Monthly report: Surveillance Project SB4008 IFNg Tests for Bovine Tuberculosis - January 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 197
Report Period 1st - 31st January 2023
Issued 10 February 2023

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
January
2023
%
Total 2023
%
Submissions
281
281
Samples
Total (%)
23696
100.00 %
23696
100.00 %
England
15554
65.64 %
15554
65.64 %
Wales
7214
30.44 %
7214
30.44 %
Scotland
928
3.92 %
928
3.92 %
Parallel Tests
PAR-CHR
0
0.00 %
PAR-CUL-N
2
0.01 %
2
0.01 %
PAR-CUL-P
0
0.00 %
PAR-HERD-S
0
0.00 %
PAR-IR-EX
52
0.22 %
52
0.22 %
PAR-IR-SEV
209
0.88 %
209
0.88 %
PAR-NEW-IN
9747
41.13 %
9747
41.13 %
PAR-OTHER
284
1.20 %
284
1.20 %
PAR-PERSIS
623
2.63 %
623
2.63 %
PAR-POSTM
19
0.08 %
19
0.08 %
PAR-RAPID
90
0.38 %
90
0.38 %
PAR-RECUR
12068
50.93 %
12068
50.93 %
Total(% of all samples)
23094
97.46 %
23094
97.46 %
Serial/Extended Tests
SER-ANOM
0
0.00 %
SER-FLEXI
602
2.54 %
602
2.54 %
SER-NSR
0
0.00 %
SER-OTHER
0
0.00 %
Total(% of all samples)
602
2.54 %
602
2.54 %
Total
23696
100.00 %
23696
100.00 %
Retests
Total (% of all samples)
1841
7.77 %
1841
7.77 %
England
1024
4.32 %
1024
4.32 %
Wales
733
3.09 %
733
3.09 %
Scotland
84
0.35 %
84
0.35 %
Resamples
Total (% of all samples)
1448
6.11 %
1448
6.11 %
England
897
3.79 %
897
3.79 %
Wales
472
1.99 %
472
1.99 %
Scotland
79
0.33 %
79
0.33 %
Rejects
Total (% of all samples)
1361
5.74 %
1361
5.74 %
England
1087
4.59 %
1087
4.59 %
Wales
256
1.08 %
256
1.08 %
Scotland
18
0.08 %
18
0.08 %
Table 1. Monthly Totals for January 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-CUL-N
PAR-IR-EX
PAR-IR-SEV
PAR-NEW-IN
PAR-OTHER
PAR-PERSIS
PAR-POSTM
PAR-RAPID
PAR-RECUR
SER-FLEXI
Breakdown of
Reason for
submission
PAR-CUL-N
2
0.0 %
PAR-IR-EX
52
0.2 %
PAR-IR-SEV
209
0.9 %
PAR-NEW-IN
9747
41.1 %
PAR-OTHER
284
1.2 %
PAR-PERSIS
623
2.6 %
PAR-POSTM
19
0.1 %
PAR-RAPID
90
0.4 %
PAR-RECUR
12068
50.9 %
SER-FLEXI
602
2.5 %
Total
23696
100.00 %
Figure 1. Number of samples submitted in each category during January 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
Wigtown
West lothian
Ayrshire
Shropshire
S Glamorgan
Powys
Pembs
NW Wales
NE Wales
Gwynedd
Gwent
Ceredigion
Carms
Wiltshire
Warks
Surrey
Staffs
Somerset excl N
Shropshire
Oxon
Notts
Northants
Lincs
Leics & Rut
Lancashire
Heref
Gloucs
Essex
Dorset
Devon
Derbyshire
Cumbria
Corn & Scilly
Cheshire
Bucks
Berks
Avon
Scotland
Wales
England
SER-FLEXI
PAR-RECUR
PAR-RAPID
PAR-POSTM
PAR-PERSIS
PAR-OTHER
PAR-NEW-IN
PAR-IR-SEV
PAR-IR-EX
PAR-CUL-N
Breakdown of
Samples
submitted by
County
Figure 2. Number of samples submitted in each category by County during January 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
Wigtown
West lothian
Ayrshire
Shropshire
S Glamorgan
Powys
Pembs
NW Wales
NE Wales
Gwynedd
Gwent
Ceredigion
Carms
Wiltshire
Warks
Surrey
Staffs
Somerset excl N
Shropshire
Oxon
Notts
Northants
Lincs
Leics & Rut
Lancashire
Heref
Gloucs
Essex
Dorset
Devon
Derbyshire
Cumbria
Corn & Scilly
Cheshire
Bucks
Berks
Avon
Scotland
Wales
England
SER-FLEXI
PAR-RECUR
PAR-RAPID
PAR-POSTM
PAR-PERSIS
PAR-OTHER
PAR-NEW-IN
PAR-IR-SEV
PAR-IR-EX
PAR-CUL-N
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
Avon
PAR-RECUR
4
224
0.95 %
6
2.68 %
200
89.29 %
18
8.04 %
17
7.59 %
1
0.45 %
Corn & Scilly
PAR-RECUR
6
2,935
12.39 %
145
4.94 %
2593
88.35 %
217
7.39 %
197
6.71 %
0
0.00 %
Devon
PAR-CUL-N
1
2
0.01 %
0
0.00 %
1
50.00 %
1
50.00 %
1
50.00 %
0
0.00 %
PAR-RECUR
4
997
4.21 %
18
1.81 %
674
67.60 %
44
4.41 %
39
3.91 %
266
26.68 %
Dorset
PAR-RECUR
2
717
3.03 %
12
1.67 %
321
44.77 %
22
3.07 %
22
3.07 %
362
50.49 %
Gloucs
PAR-RECUR
1
438
1.85 %
21
4.79 %
396
90.41 %
24
5.48 %
21
4.79 %
0
0.00 %
Heref
PAR-RECUR
6
2,102
8.87 %
139
6.61 %
1836
87.35 %
145
6.90 %
127
6.04 %
0
0.00 %
Shropshire
PAR-RECUR
8
582
2.46 %
16
2.75 %
538
92.44 %
32
5.50 %
27
4.64 %
1
0.17 %
Somerset excl N
PAR-RECUR
2
353
1.49 %
11
3.12 %
329
93.20 %
14
3.97 %
12
3.40 %
1
0.28 %
Staffs
PAR-RECUR
7
969
4.09 %
22
2.27 %
835
86.17 %
92
9.49 %
83
8.57 %
29
2.99 %
Wiltshire
PAR-RECUR
2
167
0.70 %
3
1.80 %
158
94.61 %
11
6.59 %
6
3.59 %
0
0.00 %
England - Edge
Berks
PAR-NEW-IN
3
591
2.49 %
8
1.35 %
548
92.72 %
37
6.26 %
35
5.92 %
0
0.00 %
Bucks
PAR-NEW-IN
3
495
2.09 %
16
3.23 %
457
92.32 %
23
4.65 %
22
4.44 %
0
0.00 %
Cheshire
PAR-RECUR
2
215
0.91 %
2
0.93 %
201
93.49 %
15
6.98 %
12
5.58 %
0
0.00 %
Derbyshire
PAR-RECUR
4
978
4.13 %
31
3.17 %
881
90.08 %
72
7.36 %
66
6.75 %
0
0.00 %
Leics & Rut
PAR-NEW-IN
2
169
0.71 %
9
5.33 %
147
86.98 %
16
9.47 %
13
7.69 %
0
0.00 %
Northants
PAR-NEW-IN
5
772
3.26 %
16
2.07 %
590
76.42 %
57
7.38 %
48
6.22 %
118
15.28 %
Notts
PAR-NEW-IN
3
230
0.97 %
5
2.17 %
211
91.74 %
28
12.17 %
12
5.22 %
2
0.87 %
Oxon
PAR-RECUR
2
59
0.25 %
11
18.64 %
46
77.97 %
4
6.78 %
2
3.39 %
0
0.00 %
Warks
PAR-OTHER
1
19
0.08 %
0
0.00 %
0
0.00 %
0
0.00 %
0
0.00 %
19
100.00 %
PAR-RECUR
7
90
0.38 %
4
4.44 %
62
68.89 %
12
13.33 %
10
11.11 %
14
15.56 %
England - LRA
Cumbria
PAR-NEW-IN
4
1,359
5.74 %
49
3.61 %
1214
89.33 %
108
7.95 %
96
7.06 %
0
0.00 %
Essex
PAR-NEW-IN
2
177
0.75 %
0
0.00 %
0
0.00 %
0
0.00 %
0
0.00 %
177
100.00 %
Lancashire
PAR-NEW-IN
1
75
0.32 %
2
2.67 %
72
96.00 %
2
2.67 %
1
1.33 %
0
0.00 %
Lincs
PAR-NEW-IN
3
400
1.69 %
7
1.75 %
381
95.25 %
12
3.00 %
12
3.00 %
0
0.00 %
Surrey
PAR-NEW-IN
2
439
1.85 %
22
5.01 %
304
69.25 %
18
4.10 %
16
3.64 %
97
22.10 %
Table 2a. Summary by County for January 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 January 2023 Cont.
Country
County
Submission
Reasons*
No.
subs
Samples
Gamma Positive
Gamma Negatives
Retest*
Resample
Reject
n
% of total
n
%
n
%
n
%
England
87
15554
65.64 %
575
3.70 %
12995
83.55 %
1024
6.58 %
897
5.77 %
1087
6.99 %
Wales - High TB
Carms
PAR-IR-EX
3
10
0.04 %
6
60.00 %
4
40.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-IR-SEV
2
27
0.11 %
17
62.96 %
6
22.22 %
4
14.81 %
4
14.81 %
0
0.00 %
PAR-PERSIS
3
115
0.49 %
0
0.00 %
104
90.43 %
10
8.70 %
8
6.96 %
3
2.61 %
PAR-RAPID
9
26
0.11 %
9
34.62 %
15
57.69 %
2
7.69 %
1
3.85 %
1
3.85 %
PAR-RECUR
1
122
0.51 %
18
14.75 %
98
80.33 %
6
4.92 %
6
4.92 %
0
0.00 %
Ceredigion
PAR-IR-EX
2
4
0.02 %
1
25.00 %
3
75.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-IR-SEV
2
4
0.02 %
4
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-RAPID
2
2
0.01 %
2
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
0
0.00 %
SER-FLEXI
4
50
0.21 %
14
28.00 %
32
64.00 %
7
14.00 %
4
8.00 %
0
0.00 %
Gwent
PAR-RAPID
2
2
0.01 %
0
0.00 %
2
100.00 %
1
50.00 %
0
0.00 %
0
0.00 %
PAR-RECUR
1
126
0.53 %
3
2.38 %
119
94.44 %
9
7.14 %
4
3.17 %
0
0.00 %
Pembs
PAR-IR-EX
7
16
0.07 %
8
50.00 %
6
37.50 %
2
12.50 %
2
12.50 %
0
0.00 %
PAR-IR-SEV
25
151
0.64 %
63
41.72 %
67
44.37 %
26
17.22 %
10
6.62 %
11
7.28 %
PAR-PERSIS
7
469
1.98 %
48
10.23 %
393
83.80 %
33
7.04 %
25
5.33 %
3
0.64 %
PAR-RAPID
12
51
0.22 %
11
21.57 %
37
72.55 %
4
7.84 %
3
5.88 %
0
0.00 %
PAR-RECUR
5
251
1.06 %
17
6.77 %
210
83.67 %
29
11.55 %
21
8.37 %
3
1.20 %
SER-FLEXI
7
364
1.54 %
23
6.32 %
314
86.26 %
33
9.07 %
27
7.42 %
0
0.00 %
Powys
PAR-IR-EX
1
4
0.02 %
0
0.00 %
4
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-IR-SEV
1
7
0.03 %
3
42.86 %
3
42.86 %
1
14.29 %
1
14.29 %
0
0.00 %
PAR-NEW-IN
2
152
0.64 %
13
8.55 %
131
86.18 %
10
6.58 %
8
5.26 %
0
0.00 %
PAR-PERSIS
2
3
0.01 %
0
0.00 %
1
33.33 %
1
33.33 %
1
33.33 %
1
33.33 %
PAR-POSTM
1
1
0.00 %
0
0.00 %
1
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-RAPID
1
1
0.00 %
1
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-RECUR
1
23
0.10 %
0
0.00 %
19
82.61 %
6
26.09 %
4
17.39 %
0
0.00 %
Wales - Intermediate TB
Carms
PAR-OTHER
3
253
1.07 %
43
17.00 %
195
77.08 %
15
5.93 %
14
5.53 %
1
0.40 %
PAR-RECUR
1
369
1.56 %
4
1.08 %
341
92.41 %
19
5.15 %
19
5.15 %
5
1.36 %
NE Wales
PAR-IR-EX
4
17
0.07 %
5
29.41 %
10
58.82 %
2
11.76 %
2
11.76 %
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 2a. Summary by County for January 2023 Cont.
Country
County
Submission
Reasons*
No.
subs
Samples
Gamma Positive
Gamma Negatives
Retest*
Resample
Reject
n
% of total
n
%
n
%
n
%
PAR-IR-SEV
1
19
0.08 %
2
10.53 %
16
84.21 %
1
5.26 %
1
5.26 %
0
0.00 %
PAR-NEW-IN
5
488
2.06 %
18
3.69 %
418
85.66 %
54
11.07 %
46
9.43 %
6
1.23 %
PAR-PERSIS
3
31
0.13 %
1
3.23 %
25
80.65 %
8
25.81 %
5
16.13 %
0
0.00 %
PAR-POSTM
5
16
0.07 %
2
12.50 %
12
75.00 %
3
18.75 %
2
12.50 %
0
0.00 %
PAR-RAPID
2
3
0.01 %
3
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-RECUR
1
56
0.24 %
1
1.79 %
50
89.29 %
6
10.71 %
5
8.93 %
0
0.00 %
SER-FLEXI
2
23
0.10 %
0
0.00 %
21
91.30 %
2
8.70 %
2
8.70 %
0
0.00 %
Powys
PAR-IR-SEV
1
1
0.00 %
1
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-NEW-IN
1
82
0.35 %
2
2.44 %
70
85.37 %
11
13.41 %
10
12.20 %
0
0.00 %
PAR-OTHER
1
1
0.00 %
0
0.00 %
1
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-RECUR
1
17
0.07 %
0
0.00 %
14
82.35 %
6
35.29 %
3
17.65 %
0
0.00 %
S Glamorgan
PAR-RAPID
1
1
0.00 %
0
0.00 %
1
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
Shropshire
PAR-PERSIS
2
5
0.02 %
0
0.00 %
5
100.00 %
1
20.00 %
0
0.00 %
0
0.00 %
Wales - Low TB
Gwynedd
PAR-NEW-IN
20
1,671
7.05 %
55
3.29 %
1501
89.83 %
135
8.08 %
112
6.70 %
3
0.18 %
PAR-OTHER
2
11
0.05 %
1
9.09 %
7
63.64 %
3
27.27 %
3
27.27 %
0
0.00 %
PAR-POSTM
2
2
0.01 %
0
0.00 %
2
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-RECUR
2
278
1.17 %
10
3.60 %
255
91.73 %
17
6.12 %
12
4.32 %
1
0.36 %
NE Wales
PAR-IR-EX
1
1
0.00 %
1
100.00 %
0
0.00 %
1
100.00 %
0
0.00 %
0
0.00 %
PAR-NEW-IN
10
1,696
7.16 %
47
2.77 %
1341
79.07 %
246
14.50 %
90
5.31 %
218
12.85 %
PAR-RAPID
2
4
0.02 %
0
0.00 %
3
75.00 %
1
25.00 %
1
25.00 %
0
0.00 %
SER-FLEXI
4
165
0.70 %
12
7.27 %
138
83.64 %
17
10.30 %
15
9.09 %
0
0.00 %
NW Wales
PAR-NEW-IN
1
23
0.10 %
0
0.00 %
22
95.65 %
1
4.35 %
1
4.35 %
0
0.00 %
Wales
181
7214
30.44 %
469
6.50 %
6017
83.41 %
733
10.16 %
472
6.54 %
256
3.55 %
Scotland - Scotland
Ayrshire
PAR-NEW-IN
1
191
0.81 %
4
2.09 %
169
88.48 %
18
9.42 %
14
7.33 %
4
2.09 %
West lothian
PAR-NEW-IN
1
84
0.35 %
1
1.19 %
62
73.81 %
8
9.52 %
8
9.52 %
13
15.48 %
Wigtown
PAR-NEW-IN
11
653
2.76 %
89
13.63 %
506
77.49 %
58
8.88 %
57
8.73 %
1
0.15 %
Scotland
13
928
3.92 %
94
10.13 %
737
79.42 %
84
9.05 %
79
8.51 %
18
1.94 %
Grand Total
Sum:
281
23696
1138
19749
1841
1448
1361
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 January 2023 Cont.
*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
Avon
PAR-RECUR
4
224
0.95 %
6
2.68 %
200
89.29 %
18
8.04 %
17
7.59 %
1
0.45 %
Corn & Scilly
PAR-RECUR
6
2,935
12.39 %
145
4.94 %
2593
88.35 %
217
7.39 %
197
6.71 %
0
0.00 %
Devon
PAR-CUL-N
1
2
0.01 %
0
0.00 %
1
50.00 %
1
50.00 %
1
50.00 %
0
0.00 %
PAR-RECUR
4
997
4.21 %
18
1.81 %
674
67.60 %
44
4.41 %
39
3.91 %
266
26.68 %
Dorset
PAR-RECUR
2
717
3.03 %
12
1.67 %
321
44.77 %
22
3.07 %
22
3.07 %
362
50.49 %
Gloucs
PAR-RECUR
1
438
1.85 %
21
4.79 %
396
90.41 %
24
5.48 %
21
4.79 %
0
0.00 %
Heref
PAR-RECUR
6
2,102
8.87 %
139
6.61 %
1836
87.35 %
145
6.90 %
127
6.04 %
0
0.00 %
Shropshire
PAR-RECUR
8
582
2.46 %
16
2.75 %
538
92.44 %
32
5.50 %
27
4.64 %
1
0.17 %
Somerset excl N
PAR-RECUR
2
353
1.49 %
11
3.12 %
329
93.20 %
14
3.97 %
12
3.40 %
1
0.28 %
Staffs
PAR-RECUR
7
969
4.09 %
22
2.27 %
835
86.17 %
92
9.49 %
83
8.57 %
29
2.99 %
Wiltshire
PAR-RECUR
2
167
0.70 %
3
1.80 %
158
94.61 %
11
6.59 %
6
3.59 %
0
0.00 %
England - Edge
Berks
PAR-NEW-IN
3
591
2.49 %
8
1.35 %
548
92.72 %
37
6.26 %
35
5.92 %
0
0.00 %
Bucks
PAR-NEW-IN
3
495
2.09 %
16
3.23 %
457
92.32 %
23
4.65 %
22
4.44 %
0
0.00 %
Cheshire
PAR-RECUR
2
215
0.91 %
2
0.93 %
201
93.49 %
15
6.98 %
12
5.58 %
0
0.00 %
Derbyshire
PAR-RECUR
4
978
4.13 %
31
3.17 %
881
90.08 %
72
7.36 %
66
6.75 %
0
0.00 %
Leics & Rut
PAR-NEW-IN
2
169
0.71 %
9
5.33 %
147
86.98 %
16
9.47 %
13
7.69 %
0
0.00 %
Northants
PAR-NEW-IN
5
772
3.26 %
16
2.07 %
590
76.42 %
57
7.38 %
48
6.22 %
118
15.28 %
Notts
PAR-NEW-IN
3
230
0.97 %
5
2.17 %
211
91.74 %
28
12.17 %
12
5.22 %
2
0.87 %
Oxon
PAR-RECUR
2
59
0.25 %
11
18.64 %
46
77.97 %
4
6.78 %
2
3.39 %
0
0.00 %
Warks
PAR-OTHER
1
19
0.08 %
0
0.00 %
0
0.00 %
0
0.00 %
0
0.00 %
19
100.00 %
PAR-RECUR
7
90
0.38 %
4
4.44 %
62
68.89 %
12
13.33 %
10
11.11 %
14
15.56 %
England - LRA
Cumbria
PAR-NEW-IN
4
1,359
5.74 %
49
3.61 %
1214
89.33 %
108
7.95 %
96
7.06 %
0
0.00 %
Essex
PAR-NEW-IN
2
177
0.75 %
0
0.00 %
0
0.00 %
0
0.00 %
0
0.00 %
177
100.00 %
Lancashire
PAR-NEW-IN
1
75
0.32 %
2
2.67 %
72
96.00 %
2
2.67 %
1
1.33 %
0
0.00 %
Lincs
PAR-NEW-IN
3
400
1.69 %
7
1.75 %
381
95.25 %
12
3.00 %
12
3.00 %
0
0.00 %
Surrey
PAR-NEW-IN
2
439
1.85 %
22
5.01 %
304
69.25 %
18
4.10 %
16
3.64 %
97
22.10 %
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
%
England
87
15554
65.64 %
575
3.70 %
12995
83.55 %
1024
6.58 %
897
5.77 %
1087
6.99 %
Wales - High TB
Carms
PAR-IR-EX
3
10
0.04 %
6
60.00 %
4
40.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-IR-SEV
2
27
0.11 %
17
62.96 %
6
22.22 %
4
14.81 %
4
14.81 %
0
0.00 %
PAR-PERSIS
3
115
0.49 %
0
0.00 %
104
90.43 %
10
8.70 %
8
6.96 %
3
2.61 %
PAR-RAPID
9
26
0.11 %
9
34.62 %
15
57.69 %
2
7.69 %
1
3.85 %
1
3.85 %
PAR-RECUR
1
122
0.51 %
18
14.75 %
98
80.33 %
6
4.92 %
6
4.92 %
0
0.00 %
Ceredigion
PAR-IR-EX
2
4
0.02 %
1
25.00 %
3
75.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-IR-SEV
2
4
0.02 %
4
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-RAPID
2
2
0.01 %
2
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
0
0.00 %
SER-FLEXI
4
50
0.21 %
14
28.00 %
32
64.00 %
7
14.00 %
4
8.00 %
0
0.00 %
Gwent
PAR-RAPID
2
2
0.01 %
0
0.00 %
2
100.00 %
1
50.00 %
0
0.00 %
0
0.00 %
PAR-RECUR
1
126
0.53 %
3
2.38 %
119
94.44 %
9
7.14 %
4
3.17 %
0
0.00 %
Pembs
PAR-IR-EX
7
16
0.07 %
8
50.00 %
6
37.50 %
2
12.50 %
2
12.50 %
0
0.00 %
PAR-IR-SEV
25
151
0.64 %
63
41.72 %
67
44.37 %
26
17.22 %
10
6.62 %
11
7.28 %
PAR-PERSIS
7
469
1.98 %
48
10.23 %
393
83.80 %
33
7.04 %
25
5.33 %
3
0.64 %
PAR-RAPID
12
51
0.22 %
11
21.57 %
37
72.55 %
4
7.84 %
3
5.88 %
0
0.00 %
PAR-RECUR
5
251
1.06 %
17
6.77 %
210
83.67 %
29
11.55 %
21
8.37 %
3
1.20 %
SER-FLEXI
7
364
1.54 %
23
6.32 %
314
86.26 %
33
9.07 %
27
7.42 %
0
0.00 %
Powys
PAR-IR-EX
1
4
0.02 %
0
0.00 %
4
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-IR-SEV
1
7
0.03 %
3
42.86 %
3
42.86 %
1
14.29 %
1
14.29 %
0
0.00 %
PAR-NEW-IN
2
152
0.64 %
13
8.55 %
131
86.18 %
10
6.58 %
8
5.26 %
0
0.00 %
PAR-PERSIS
2
3
0.01 %
0
0.00 %
1
33.33 %
1
33.33 %
1
33.33 %
1
33.33 %
PAR-POSTM
1
1
0.00 %
0
0.00 %
1
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-RAPID
1
1
0.00 %
1
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-RECUR
1
23
0.10 %
0
0.00 %
19
82.61 %
6
26.09 %
4
17.39 %
0
0.00 %
Wales - Intermediate TB
Carms
PAR-OTHER
3
253
1.07 %
43
17.00 %
195
77.08 %
15
5.93 %
14
5.53 %
1
0.40 %
PAR-RECUR
1
369
1.56 %
4
1.08 %
341
92.41 %
19
5.15 %
19
5.15 %
5
1.36 %
NE Wales
PAR-IR-EX
4
17
0.07 %
5
29.41 %
10
58.82 %
2
11.76 %
2
11.76 %
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-IR-SEV
1
19
0.08 %
2
10.53 %
16
84.21 %
1
5.26 %
1
5.26 %
0
0.00 %
PAR-NEW-IN
5
488
2.06 %
18
3.69 %
418
85.66 %
54
11.07 %
46
9.43 %
6
1.23 %
PAR-PERSIS
3
31
0.13 %
1
3.23 %
25
80.65 %
8
25.81 %
5
16.13 %
0
0.00 %
PAR-POSTM
5
16
0.07 %
2
12.50 %
12
75.00 %
3
18.75 %
2
12.50 %
0
0.00 %
PAR-RAPID
2
3
0.01 %
3
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-RECUR
1
56
0.24 %
1
1.79 %
50
89.29 %
6
10.71 %
5
8.93 %
0
0.00 %
SER-FLEXI
2
23
0.10 %
0
0.00 %
21
91.30 %
2
8.70 %
2
8.70 %
0
0.00 %
Powys
PAR-IR-SEV
1
1
0.00 %
1
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-NEW-IN
1
82
0.35 %
2
2.44 %
70
85.37 %
11
13.41 %
10
12.20 %
0
0.00 %
PAR-OTHER
1
1
0.00 %
0
0.00 %
1
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-RECUR
1
17
0.07 %
0
0.00 %
14
82.35 %
6
35.29 %
3
17.65 %
0
0.00 %
S Glamorgan
PAR-RAPID
1
1
0.00 %
0
0.00 %
1
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
Shropshire
PAR-PERSIS
2
5
0.02 %
0
0.00 %
5
100.00 %
1
20.00 %
0
0.00 %
0
0.00 %
Wales - Low TB
Gwynedd
PAR-NEW-IN
20
1,671
7.05 %
55
3.29 %
1501
89.83 %
135
8.08 %
112
6.70 %
3
0.18 %
PAR-OTHER
2
11
0.05 %
1
9.09 %
7
63.64 %
3
27.27 %
3
27.27 %
0
0.00 %
PAR-POSTM
2
2
0.01 %
0
0.00 %
2
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-RECUR
2
278
1.17 %
10
3.60 %
255
91.73 %
17
6.12 %
12
4.32 %
1
0.36 %
NE Wales
PAR-IR-EX
1
1
0.00 %
1
100.00 %
0
0.00 %
1
100.00 %
0
0.00 %
0
0.00 %
PAR-NEW-IN
10
1,696
7.16 %
47
2.77 %
1341
79.07 %
246
14.50 %
90
5.31 %
218
12.85 %
PAR-RAPID
2
4
0.02 %
0
0.00 %
3
75.00 %
1
25.00 %
1
25.00 %
0
0.00 %
SER-FLEXI
4
165
0.70 %
12
7.27 %
138
83.64 %
17
10.30 %
15
9.09 %
0
0.00 %
NW Wales
PAR-NEW-IN
1
23
0.10 %
0
0.00 %
22
95.65 %
1
4.35 %
1
4.35 %
0
0.00 %
Wales
181
7214
30.44 %
469
6.50 %
6017
83.41 %
733
10.16 %
472
6.54 %
256
3.55 %
Scotland - Scotland
Ayrshire
PAR-NEW-IN
1
191
0.81 %
4
2.09 %
169
88.48 %
18
9.42 %
14
7.33 %
4
2.09 %
West lothian
PAR-NEW-IN
1
84
0.35 %
1
1.19 %
62
73.81 %
8
9.52 %
8
9.52 %
13
15.48 %
Wigtown
PAR-NEW-IN
11
653
2.76 %
89
13.63 %
506
77.49 %
58
8.88 %
57
8.73 %
1
0.15 %
Scotland
13
928
3.92 %
94
10.13 %
737
79.42 %
84
9.05 %
79
8.51 %
18
1.94 %
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
%
Grand Total
Sum:
281
23696
1138
19749
1841
1448
1361
*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 January 2023
Country
Protocol
No
submissions Samples
Positive
Negatives
Retest*
Resample
Reject
n
% of total n
%
n
%
n
%
n
%
n
%
England
Parallel
87
15554
100.0%
575
3.7%
12995
83.5%
1024
6.6%
897
5.8%
1087
7.0%
Serial/Extended
0
0
0.0 %
0
0.0 %
0
0.0 %
0
0.0 %
0
0.0 %
0
0.0 %
Total
87
15554
100.0%
575
3.7%
12995
83.5%
1024
6.6%
897
5.8%
1087
7.0%
Scotland
Parallel
13
928
100.0%
94
10.1%
737
79.4%
84
9.1%
79
8.5%
18
1.9%
Serial/Extended
0
0
0.0 %
0
0.0 %
0
0.0 %
0
0.0 %
0
0.0 %
0
0.0 %
Total
13
928
100.0%
94
10.1%
737
79.4%
84
9.1%
79
8.5%
18
1.9%
Wales
Parallel
164
6612
91.7%
420
6.4%
5512
83.4%
674
10.2%
424
6.4%
256
3.9%
Serial/Extended
17
602
8.3%
49
8.1%
505
83.9%
59
9.8%
48
8.0%
0
0.0 %
Total
181
7214
100.0%
469
6.5%
6017
83.4%
733
10.2%
472
6.5%
256
3.5%
GB
Parallel
264
23094
97.5%
1089
4.7%
19244
83.3%
1782
7.7%
1400
6.1%
1361
5.9%
Serial/Extended
17
602
2.5%
49
8.1%
505
83.9%
59
9.8%
48
8.0%
0
0.0 %
Total
281
23696
100.0%
1138
4.8%
19749
83.3%
1841
7.8%
1448
6.1%
1361
5.7%
87.00
181.00
13.00
* 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
87
15554
100.0%
575
3.7%
12995
83.5%
1024
6.6%
897
5.8%
1087
7.0%
Serial/Extended
0
0
0.0 %
0
0.0 %
0
0.0 %
0
0.0 %
0
0.0 %
0
0.0 %
Total
87
15554
100.0%
575
3.7%
12995
83.5%
1024
6.6%
897
5.8%
1087
7.0%
Scotland
Parallel
13
928
100.0%
94
10.1%
737
79.4%
84
9.1%
79
8.5%
18
1.9%
Serial/Extended
0
0
0.0 %
0
0.0 %
0
0.0 %
0
0.0 %
0
0.0 %
0
0.0 %
Total
13
928
100.0%
94
10.1%
737
79.4%
84
9.1%
79
8.5%
18
1.9%
Wales
Parallel
164
6612
91.7%
420
6.4%
5512
83.4%
674
10.2%
424
6.4%
256
3.9%
Serial/Extended
17
602
8.3%
49
8.1%
505
83.9%
59
9.8%
48
8.0%
0
0.0 %
Total
181
7214
100.0%
469
6.5%
6017
83.4%
733
10.2%
472
6.5%
256
3.5%
GB
Parallel
264
23094
97.5%
1089
4.7%
19244
83.3%
1782
7.7%
1400
6.1%
1361
5.9%
Serial/Extended
17
602
2.5%
49
8.1%
505
83.9%
59
9.8%
48
8.0%
0
0.0 %
Total
281
23696
100.0%
1138
4.8%
19749
83.3%
1841
7.8%
1448
6.1%
1361
5.7%
87.00
181.00
13.00
* 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
17
602
2.5%
49
8.1%
505
83.9%
59
9.8 %
48
8.0 %
0
Parallel - IRs in Exit Strategy for persistent her
18
52
0.2%
21
40.4%
27
51.9%
5
9.6 %
4
7.7 %
0
Parallel New Infection
80
9747
41.1%
363
3.7%
8144
83.6%
842
8.6 %
601
6.2 %
639
6.6 %
Parallel - new infection cull area
1
2
0.0%
0
0.0 %
1
50.0%
1
50.0 %
1
50.0 %
0
Parallel - Other
7
284
1.2%
44
15.5%
203
71.5%
18
6.3 %
17
6.0 %
20
7.0 %
Parallel Persistent Infection
17
623
2.6%
49
7.9%
528
84.8%
53
8.5 %
39
6.3 %
7
1.1 %
Parallel – post-mvt test coupled with IDEXX an
8
19
0.1%
2
10.5%
15
78.9%
3
15.8 %
2
10.5 %
0
Parallel - Rapid Testing Two-times IRs
31
90
0.4%
26
28.9%
58
64.4%
8
8.9 %
5
5.6 %
1
1.1 %
Parallel - Recurrent breakdowns
70
12068
50.9%
494
4.1%
10176
84.3%
820
6.8 %
715
5.9 %
683
5.7 %
Parallel - severe IRs - in persistent herds
32
209
0.9%
90
43.1%
92
44.0%
32
15.3 %
16
7.7 %
11
5.3 %
Total
281
23696
100.0%
1138
4.8%
19749
83.3%
1841
7.8 %
1448
6.1 %
1361
5.7 %
Table 4a. Summaryof IFN Gamma results by submission reason (January 2023)
England - HRA
Parallel - new infection cull area
1
2
0.0%
0
0.0 %
1
50.0%
1
50.0 %
1
50.0 %
0
Parallel - Recurrent breakdowns
42
9484
40.0%
393
4.1%
7880
83.1%
619
6.5 %
551
5.8 %
660
7.0 %
England - HRA
43
9486
40.0%
393
4.1%
7881
83.1%
620
6.5 %
552
5.8 %
660
7.0 %
England - Edge
Parallel New Infection
16
2257
9.5%
54
2.4%
1953
86.5%
161
7.1 %
130
5.8 %
120
5.3 %
Parallel - Other
1
19
0.1%
0
0.0 %
0
0.0 %
0
0
19
100.0 %
Parallel - Recurrent breakdowns
15
1342
5.7%
48
3.6%
1190
88.7%
103
7.7 %
90
6.7 %
14
1.0 %
England - Edge
32
3618
15.3%
102
2.8%
3143
86.9%
264
7.3 %
220
6.1 %
153
4.2 %
England - LRA
Parallel New Infection
12
2450
10.3%
80
3.3%
1971
80.4%
140
5.7 %
125
5.1 %
274
11.2 %
England - LRA
12
2450
10.3%
80
3.3%
1971
80.4%
140
5.7 %
125
5.1 %
274
11.2 %
Wales - High TB
Extended Flexible IFN-GAMMA test
11
414
1.7%
37
8.9%
346
83.6%
40
9.7 %
31
7.5 %
0
Parallel - IRs in Exit Strategy for persistent her
13
34
0.1%
15
44.1%
17
50.0%
2
5.9 %
2
5.9 %
0
Parallel New Infection
2
152
0.6%
13
8.6%
131
86.2%
10
6.6 %
8
5.3 %
0
Parallel Persistent Infection
12
587
2.5%
48
8.2%
498
84.8%
44
7.5 %
34
5.8 %
7
1.2 %
Parallel – post-mvt test coupled with IDEXX an
1
1
0.0%
0
0.0 %
1
100.0%
0
0
0
Parallel - Rapid Testing Two-times IRs
26
82
0.3%
23
28.0%
54
65.9%
7
8.5 %
4
4.9 %
1
1.2 %
Parallel - Recurrent breakdowns
8
522
2.2%
38
7.3%
446
85.4%
50
9.6 %
35
6.7 %
3
0.6 %
Parallel - severe IRs - in persistent herds
30
189
0.8%
87
46.0%
76
40.2%
31
16.4 %
15
7.9 %
11
5.8 %
Wales - High TB
103
1981
8.4%
261
13.2%
1569
79.2%
184
9.3 %
129
6.5 %
22
1.1 %
Wales - Intermediate TB
Extended Flexible IFN-GAMMA test
2
23
0.1%
0
0.0 %
21
91.3%
2
8.7 %
2
8.7 %
0
Parallel - IRs in Exit Strategy for persistent her
4
17
0.1%
5
29.4%
10
58.8%
2
11.8 %
2
11.8 %
0
Parallel New Infection
6
570
2.4%
20
3.5%
488
85.6%
65
11.4 %
56
9.8 %
6
1.1 %
Parallel - Other
4
254
1.1%
43
16.9%
196
77.2%
15
5.9 %
14
5.5 %
1
0.4 %
Parallel Persistent Infection
5
36
0.2%
1
2.8%
30
83.3%
9
25.0 %
5
13.9 %
0
Parallel – post-mvt test coupled with IDEXX an
5
16
0.1%
2
12.5%
12
75.0%
3
18.8 %
2
12.5 %
0
Parallel - Rapid Testing Two-times IRs
3
4
0.0%
3
75.0%
1
25.0%
0
0
0
Parallel - Recurrent breakdowns
3
442
1.9%
5
1.1%
405
91.6%
31
7.0 %
27
6.1 %
5
1.1 %
Parallel - severe IRs - in persistent herds
2
20
0.1%
3
15.0%
16
80.0%
1
5.0 %
1
5.0 %
0
Wales - Intermediate TB
34
1382
5.8%
82
5.9%
1179
85.3%
128
9.3 %
109
7.9 %
12
0.9 %
Wales - Low TB
Extended Flexible IFN-GAMMA test
4
165
0.7%
12
7.3%
138
83.6%
17
10.3 %
15
9.1 %
0
Parallel - IRs in Exit Strategy for persistent her
1
1
0.0%
1
100.0%
0
0.0 %
1
100.0 %
0
0
Parallel New Infection
31
3390
14.3%
102
3.0%
2864
84.5%
382
11.3 %
203
6.0 %
221
6.5 %
Parallel - Other
2
11
0.0%
1
9.1%
7
63.6%
3
27.3 %
3
27.3 %
0
Parallel – post-mvt test coupled with IDEXX an
2
2
0.0%
0
0.0 %
2
100.0%
0
0
0
Parallel - Rapid Testing Two-times IRs
2
4
0.0%
0
0.0 %
3
75.0%
1
25.0 %
1
25.0 %
0
Parallel - Recurrent breakdowns
2
278
1.2%
10
3.6%
255
91.7%
17
6.1 %
12
4.3 %
1
0.4 %
Wales - Low TB
44
3851
16.3%
126
3.3%
3269
84.9%
421
10.9 %
234
6.1 %
222
5.8 %
Scotland - Scotland
Parallel New Infection
13
928
3.9%
94
10.1%
737
79.4%
84
9.1 %
79
8.5 %
18
1.9 %
Scotland - Scotland
13
928
3.9%
94
10.1%
737
79.4%
84
9.1 %
79
8.5 %
18
1.9 %

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
17
602
2.5%
49
8.1%
505
83.9%
59
9.8 %
48
8.0 %
0
Parallel - IRs in Exit Strategy for persistent herds
18
52
0.2%
21
40.4%
27
51.9%
5
9.6 %
4
7.7 %
0
Parallel New Infection
80
9747
41.1%
363
3.7%
8144
83.6%
842
8.6 %
601
6.2 %
639
6.6 %
Parallel - new infection cull area
1
2
0.0%
0
0.0 %
1
50.0%
1
50.0 %
1
50.0 %
0
Parallel - Other
7
284
1.2%
44
15.5%
203
71.5%
18
6.3 %
17
6.0 %
20
7.0 %
Parallel Persistent Infection
17
623
2.6%
49
7.9%
528
84.8%
53
8.5 %
39
6.3 %
7
1.1 %
Parallel – post-mvt test coupled with IDEXX anti
8
19
0.1%
2
10.5%
15
78.9%
3
15.8 %
2
10.5 %
0
Parallel - Rapid Testing Two-times IRs
31
90
0.4%
26
28.9%
58
64.4%
8
8.9 %
5
5.6 %
1
1.1 %
Parallel - Recurrent breakdowns
70
12068
50.9%
494
4.1%
10176
84.3%
820
6.8 %
715
5.9 %
683
5.7 %
Parallel - severe IRs - in persistent herds
32
209
0.9%
90
43.1%
92
44.0%
32
15.3 %
16
7.7 %
11
5.3 %
Total
281
23696
100.0%
1138
4.8%
19749
83.3%
1841
7.8 %
1448
6.1 %
1361
5.7 %
Table 4b. Summary of IFN Gamma results by submission reason (Total 2023)
England - HRA
Parallel - new infection cull area
1
2
0.0%
0
0.0 %
1
50.0%
1
50.0 %
1
50.0 %
0
Parallel - Recurrent breakdowns
42
9484
40.0%
393
4.1%
7880
83.1%
619
6.5 %
551
5.8 %
660
7.0 %
England - Edge
Parallel New Infection
16
2257
9.5%
54
2.4%
1953
86.5%
161
7.1 %
130
5.8 %
120
5.3 %
Parallel - Other
1
19
0.1%
0
0.0 %
0
0.0 %
0
0
19
100.0 %
Parallel - Recurrent breakdowns
15
1342
5.7%
48
3.6%
1190
88.7%
103
7.7 %
90
6.7 %
14
1.0 %
England - LRA
Parallel New Infection
12
2450
10.3%
80
3.3%
1971
80.4%
140
5.7 %
125
5.1 %
274
11.2 %
England
87
15554
65.6%
575
3.7%
12995
83.5%
1024
6.6 %
897
5.8 %
1087
7.0 %
Wales - High TB
Extended Flexible IFN-GAMMA test
11
414
1.7%
37
8.9%
346
83.6%
40
9.7 %
31
7.5 %
0
Parallel - IRs in Exit Strategy for persistent herd
13
34
0.1%
15
44.1%
17
50.0%
2
5.9 %
2
5.9 %
0
Parallel New Infection
2
152
0.6%
13
8.6%
131
86.2%
10
6.6 %
8
5.3 %
0
Parallel Persistent Infection
12
587
2.5%
48
8.2%
498
84.8%
44
7.5 %
34
5.8 %
7
1.2 %
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
26
82
0.3%
23
28.0%
54
65.9%
7
8.5 %
4
4.9 %
1
1.2 %
Parallel - Recurrent breakdowns
8
522
2.2%
38
7.3%
446
85.4%
50
9.6 %
35
6.7 %
3
0.6 %
Parallel - severe IRs - in persistent herds
30
189
0.8%
87
46.0%
76
40.2%
31
16.4 %
15
7.9 %
11
5.8 %

Table 4b. Summary of IFN Gamma results by submission reason (Total 2023) Cont.
Wales - Intermediate TB
Extended Flexible IFN-GAMMA test
2
23
0.1%
0
0.0 %
21
91.3%
2
8.7 %
2
8.7 %
0
Parallel - IRs in Exit Strategy for persistent herd
4
17
0.1%
5
29.4%
10
58.8%
2
11.8 %
2
11.8 %
0
Parallel New Infection
6
570
2.4%
20
3.5%
488
85.6%
65
11.4 %
56
9.8 %
6
1.1 %
Parallel - Other
4
254
1.1%
43
16.9%
196
77.2%
15
5.9 %
14
5.5 %
1
0.4 %
Parallel Persistent Infection
5
36
0.2%
1
2.8%
30
83.3%
9
25.0 %
5
13.9 %
0
Parallel – post-mvt test coupled with IDEXX ant
5
16
0.1%
2
12.5%
12
75.0%
3
18.8 %
2
12.5 %
0
Parallel - Rapid Testing Two-times IRs
3
4
0.0%
3
75.0%
1
25.0%
0
0
0
Parallel - Recurrent breakdowns
3
442
1.9%
5
1.1%
405
91.6%
31
7.0 %
27
6.1 %
5
1.1 %
Parallel - severe IRs - in persistent herds
2
20
0.1%
3
15.0%
16
80.0%
1
5.0 %
1
5.0 %
0
Wales - Low TB
Extended Flexible IFN-GAMMA test
4
165
0.7%
12
7.3%
138
83.6%
17
10.3 %
15
9.1 %
0
Parallel - IRs in Exit Strategy for persistent herd
1
1
0.0%
1
100.0%
0
0.0 %
1
100.0 %
0
0
Parallel New Infection
31
3390
14.3%
102
3.0%
2864
84.5%
382
11.3 %
203
6.0 %
221
6.5 %
Parallel - Other
2
11
0.0%
1
9.1%
7
63.6%
3
27.3 %
3
27.3 %
0
Parallel – post-mvt test coupled with IDEXX ant
2
2
0.0%
0
0.0 %
2
100.0%
0
0
0
Parallel - Rapid Testing Two-times IRs
2
4
0.0%
0
0.0 %
3
75.0%
1
25.0 %
1
25.0 %
0
Parallel - Recurrent breakdowns
2
278
1.2%
10
3.6%
255
91.7%
17
6.1 %
12
4.3 %
1
0.4 %
Wales
181
7214
30.4%
469
6.5%
6017
83.4%
733
10.2 %
472
6.5 %
256
3.5 %
Scotland - Scotland
Parallel New Infection
13
928
3.9%
94
10.1%
737
79.4%
84
9.1 %
79
8.5 %
18
1.9 %
Scotland
13
928
3.9%
94
10.1%
737
79.4%
84
9.1 %
79
8.5 %
18
1.9 %

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
2022 February
229
18198
132
966
1
19
0
0
0
0
84
3
0
3
0
765
0
91
0
0
March
268
23046
165
1108
35
0
0
0
0
60
4
0
14
0
929
0
65
1
0
April
220
15067
130
687
9
0
0
0
0
50
2
0
11
0
563
0
52
0
0
May
269
23949
158
918
2
19
0
0
0
0
62
3
0
9
0
778
0
44
1
0
June
213
17755
114
590
19
0
0
0
0
48
1
0
2
0
460
1
57
2
0
July
248
15402
109
485
4
0
0
0
0
46
1
2
3
0
382
1
46
0
0
August
274
19758
144
758
12
0
0
0
0
36
3
0
14
0
642
0
47
1
2
September
205
xx-xxxx-xxxx
107
672
13
0
0
0
0
100
0
1
7
0
519
0
31
0
0
October
180
xx-xxxx-xxxx
100
620
12
0
0
0
0
66
0
0
21
0
495
2
24
0
0
November
201
15848
120
673
17
0
0
0
0
60
0
2
12
1
503
1
70
0
7
December
200
13735
109
545
40
0
0
0
0
25
0
0
2
8
424
15
0
0
26
2023 January
281
23696
176
1138
252
500
0
0
0
0
37
0
0
0
5
248
3
0
0
30
Totals (last
12 months)
2788
219294
1564
9160
255
699
0
0
0
0
674
17
5
98
14
6708
23
527
5
65
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
1080
154366
726
5516
401
0
0
0
0
609
4
3
25
2
4233
1
14
0
0
Scotland
48
5355
31
220
48
0
0
0
0
35
1
2
3
4
110
1
1
0
4
Wales
1660
59573
807
3424
250
0
0
0
0
30
12
0
70
8
2365
21
512
5
61
Totals
2788
219294
1564
9160
699
0
0
0
0
674
17
5
98
14
6708
23
527
5
65
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.
142
233
117
235
163
256
156
211
143
214
147
208
134
164
145
167
144
130
136
140
134
195
100
138
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
0
50
100
150
200
250
300
350
400
450
January
February
March
April
May
June
July
August
September
October
November
December
January
February
March
April
May
June
July
August
September
October
November
December
January
2021
2022
2023
IFNg Positive herds
IFNg Negative herds
25840
1653
26496
1637
33735
1867
26079
1571
25277
1561
26185
1314
23382
1077
16764
912
14734
889
18674
814
24089
1349
12181
759
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
0
5000
10000
15000
20000
25000
30000
35000
40000
January
February
March
April
May
June
July
August
September
October
November
December
January
February
March
April
May
June
July
August
September
October
November
December
January
2021
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
9
January
February
March
April
May
June
July
August
September
October
November
December
January
February
March
April
May
June
July
August
September
October
November
December
January
2021
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
5
10
15
20
25
Wiltshire
West lothian
Surrey
Somerset excl N
S Glamorgan
Pembs
NW Wales
Northants
Lincs
Lancashire
Gwynedd
Gloucs
Dorset
Derbyshire
Corn & Scilly
Ceredigion
Bucks
Ayrshire
%Retested
%Resampled
Figure 6. Proportion of samples retested, or requiring a resample, during January 2023 (% submission per
County)
County
%Resampled %Retested
Avon
7.59 %
8.04 %
Ayrshire
7.33 %
9.42 %
Berks
5.92 %
6.26 %
Bucks
4.44 %
4.65 %
Carms
5.64 %
6.07 %
Ceredigion
6.67 %
11.67 %
Cheshire
5.58 %
6.98 %
Corn & Scilly
6.71 %
7.39 %
Cumbria
7.06 %
7.95 %
Derbyshire
6.75 %
7.36 %
Devon
4.00 %
4.50 %
Dorset
3.07 %
3.07 %
Essex
Gloucs
4.79 %
5.48 %
Gwent
3.13 %
7.81 %
Gwynedd
6.47 %
7.90 %
Heref
6.04 %
6.90 %
Lancashire
1.33 %
2.67 %
Leics & Rut
7.69 %
9.47 %
Lincs
3.00 %
3.00 %
NE Wales
6.71 %
13.54 %
Northants
6.22 %
7.38 %
Notts
5.22 %
12.17 %
NW Wales
4.35 %
4.35 %
Oxon
3.39 %
6.78 %
Pembs
6.76 %
9.75 %
Powys
9.25 %
11.99 %
S Glamorgan
Shropshire
4.60 %
5.62 %
Somerset excl
3.40 %
3.97 %
Staffs
8.57 %
9.49 %
Surrey
3.64 %
4.10 %
Warks
9.17 %
11.01 %
West lothian
9.52 %
9.52 %
Wigtown
8.73 %
8.88 %

Wiltshire
3.59 %
6.59 %

Country
No.
animals
No of IFNg+
animals
% Positive
animals
No. samples
No of IFNg+
samples
% Positive
samples
England
15094
575
3.8%
15554
575
3.7%
Wales
7017
469
6.7%
7214
469
6.5%
Scotland
905
94
10.4%
928
94
10.1%
GB
23015
1138
4.9%
23696
1138
4.8%
Table 6a (i): Number of animals and submissions tested in January 2023
Country
No.
animals
No of IFNg+
animals
% Positive
animals
No. samples
No of IFNg+
samples
% Positive
samples
England
15094
575
3.8%
15554
575
3.7%
Wales
7017
469
6.7%
7214
469
6.5%
Scotland
905
94
10.4%
928
94
10.1%
GB
23015
1138
4.9%
23696
1138
4.8%
Table 6b (i): Number of animals and submissions tested in 2023 Up to end of January
Country
No.
animals
No of IFNg+
animals
% Positive
animals
No. samples
No of IFNg+
samples
% Positive
samples
England
14814
609
4.1%
15074
609
4.0%
Wales
3286
243
7.4%
3487
243
7.0%
Scotland
2
0
0.0 %
2
0.0 %
GB
18102
852
4.7%
18563
852
4.6%
Table 6a (ii): Number of animals and submissions tested in January 2022
Table 6b (ii): Number of animals and submissions tested in 2022 Up to end of January
Country
No.
animals
No of IFNg+
animals
% Positive
animals
No. samples
No of IFNg+
samples
% Positive
samples
England
14814
609
4.1%
15074
609
4.0%
Wales
3286
243
7.4%
3487
243
7.0%
Scotland
2
0
0.0 %
2
0.0 %
GB
18102
852
4.7%
18563
852
4.6%

* Test type
Num
Submissions
Num Samples Num Positives
Private
% Positive
Devon
PRV-SE
1
61
3
4.92 %
Shropshire
PRV-SP
2
2
0
0
Total
3
63
3
4.76 %
*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 January 2023
Table 7b Number of private samples 2023
* Test type
Num
Submissions
Num
Samples
Num
Positives
Private
% Positive
Devon
PRV-SE
1
61
3
4.92 %
Shropshire
PRV-SP
2
2
0
0
Total
3
63
3
4.76 %

Country
County
Test Reason
Num
Submissions
Num Samples
Tested
Num Positive
Samples
% Positive
England
Northern Somerset &
South
Gloucestershire
BOV-P
1
5
0
0
England
1
5
0
0
Wales
Carmarthenshire
BOV-IR-C
2
32
9
28.1%
Ceredigion
BOV-IR-C
3
21
4
19.0%
BOV-IR-EX
1
3
0
0
North East Wales
BOV-IR-EX
1
7
0
0
BOV-P
1
14
0
0
BOV-POSTM
3
13
2
15.4%
Pembrokeshire
BOV-IR-C
18
192
22
11.5%
BOV-IR-EX
2
31
5
16.1%
BOV-OTHER
3
328
6
1.8%
Powys
BOV-IR-C
4
16
2
12.5%
Wales
38
657
50
7.6%
All GB
39
662
50
7.6 %
Table 8a Number of Cattle Antibody Tests January 2023
Table 8b Number of Cattle Antibody Tests 2023
Country
County
Test Reason
Num Submissions Num Samples Tested Num Positive Samples % Positive
England
Northern Somerset &
South
Gloucestershire
BOV-P
1
5
0
0
England
1
5
0
0
Wales
Carmarthenshire
BOV-IR-C
2
32
9
28.1%
Ceredigion
BOV-IR-C
3
21
4
19.0%
BOV-IR-EX
1
3
0
0
North East Wales
BOV-IR-EX
1
7
0
0
BOV-P
1
14
0
0
BOV-POSTM
3
13
2
15.4%
Pembrokeshire
BOV-IR-C
18
192
22
11.5%
BOV-IR-EX
2
31
5
16.1%
BOV-OTHER
3
328
6
1.8%
Powys
BOV-IR-C
4
16
2
12.5%
Wales
38
657
50
7.6%
All GB
39
662
50
7.6 %