakdowns
15
750
0.3%
26
3.5%
666
88.8%
69
9.2 %
53
7.1 %
5
0.7 %
Parallel - severe IRs - in persistent herds
52
382
0.2%
73
19.1%
297
77.7%
16
4.2 %
12
3.1 %
0

Table 4b. Summary of IFN Gamma results by submission reason (Total 2023) Cont.
Wales - Low TB
Extended Flexible IFN-GAMMA test
4
165
0.1%
12
7.3%
138
83.6%
17
10.3 %
15
9.1 %
0
Parallel - Herd or Group Slaughter
1
1
0.0%
0
0.0 %
1
100.0%
0
0
0
Parallel - IRs in Exit Strategy for persistent herd
6
22
0.0%
8
36.4%
14
63.6%
1
4.5 %
0
0
Parallel New Infection
203
14793
6.7%
368
2.5%
13203
89.3%
1321
8.9 %
946
6.4 %
276
1.9 %
Parallel - Other
2
11
0.0%
1
9.1%
7
63.6%
3
27.3 %
3
27.3 %
0
Parallel Persistent Infection
3
40
0.0%
0
0.0 %
38
95.0%
4
10.0 %
2
5.0 %
0
Parallel – post-mvt test coupled with IDEXX ant
14
28
0.0%
5
17.9%
23
82.1%
1
3.6 %
0
0
Parallel - Rapid Testing Two-times IRs
6
12
0.0%
1
8.3%
10
83.3%
1
8.3 %
1
8.3 %
0
Parallel - Recurrent breakdowns
5
291
0.1%
10
3.4%
267
91.8%
18
6.2 %
13
4.5 %
1
0.3 %
Parallel - severe IRs - in persistent herds
9
24
0.0%
5
20.8%
18
75.0%
1
4.2 %
1
4.2 %
0
Wales
1663
63801
29.0%
3514
5.5%
56110
87.9%
4565
7.2 %
3488
5.5 %
689
1.1 %
Scotland - Scotland
Parallel New Infection
97
11640
5.3%
464
4.0%
10235
87.9%
986
8.5 %
862
7.4 %
79
0.7 %
Parallel - new infection cull area
2
138
0.1%
6
4.3%
127
92.0%
6
4.3 %
5
3.6 %
0
Parallel - Other
1
2
0.0%
0
0.0 %
2
100.0%
0
0
0
Serial - Other
1
2
0.0%
0
0.0 %
2
100.0%
1
50.0 %
0
0
Scotland
101
11782
5.4%
470
4.0%
10366
88.0%
993
8.4 %
867
7.4 %
79
0.7 %

Year
Month
Herds
sampled
Samples
tested
Herds
with
positives
IFNg+
samples
Wrong
Eartags
No PM
No
Cult
No PM
Cult
Pend
No PM
Cult
Neg
No PM
Cult
Mb
No
PM
Cult
Other
VL No
Cult
VL
Cult
Neg
VL
Cult
Pend
VL
Cult
Mb
VL
Cult
Other
NVL
No
Cult
NVL
Cult
Pend
NVL
Cult
Neg
NVL
Cult
Mb
NVL
Cult
Other
2023 January
281
23696
176
1138
10
0
0
0
0
83
3
0
18
0
922
1
100
1
0
February
265
17538
147
1036
6
0
0
0
0
69
1
4
31
0
837
0
88
0
0
March
266
19894
159
867
9
0
0
0
0
76
0
0
11
0
703
1
67
0
0
April
203
16194
118
782
1
10
0
0
0
0
53
6
0
11
0
634
0
58
1
4
May
208
13834
112
582
4
0
0
0
0
44
2
0
2
0
493
0
37
0
0
June
189
xx-xxxx-xxxx
94
524
2
0
0
0
0
33
2
0
9
0
447
0
31
0
0
July
209
18470
108
597
15
0
0
0
0
81
4
0
10
0
438
0
47
1
0
August
252
20681
140
867
7
0
0
0
0
95
6
0
19
0
675
0
65
0
0
September
221
18070
112
638
10
0
0
0
0
52
1
0
12
1
503
0
56
1
0
October
253
18656
139
825
1
8
0
0
0
0
50
0
1
9
1
701
11
42
0
1
November
250
22290
157
1277
5
59
0
0
0
0
142
0
23
2
0
948
91
6
0
0
December
183
14037
114
892
585
0
0
0
0
22
0
8
0
0
277
0
0
0
0
Totals (last
12 months)
2780
219841
1576
10025
7
725
0
0
0
0
800
25
36
134
2
7578
104
597
4
5
Table 5a. Summary of PM and culture results for IFNg positive animals.
Please note: “Wrong Eartags” – this column represents those samples in the laboratory information management system (LIMS) for which there is not a matching ear tag in the Cattle TB
Data dataset (SAM) at the time of monthly report trawling. Most resolve in subsequent monthly reports as the field data is added to SAM.

Country
Herds
sampled
Samples
tested
Herds
with
positives
IFNg+
samples
No PM
No
Cult
No PM
Cult
Pend
No PM
Cult
Neg
No PM
Cult
Mb
No
PM
Cult
Other
VL No
Cult
VL
Cult
Neg
VL
Cult
Pend
VL
Cult
Mb
VL
Cult
Other
NVL
No
Cult
NVL
Cult
Pend
NVL
Cult
Neg
NVL
Cult
Mb
NVL
Cult
Other
England
1016
144258
679
6041
400
0
0
0
0
660
12
19
48
2
4856
2
30
1
0
Scotland
101
11782
61
470
8
0
0
0
0
109
1
0
28
0
262
1
55
1
1
Wales
1663
63801
836
3514
317
0
0
0
0
31
12
17
58
0
2460
101
512
2
4
Totals
2780
219841
1576
10025
725
0
0
0
0
800
25
36
134
2
7578
104
597
4
5
Table 5b. Summary of culture results for IFNg positive animals (Samples received in last 12 months)

Figure 4a. Number of herds sampled for IFNg and numbers of herds with any
positive IFNg results.
133
129
97
132
103
165
90
130
111
158
99
114
139
109
130
144
98
107
80
100
81
120
91
109
105
176
118
147
107
159
85
118
96
112
95
94
101
108
112
140
109
112
114
139
93
157
69
114
0
50
100
150
200
250
300
January
February
March
April
May
June
July
August
September
October
November
December
January
February
March
April
May
June
July
August
September
October
November
December
2022
2023
IFNg Positive herds
IFNg Negative herds
17250
852
xx-xxxx-xxxx
966
21357
1108
14149
687
22824
918
17067
590
14705
485
18751
758
15643
672
15663
620
15019
673
12991
545
21877
1138
16071
1036
18641
867
15246
782
13167
582
15789
524
17758
597
19561
867
17206
638
17659
825
20756
1277
13035
892
0
5000
10000
15000
20000
25000
January
February
March
April
May
June
July
August
September
October
November
December
January
February
March
April
May
June
July
August
September
October
November
December
2022
2023
IFNg positive animals
IFNg non positive animals*
Figure 4b. Number of animals sampled for IFNg and numbers of animals with
positive IFNg results.
*Includes all animals with IFNg test negative, resample and reject outcomes

0
1
2
3
4
5
6
7
8
January
February
March
April
May
June
July
August
September
October
November
December
January
February
March
April
May
June
July
August
September
October
November
December
2022
2023
%Rejected
%Resampled
% NEG Fail
% POS Fail
% of total
submitted
Figure 5. Rates of resamples including the fail rates broken down for positive
(POS) and negative (NEG) controls.

0
50
100
150
200
250
W Sussex
W Midlands
Wiltshire
West lothian
Staffs
Somerset excl N
Shropshire
Powys
Pembs
Oxon
Northants
Norfolk
NE Wales
Leics & Rut
Heref
Gwynedd
Gwent
Gloucs
E Sussex
Devon
Derbyshire
Cumbria
Corn & Scilly
Cheshire
Ceredigion
Carms
Bucks
%Retested
%Resampled
Figure 6. Proportion of samples retested, or requiring a resample, during December 2023 (% submission per
County)
County
%Resampled %Retested
Bucks
6.25 %
6.56 %
Carms
5.39 %
6.88 %
Ceredigion
2.10 %
2.57 %
Cheshire
8.05 %
9.50 %
Corn & Scilly
2.62 %
3.13 %
Cumbria
7.03 %
7.03 %
Derbyshire
2.24 %
2.86 %
Devon
2.96 %
3.80 %
E Sussex
100.00 %
100.00 %
Gloucs
15.38 %
23.08 %
Gwent
2.00 %
3.60 %
Gwynedd
15.38 %
15.38 %
Heref
5.11 %
6.25 %
Leics & Rut
3.55 %
4.74 %
NE Wales
7.08 %
7.70 %
Norfolk
6.77 %
8.07 %
Northants
2.33 %
2.33 %
Oxon
3.33 %
4.56 %
Pembs
5.27 %
6.34 %
Powys
8.80 %
9.18 %
Shropshire
2.87 %
3.35 %
Somerset excl
8.87 %
8.87 %
Staffs
6.59 %
10.99 %
West lothian
9.00 %
11.33 %
Wiltshire
3.53 %
4.56 %
W Midlands
71.43 %
71.43 %
W Sussex
5.88 %
7.84 %

Country
No.
animals
No of IFNg+
animals
% Positive
animals
No. samples
No of IFNg+
samples
% Positive
samples
England
9286
496
5.3%
9342
496
5.3%
Wales
4342
389
9.0%
4395
389
8.9%
Scotland
300
7
2.3%
300
7
2.3%
GB
13927
892
6.4%
14037
892
6.4%
Table 6a (i): Number of animals and submissions tested in December 2023
Country
No.
animals
No of IFNg+
animals
% Positive
animals
No. samples
No of IFNg+
samples
% Positive
samples
England
134758
6040
4.5%
144258
6041
4.2%
Wales
59206
3514
5.9%
63801
3514
5.5%
Scotland
7528
470
6.2%
11782
470
4.0%
GB
201474
10024
5.0%
219841
10025
4.6%
Table 6b (i): Number of animals and submissions tested in 2023 Up to end of December
Country
No.
animals
No of IFNg+
animals
% Positive
animals
No. samples
No of IFNg+
samples
% Positive
samples
England
8225
236
2.9%
8337
236
2.8%
Wales
4783
304
6.4%
4834
304
6.3%
Scotland
528
5
0.9%
564
5
0.9%
GB
13536
545
4.0%
13735
545
4.0%
Table 6a (ii): Number of animals and submissions tested in December 2022
Table 6b (ii): Number of animals and submissions tested in 2022 Up to end of December
Country
No.
animals
No of IFNg+
animals
% Positive
animals
No. samples
No of IFNg+
samples
% Positive
samples
England
143809
5550
3.9%
153886
5550
3.6%
Wales
51519
3198
6.2%
55846
3198
5.7%
Scotland
4190
126
3.0%
4429
126
2.8%
GB
199516
8874
4.4%
214161
8874
4.1%

* Test type
Num
Submissions
Num Samples Num Positives
Private
% Positive
Cumbria
PRV-SE
1
8
3
37.50 %
Hampshire
PRV-SE
1
1
0
0
Total
2
9
3
33.33 %
*SER-IOM: Serial High Specificity test – Isle of Man; PRV-SE: Private High Sensitivity test - England;
PRV-SP: Private High Specificity test – England
Table 7a Number of private samples December 2023
Table 7b Number of private samples 2023
* Test type
Num
Submissions
Num
Samples
Num
Positives
Private
% Positive
Bedfordshire
PRV-SP
1
1
1
100.00 %
Cornwall and Isles of Scilly
PRV-SP
4
27
0
0
Cumbria
PRV-SE
2
11
6
54.55 %
Devon
PRV-SE
7
214
14
6.54 %
PRV-SP
2
3
0
0
East Sussex
PRV-SP
1
1
0
0
Essex
PRV-SP
1
5
0
0
Gloucestershire
PRV-SE
1
51
2
3.92 %
PRV-SP
1
2
0
0
Hampshire
PRV-SE
1
1
0
0
Herefordshire
PRV-SP
1
1
0
0
Kent
PRV-SP
2
13
0
0
Northamptonshire
PRV-SE
1
6
3
50.00 %
Oxfordshire
PRV-SP
2
2
0
0
Shropshire
PRV-SP
2
2
0
0
Somerset excl North
PRV-SE
1
1
0
0
PRV-SP
1
1
0
0
Warwickshire
PRV-SE
1
7
0
0
West Sussex
PRV-SE
5
567
29
5.11 %
PRV-SP
1
5
0
0
Total
38
921
55
5.97 %

Country
County
Test Reason
Num
Submissions
Num Samples
Tested
Num Positive
Samples
% Positive
England
Cornwall and Isles of
Scilly
BOV-P
1
264
62
23.5%
England
1
264
62
23.5%
Wales
Carmarthenshire
BOV-IR-C
6
55
1
1.8%
Ceredigion
BOV-IR-C
2
18
3
16.7%
North East Wales
BOV-IR-C
4
44
1
2.3%
BOV-IR-EX
1
11
7
63.6%
Pembrokeshire
BOV-IR-C
12
130
17
13.1%
BOV-IR-EX
1
5
2
40.0%
BOV-OTHER
1
11
0
0
BOV-P
1
111
4
3.6%
Powys
BOV-IR-C
1
2
1
50.0%
BOV-IR-EX
1
6
2
33.3%
South Wales
BOV-IR-C
3
18
5
27.8%
BOV-P
1
66
2
3.0%
Wales
34
477
45
9.4%
All GB
35
741
107
14.4 %
Table 8a Number of Cattle Antibody Tests December 2023
Table 8b Number of Cattle Antibody Tests 2023
Country
County
Test Reason
Num Submissions Num Samples Tested Num Positive Samples % Positive
England
Cornwall and Isles of
Scilly
BOV-OTHER
1
27
2
7.4%
BOV-P
3
833
100
12.0%
Herefordshire
BOV-P
1
316
8
2.5%
Northern Somerset &
South
Gloucestershire
BOV-P
1
5
0
0
Oxfordshire
BOV-P
2
564
23
4.1%
Somerset excl North
BOV-P
1
145
6
4.1%
England
9
1,890
139
7.4%
Scotland
Ayrshire
BOV-OTHER
1
2
1
50.0%
Scotland
1
2
1
50.0%
Wales
Carmarthenshire
BOV-IR-C
48
413
70
16.9%
BOV-IR-EX
7
40
6
15.0%
BOV-OTHER
4
196
13
6.6%
BOV-P
2
90
7
7.8%
Ceredigion
BOV-IR-C
31
296
42
14.2%
BOV-IR-EX
7
61
13
21.3%
BOV-OTHER
3
156
4
2.6%
North East Wales
BOV-IR-C
39
319
46
14.4%
BOV-IR-EX
7
44
11
25.0%
BOV-OTHER
1
54
0
0
BOV-P
2
67
2
3.0%
BOV-POSTM
8
21
5
23.8%
Pembrokeshire
BOV-IR-C
169
1,950
279
14.3%
BOV-IR-EX
32
235
39
16.6%

Country
County
Test Reason
Num Submissions Num Samples Tested Num Positive Samples % Positive
BOV-OTHER
18
1,654
66
4.0%
BOV-P
6
276
16
5.8%
Powys
1
8
1
12.5%
BOV-IR-C
37
287
28
9.8%
BOV-IR-EX
4
52
5
9.6%
BOV-OTHER
2
134
5
3.7%
South Wales
BOV-IR-C
16
102
20
19.6%
BOV-IR-EX
4
28
12
42.9%
BOV-OTHER
1
30
1
3.3%
BOV-P
6
321
18
5.6%
Wales
455
6,834
709
10.4%
All GB
465
8,726
849
9.7 %