Monthly Report: Surveillance Project SB4008 IFNg (TC0651 and TC0751) & Antibody (TC0077) tests for bovine tuberculosis- June 2024
Source: environment.data.gov.uk (2025-04-29)

Interferon-Gamma Testing for Bovine Tuberculosis - Monthly Reports from January 2024. 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
Issued 09 July 2024
214
1st June 2024 - 30th June 2024

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
June 2024
%
Total 2024
%
Submissions
197
1347
Samples
Total (%)
18101
100.00 %
114862
100.00 %
England
11620
64.20 %
74444
64.81 %
Wales
6481
35.80 %
39301
34.22 %
Scotland
1117
0.97 %
Parallel Tests
PAR-CHR
169
0.93 %
1038
0.90 %
PAR-CUL-N
1
0.01 %
382
0.33 %
PAR-CUL-P
262
1.45 %
2944
2.56 %
PAR-HERD-S
0
0.00 %
44
0.04 %
PAR-IR-EX
37
0.20 %
207
0.18 %
PAR-IR-SEV
283
1.56 %
1812
1.58 %
PAR-NEW-IN
5013
27.69 %
23487
20.45 %
PAR-OTHER
651
3.60 %
3882
3.38 %
PAR-PERSIS
3204
17.70 %
22881
19.92 %
PAR-POSTM
0
0.00 %
PAR-RAPID
54
0.30 %
423
0.37 %
PAR-RECUR
7786
43.01 %
53737
46.78 %
Total(% of all samples)
17460
96.46 %
110837
96.50 %
Serial/Extended Tests
SER-ANOM
0
0.00 %
SER-FLEXI
641
3.54 %
3757
3.27 %
SER-FRAUD
0
0.00 %
SER-NSR
0
0.00 %
SER-OTHER
0
0.00 %
268
0.23 %
Total(% of all samples)
641
3.54 %
4025
3.50 %
Total
18101
100.00 %
114862
100.00 %
Retests
Total (% of all samples)
906
5.01 %
8289
7.22 %
England
630
3.48 %
5703
4.97 %
Wales
276
1.52 %
2471
2.15 %
Scotland
115
0.10 %
Resamples
Total (% of all samples)
646
3.57 %
7011
6.10 %
England
467
2.58 %
4889
4.26 %
Wales
179
0.99 %
2023
1.76 %
Scotland
99
0.09 %
Rejects
Total (% of all samples)
64
0.35 %
1180
1.03 %
England
54
0.30 %
976
0.85 %
Wales
10
0.06 %
201
0.17 %
Scotland
0
0.00 %
3
0.00 %
Table 1. Monthly Totals for June 2024
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-N
PAR-CUL-P
PAR-IR-EX
PAR-IR-SEV
PAR-NEW-IN
PAR-OTHER
PAR-PERSIS
PAR-RAPID
PAR-RECUR
SER-FLEXI
Breakdown of
Reason for
submission
PAR-CHR
169
0.9 %
PAR-CUL-N
1
0.0 %
PAR-CUL-P
262
1.4 %
PAR-IR-EX
37
0.2 %
PAR-IR-SEV
283
1.6 %
PAR-NEW-IN
5013
27.7 %
PAR-OTHER
651
3.6 %
PAR-PERSIS
3204
17.7 %
PAR-RAPID
54
0.3 %
PAR-RECUR
7786
43.0 %
SER-FLEXI
641
3.5 %
Total
18101
100.00 %
Figure 1. Number of samples submitted in each category during June 2024
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
S Glamorgan
Powys
Pembs
NE Wales
Mid Glamorgan
Gwynedd
Gwent
Ceredigion
Carms
W Sussex
Wiltshire
Warks
Staffs
Somerset excl N
Shropshire
Oxon
Northants
Lincs
Leics & Rut
Heref
Hampshire
Gloucs
Dorset
Devon
Derbyshire
Cumbria
Corn & Scilly
Cheshire
Bucks
Avon
Wales
England
SER-FLEXI
PAR-RECUR
PAR-RAPID
PAR-PERSIS
PAR-OTHER
PAR-NEW-IN
PAR-IR-SEV
PAR-IR-EX
PAR-CUL-P
PAR-CUL-N
PAR-CHR
Breakdown of
Samples
submitted by
County
Figure 2. Number of samples submitted in each category by County during June 2024
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
2000
4000
6000
8000
10000
12000
14000
Wigtown
West lothian
Ayrshire
S Wales
S Glamorgan
Powys
Pembs
NE Wales
Mid Glamorgan
Gwynedd
Gwent
Conwy
Ceredigion
Carms
W Sussex
Wiltshire
Warks
Staffs
Somerset excl N
Shropshire
Oxon
N Yorks
Notts
Northants
Norfolk
Lincs
Leics & Rut
Lancashire
Kent
Humberside
Herts
Heref
Hampshire
Gloucs
E Sussex
Durham
Dorset
Devon
Derbyshire
Cumbria
Corn & Scilly
Cheshire
Bucks
Berks
Beds
Avon
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-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 2024
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
2
301
1.66 %
27
8.97 %
264
87.71 %
13
4.32 %
10
3.32 %
0
0.00 %
Corn & Scilly
PAR-RECUR
7
1,005
5.55 %
61
6.07 %
911
90.65 %
42
4.18 %
33
3.28 %
0
0.00 %
Devon
PAR-CUL-N
1
1
0.01 %
0
0.00 %
1
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-PERSIS
3
651
3.60 %
26
3.99 %
617
94.78 %
13
2.00 %
8
1.23 %
0
0.00 %
PAR-RECUR
11
2,097
11.58 %
43
2.05 %
1949
92.94 %
145
6.91 %
105
5.01 %
0
0.00 %
Dorset
PAR-CUL-P
1
6
0.03 %
0
0.00 %
6
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
Gloucs
PAR-RECUR
2
527
2.91 %
9
1.71 %
507
96.20 %
24
4.55 %
11
2.09 %
0
0.00 %
Heref
PAR-PERSIS
1
11
0.06 %
0
0.00 %
9
81.82 %
3
27.27 %
2
18.18 %
0
0.00 %
PAR-RECUR
5
76
0.42 %
10
13.16 %
60
78.95 %
6
7.89 %
6
7.89 %
0
0.00 %
Shropshire
PAR-CUL-P
1
13
0.07 %
0
0.00 %
12
92.31 %
1
7.69 %
1
7.69 %
0
0.00 %
PAR-OTHER
1
6
0.03 %
3
50.00 %
3
50.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-RECUR
5
982
5.43 %
12
1.22 %
943
96.03 %
38
3.87 %
27
2.75 %
0
0.00 %
Somerset excl N
PAR-CUL-P
2
243
1.34 %
19
7.82 %
212
87.24 %
15
6.17 %
12
4.94 %
0
0.00 %
PAR-RECUR
5
300
1.66 %
11
3.67 %
279
93.00 %
9
3.00 %
7
2.33 %
3
1.00 %
Staffs
PAR-CHR
2
169
0.93 %
3
1.78 %
157
92.90 %
13
7.69 %
9
5.33 %
0
0.00 %
PAR-RECUR
4
1,012
5.59 %
47
4.64 %
922
91.11 %
47
4.64 %
43
4.25 %
0
0.00 %
Wiltshire
PAR-RECUR
5
633
3.50 %
63
9.95 %
527
83.25 %
56
8.85 %
43
6.79 %
0
0.00 %
England - Edge
Bucks
PAR-NEW-IN
2
171
0.94 %
10
5.85 %
158
92.40 %
7
4.09 %
3
1.75 %
0
0.00 %
PAR-RECUR
1
113
0.62 %
4
3.54 %
105
92.92 %
6
5.31 %
4
3.54 %
0
0.00 %
Cheshire
PAR-OTHER
2
364
2.01 %
24
6.59 %
331
90.93 %
11
3.02 %
9
2.47 %
0
0.00 %
Derbyshire
PAR-NEW-IN
1
5
0.03 %
1
20.00 %
2
40.00 %
2
40.00 %
2
40.00 %
0
0.00 %
PAR-RECUR
1
15
0.08 %
1
6.67 %
10
66.67 %
4
26.67 %
4
26.67 %
0
0.00 %
Hampshire
PAR-NEW-IN
1
247
1.36 %
1
0.40 %
237
95.95 %
14
5.67 %
9
3.64 %
0
0.00 %
Leics & Rut
PAR-NEW-IN
5
739
4.08 %
12
1.62 %
665
89.99 %
83
11.23 %
62
8.39 %
0
0.00 %
Northants
PAR-NEW-IN
4
300
1.66 %
5
1.67 %
285
95.00 %
16
5.33 %
10
3.33 %
0
0.00 %
Oxon
PAR-NEW-IN
1
159
0.88 %
4
2.52 %
147
92.45 %
9
5.66 %
8
5.03 %
0
0.00 %
Table 2a. Summary by County for June 2024
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 June 2024 Cont.
Country
County
Submission
Reasons*
No.
subs
Samples
Gamma Positive
Gamma Negatives
Retest*
Resample
Reject
n
% of total
n
%
n
%
n
%
PAR-RECUR
2
24
0.13 %
0
0.00 %
21
87.50 %
4
16.67 %
3
12.50 %
0
0.00 %
Warks
PAR-OTHER
1
6
0.03 %
0
0.00 %
4
66.67 %
3
50.00 %
2
33.33 %
0
0.00 %
England - LRA
Cumbria
PAR-NEW-IN
2
627
3.46 %
9
1.44 %
597
95.22 %
28
4.47 %
21
3.35 %
0
0.00 %
Lincs
PAR-NEW-IN
2
10
0.06 %
0
0.00 %
8
80.00 %
2
20.00 %
2
20.00 %
0
0.00 %
SER-FLEXI
1
103
0.57 %
0
0.00 %
53
51.46 %
0
0.00 %
0
0.00 %
50
48.54 %
W Sussex
PAR-NEW-IN
3
704
3.89 %
32
4.55 %
660
93.75 %
16
2.27 %
11
1.56 %
1
0.14 %
England
87
11620
64.20 %
437
3.76 %
10662
91.76 %
630
5.42 %
467
4.02 %
54
0.46 %
Wales - High TB
Carms
PAR-IR-EX
1
3
0.02 %
1
33.33 %
2
66.67 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-IR-SEV
3
11
0.06 %
3
27.27 %
8
72.73 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-PERSIS
3
94
0.52 %
7
7.45 %
83
88.30 %
6
6.38 %
4
4.26 %
0
0.00 %
PAR-RAPID
7
27
0.15 %
9
33.33 %
18
66.67 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-RECUR
5
414
2.29 %
13
3.14 %
378
91.30 %
41
9.90 %
23
5.56 %
0
0.00 %
Ceredigion
PAR-IR-SEV
2
12
0.07 %
3
25.00 %
9
75.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-PERSIS
1
1
0.01 %
0
0.00 %
1
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
Gwent
PAR-IR-SEV
2
24
0.13 %
9
37.50 %
15
62.50 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-PERSIS
2
100
0.55 %
6
6.00 %
91
91.00 %
3
3.00 %
3
3.00 %
0
0.00 %
PAR-RAPID
1
2
0.01 %
2
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-RECUR
6
199
1.10 %
13
6.53 %
177
88.94 %
12
6.03 %
9
4.52 %
0
0.00 %
SER-FLEXI
4
16
0.09 %
2
12.50 %
10
62.50 %
4
25.00 %
4
25.00 %
0
0.00 %
Pembs
PAR-IR-EX
2
24
0.13 %
12
50.00 %
12
50.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-IR-SEV
13
213
1.18 %
41
19.25 %
169
79.34 %
5
2.35 %
3
1.41 %
0
0.00 %
PAR-OTHER
1
275
1.52 %
21
7.64 %
249
90.55 %
8
2.91 %
5
1.82 %
0
0.00 %
PAR-PERSIS
7
1,170
6.46 %
74
6.32 %
1077
92.05 %
25
2.14 %
19
1.62 %
0
0.00 %
PAR-RAPID
6
22
0.12 %
4
18.18 %
18
81.82 %
1
4.55 %
0
0.00 %
0
0.00 %
SER-FLEXI
1
6
0.03 %
0
0.00 %
6
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
Powys
PAR-PERSIS
1
290
1.60 %
16
5.52 %
267
92.07 %
12
4.14 %
7
2.41 %
0
0.00 %
PAR-RAPID
2
2
0.01 %
0
0.00 %
2
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
Wales - Intermediate TB
Ceredigion
PAR-RAPID
1
1
0.01 %
0
0.00 %
0
0.00 %
0
0.00 %
0
0.00 %
1
100.00 %
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 June 2024 Cont.
Country
County
Submission
Reasons*
No.
subs
Samples
Gamma Positive
Gamma Negatives
Retest*
Resample
Reject
n
% of total
n
%
n
%
n
%
Mid Glamorgan
PAR-RECUR
2
88
0.49 %
3
3.41 %
83
94.32 %
3
3.41 %
2
2.27 %
0
0.00 %
NE Wales
PAR-IR-EX
3
10
0.06 %
2
20.00 %
8
80.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-IR-SEV
5
23
0.13 %
3
13.04 %
20
86.96 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-NEW-IN
7
938
5.18 %
16
1.71 %
895
95.42 %
45
4.80 %
25
2.67 %
2
0.21 %
PAR-PERSIS
4
887
4.90 %
42
4.74 %
819
92.33 %
38
4.28 %
23
2.59 %
3
0.34 %
SER-FLEXI
2
441
2.44 %
8
1.81 %
417
94.56 %
23
5.22 %
16
3.63 %
0
0.00 %
Powys
PAR-NEW-IN
2
305
1.68 %
7
2.30 %
290
95.08 %
8
2.62 %
6
1.97 %
2
0.66 %
S Glamorgan
SER-FLEXI
1
75
0.41 %
24
32.00 %
49
65.33 %
2
2.67 %
2
2.67 %
0
0.00 %
Wales - Low TB
Gwynedd
PAR-NEW-IN
10
459
2.54 %
14
3.05 %
423
92.16 %
32
6.97 %
22
4.79 %
0
0.00 %
NE Wales
PAR-NEW-IN
3
349
1.93 %
5
1.43 %
336
96.28 %
8
2.29 %
6
1.72 %
2
0.57 %
Wales
110
6481
35.80 %
360
5.55 %
5932
91.53 %
276
4.26 %
179
2.76 %
10
0.15 %
Grand Total
Sum:
197
18101
797
16594
906
646
64
*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-CHR
3
333
0.29 %
47
14.11 %
264
79.28 %
24
7.21 %
22
6.61 %
0
0.00 %
PAR-PERSIS
5
756
0.66 %
91
12.04 %
621
82.14 %
48
6.35 %
44
5.82 %
0
0.00 %
PAR-RECUR
18
2,358
2.05 %
145
6.15 %
2090
88.63 %
151
6.40 %
121
5.13 %
2
0.08 %
Corn & Scilly
PAR-CUL-P
2
891
0.78 %
35
3.93 %
805
90.35 %
58
6.51 %
51
5.72 %
0
0.00 %
PAR-OTHER
3
947
0.82 %
98
10.35 %
766
80.89 %
97
10.24 %
83
8.76 %
0
0.00 %
PAR-PERSIS
11
1,491
1.30 %
124
8.32 %
1218
81.69 %
169
11.33 %
148
9.93 %
1
0.07 %
PAR-RECUR
39
3,754
3.27 %
262
6.98 %
3072
81.83 %
458
12.20 %
416
11.08 %
4
0.11 %
SER-FLEXI
4
45
0.04 %
12
26.67 %
30
66.67 %
2
4.44 %
2
4.44 %
1
2.22 %
Devon
PAR-CHR
5
458
0.40 %
10
2.18 %
411
89.74 %
41
8.95 %
36
7.86 %
1
0.22 %
PAR-CUL-N
5
240
0.21 %
13
5.42 %
213
88.75 %
17
7.08 %
14
5.83 %
0
0.00 %
PAR-CUL-P
5
225
0.20 %
8
3.56 %
112
49.78 %
111
49.33 %
105
46.67 %
0
0.00 %
PAR-OTHER
6
316
0.28 %
10
3.16 %
263
83.23 %
47
14.87 %
43
13.61 %
0
0.00 %
PAR-PERSIS
11
1,717
1.49 %
90
5.24 %
1529
89.05 %
110
6.41 %
95
5.53 %
3
0.17 %
PAR-RECUR
51
7,899
6.88 %
366
4.63 %
6983
88.40 %
626
7.93 %
519
6.57 %
31
0.39 %
Dorset
PAR-CUL-P
1
6
0.01 %
0
0.00 %
6
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-PERSIS
1
588
0.51 %
29
4.93 %
552
93.88 %
16
2.72 %
7
1.19 %
0
0.00 %
PAR-RECUR
10
2,661
2.32 %
170
6.39 %
2382
89.52 %
129
4.85 %
107
4.02 %
2
0.08 %
SER-FLEXI
5
159
0.14 %
16
10.06 %
139
87.42 %
5
3.14 %
4
2.52 %
0
0.00 %
Gloucs
PAR-RECUR
24
3,580
3.12 %
150
4.19 %
3053
85.28 %
150
4.19 %
118
3.30 %
259
7.23 %
Heref
PAR-CUL-N
1
142
0.12 %
13
9.15 %
119
83.80 %
12
8.45 %
10
7.04 %
0
0.00 %
PAR-CUL-P
1
485
0.42 %
0
0.00 %
0
0.00 %
0
0.00 %
0
0.00 %
485
100.00 %
PAR-OTHER
1
150
0.13 %
10
6.67 %
131
87.33 %
11
7.33 %
9
6.00 %
0
0.00 %
PAR-PERSIS
3
565
0.49 %
25
4.42 %
525
92.92 %
18
3.19 %
15
2.65 %
0
0.00 %
PAR-RECUR
30
4,051
3.53 %
182
4.49 %
3543
87.46 %
369
9.11 %
325
8.02 %
1
0.02 %
Shropshire
PAR-CUL-P
3
370
0.32 %
39
10.54 %
320
86.49 %
11
2.97 %
11
2.97 %
0
0.00 %
PAR-OTHER
4
53
0.05 %
6
11.32 %
39
73.58 %
8
15.09 %
8
15.09 %
0
0.00 %
Table 2b. Summary by County for 2024
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 2024 Cont.
Country
County
Submission
Reasons*
No.
subs
Samples
Gamma Positive
Gamma Negatives
Retest*
Resample
Reject
n
% of total
n
%
n
%
n
%
PAR-PERSIS
3
770
0.67 %
81
10.52 %
667
86.62 %
27
3.51 %
22
2.86 %
0
0.00 %
PAR-RECUR
36
6,373
5.55 %
239
3.75 %
5783
90.74 %
398
6.25 %
325
5.10 %
26
0.41 %
SER-FLEXI
4
430
0.37 %
87
20.23 %
307
71.40 %
44
10.23 %
36
8.37 %
0
0.00 %
Somerset excl N
PAR-CHR
2
78
0.07 %
4
5.13 %
73
93.59 %
2
2.56 %
1
1.28 %
0
0.00 %
PAR-CUL-P
6
967
0.84 %
43
4.45 %
861
89.04 %
61
6.31 %
52
5.38 %
11
1.14 %
PAR-OTHER
2
162
0.14 %
4
2.47 %
141
87.04 %
18
11.11 %
17
10.49 %
0
0.00 %
PAR-PERSIS
2
116
0.10 %
16
13.79 %
83
71.55 %
18
15.52 %
16
13.79 %
1
0.86 %
PAR-RECUR
22
2,308
2.01 %
137
5.94 %
2025
87.74 %
153
6.63 %
140
6.07 %
6
0.26 %
SER-FLEXI
1
56
0.05 %
3
5.36 %
52
92.86 %
2
3.57 %
1
1.79 %
0
0.00 %
Staffs
PAR-CHR
2
169
0.15 %
3
1.78 %
157
92.90 %
13
7.69 %
9
5.33 %
0
0.00 %
PAR-PERSIS
2
233
0.20 %
53
22.75 %
162
69.53 %
27
11.59 %
18
7.73 %
0
0.00 %
PAR-RECUR
21
2,538
2.21 %
107
4.22 %
2273
89.56 %
170
6.70 %
154
6.07 %
4
0.16 %
Wiltshire
PAR-OTHER
1
470
0.41 %
13
2.77 %
442
94.04 %
23
4.89 %
15
3.19 %
0
0.00 %
PAR-RECUR
25
4,322
3.76 %
176
4.07 %
3965
91.74 %
199
4.60 %
161
3.73 %
20
0.46 %
England - Edge
Berks
PAR-NEW-IN
4
386
0.34 %
25
6.48 %
345
89.38 %
17
4.40 %
13
3.37 %
3
0.78 %
Bucks
PAR-NEW-IN
8
490
0.43 %
19
3.88 %
446
91.02 %
31
6.33 %
24
4.90 %
1
0.20 %
PAR-RECUR
4
333
0.29 %
20
6.01 %
293
87.99 %
24
7.21 %
20
6.01 %
0
0.00 %
Cheshire
PAR-NEW-IN
2
1,061
0.92 %
32
3.02 %
792
74.65 %
287
27.05 %
237
22.34 %
0
0.00 %
PAR-OTHER
4
1,041
0.91 %
39
3.75 %
985
94.62 %
24
2.31 %
17
1.63 %
0
0.00 %
PAR-PERSIS
15
1,898
1.65 %
120
6.32 %
1572
82.82 %
232
12.22 %
206
10.85 %
0
0.00 %
Derbyshire
PAR-NEW-IN
3
32
0.03 %
1
3.13 %
24
75.00 %
7
21.88 %
7
21.88 %
0
0.00 %
PAR-RECUR
10
1,470
1.28 %
36
2.45 %
1341
91.22 %
106
7.21 %
91
6.19 %
2
0.14 %
E Sussex
PAR-NEW-IN
10
1,210
1.05 %
56
4.63 %
1083
89.50 %
83
6.86 %
70
5.79 %
1
0.08 %
Hampshire
PAR-NEW-IN
2
259
0.23 %
1
0.39 %
248
95.75 %
15
5.79 %
10
3.86 %
0
0.00 %
Leics & Rut
PAR-NEW-IN
26
3,487
3.04 %
110
3.15 %
3084
88.44 %
347
9.95 %
292
8.37 %
1
0.03 %
Northants
PAR-NEW-IN
19
1,899
1.65 %
57
3.00 %
1707
89.89 %
122
6.42 %
108
5.69 %
27
1.42 %
PAR-RECUR
1
197
0.17 %
1
0.51 %
180
91.37 %
18
9.14 %
16
8.12 %
0
0.00 %
Notts
PAR-NEW-IN
6
436
0.38 %
12
2.75 %
369
84.63 %
58
13.30 %
55
12.61 %
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 2024 Cont.
Country
County
Submission
Reasons*
No.
subs
Samples
Gamma Positive
Gamma Negatives
Retest*
Resample
Reject
n
% of total
n
%
n
%
n
%
Oxon
PAR-HERD-S
1
9
0.01 %
0
0.00 %
7
77.78 %
2
22.22 %
2
22.22 %
0
0.00 %
PAR-NEW-IN
5
555
0.48 %
29
5.23 %
473
85.23 %
56
10.09 %
53
9.55 %
0
0.00 %
PAR-PERSIS
1
201
0.17 %
15
7.46 %
174
86.57 %
22
10.95 %
12
5.97 %
0
0.00 %
PAR-RECUR
10
1,312
1.14 %
42
3.20 %
1199
91.39 %
81
6.17 %
67
5.11 %
4
0.30 %
Warks
PAR-OTHER
4
84
0.07 %
15
17.86 %
60
71.43 %
10
11.90 %
9
10.71 %
0
0.00 %
PAR-RECUR
5
627
0.55 %
26
4.15 %
513
81.82 %
73
11.64 %
88
14.04 %
0
0.00 %
England - LRA
Beds
PAR-NEW-IN
2
33
0.03 %
2
6.06 %
9
27.27 %
5
15.15 %
5
15.15 %
17
51.52 %
Cumbria
PAR-NEW-IN
10
1,563
1.36 %
28
1.79 %
1453
92.96 %
92
5.89 %
81
5.18 %
1
0.06 %
SER-OTHER
1
7
0.01 %
0
0.00 %
7
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
Durham
PAR-NEW-IN
4
109
0.09 %
3
2.75 %
95
87.16 %
8
7.34 %
7
6.42 %
4
3.67 %
Herts
PAR-NEW-IN
2
203
0.18 %
10
4.93 %
180
88.67 %
13
6.40 %
13
6.40 %
0
0.00 %
Humberside
PAR-NEW-IN
2
83
0.07 %
0
0.00 %
75
90.36 %
10
12.05 %
8
9.64 %
0
0.00 %
Kent
SER-OTHER
2
248
0.22 %
1
0.40 %
240
96.77 %
9
3.63 %
6
2.42 %
1
0.40 %
Lancashire
PAR-NEW-IN
2
103
0.09 %
1
0.97 %
98
95.15 %
5
4.85 %
3
2.91 %
1
0.97 %
Lincs
PAR-NEW-IN
7
437
0.38 %
10
2.29 %
410
93.82 %
22
5.03 %
17
3.89 %
0
0.00 %
SER-FLEXI
1
103
0.09 %
0
0.00 %
53
51.46 %
0
0.00 %
0
0.00 %
50
48.54 %
Norfolk
PAR-NEW-IN
4
112
0.10 %
7
6.25 %
75
66.96 %
27
24.11 %
27
24.11 %
3
2.68 %
N Yorks
PAR-NEW-IN
4
507
0.44 %
7
1.38 %
465
91.72 %
38
7.50 %
34
6.71 %
1
0.20 %
W Sussex
PAR-NEW-IN
3
704
0.61 %
32
4.55 %
660
93.75 %
16
2.27 %
11
1.56 %
1
0.14 %
SER-OTHER
2
13
0.01 %
0
0.00 %
13
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
England
567
74444
64.81 %
3674
4.94 %
64905
87.19 %
5703
7.66 %
4889
6.57 %
976
1.31 %
Wales - High TB
Carms
PAR-IR-EX
9
25
0.02 %
8
32.00 %
13
52.00 %
4
16.00 %
4
16.00 %
0
0.00 %
PAR-IR-SEV
37
256
0.22 %
90
35.16 %
156
60.94 %
11
4.30 %
8
3.13 %
2
0.78 %
PAR-NEW-IN
1
21
0.02 %
1
4.76 %
19
90.48 %
2
9.52 %
1
4.76 %
0
0.00 %
PAR-OTHER
5
232
0.20 %
20
8.62 %
198
85.34 %
20
8.62 %
14
6.03 %
0
0.00 %
PAR-PERSIS
21
3,456
3.01 %
190
5.50 %
3151
91.17 %
130
3.76 %
108
3.13 %
7
0.20 %
PAR-RAPID
31
143
0.12 %
56
39.16 %
84
58.74 %
6
4.20 %
3
2.10 %
0
0.00 %
PAR-RECUR
15
3,415
2.97 %
88
2.58 %
3233
94.67 %
134
3.92 %
92
2.69 %
2
0.06 %
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 2024 Cont.
Country
County
Submission
Reasons*
No.
subs
Samples
Gamma Positive
Gamma Negatives
Retest*
Resample
Reject
n
% of total
n
%
n
%
n
%
SER-FLEXI
3
59
0.05 %
7
11.86 %
50
84.75 %
2
3.39 %
1
1.69 %
1
1.69 %
Ceredigion
PAR-HERD-S
1
35
0.03 %
6
17.14 %
27
77.14 %
2
5.71 %
2
5.71 %
0
0.00 %
PAR-IR-EX
5
27
0.02 %
16
59.26 %
11
40.74 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-IR-SEV
8
48
0.04 %
18
37.50 %
30
62.50 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-PERSIS
5
486
0.42 %
30
6.17 %
419
86.21 %
42
8.64 %
36
7.41 %
1
0.21 %
PAR-RAPID
4
7
0.01 %
2
28.57 %
5
71.43 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-RECUR
1
77
0.07 %
9
11.69 %
68
88.31 %
1
1.30 %
0
0.00 %
0
0.00 %
Gwent
PAR-IR-EX
3
19
0.02 %
8
42.11 %
9
47.37 %
2
10.53 %
2
10.53 %
0
0.00 %
PAR-IR-SEV
6
53
0.05 %
20
37.74 %
33
62.26 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-OTHER
4
30
0.03 %
2
6.67 %
25
83.33 %
4
13.33 %
3
10.00 %
0
0.00 %
PAR-PERSIS
5
176
0.15 %
14
7.95 %
158
89.77 %
4
2.27 %
4
2.27 %
0
0.00 %
PAR-RAPID
11
46
0.04 %
24
52.17 %
21
45.65 %
2
4.35 %
1
2.17 %
0
0.00 %
PAR-RECUR
15
1,067
0.93 %
39
3.66 %
988
92.60 %
46
4.31 %
40
3.75 %
0
0.00 %
SER-FLEXI
6
400
0.35 %
5
1.25 %
375
93.75 %
23
5.75 %
18
4.50 %
2
0.50 %
Pembs
PAR-IR-EX
18
70
0.06 %
30
42.86 %
39
55.71 %
1
1.43 %
1
1.43 %
0
0.00 %
PAR-IR-SEV
113
1,131
0.98 %
364
32.18 %
706
62.42 %
71
6.28 %
61
5.39 %
0
0.00 %
PAR-OTHER
7
323
0.28 %
26
8.05 %
285
88.24 %
15
4.64 %
12
3.72 %
0
0.00 %
PAR-PERSIS
54
7,357
6.41 %
448
6.09 %
6521
88.64 %
336
4.57 %
251
3.41 %
137
1.86 %
PAR-RAPID
46
152
0.13 %
48
31.58 %
96
63.16 %
9
5.92 %
8
5.26 %
0
0.00 %
PAR-RECUR
29
2,936
2.56 %
130
4.43 %
2637
89.82 %
203
6.91 %
160
5.45 %
9
0.31 %
SER-FLEXI
16
1,512
1.32 %
89
5.89 %
1289
85.25 %
153
10.12 %
132
8.73 %
2
0.13 %
Powys
PAR-IR-EX
3
20
0.02 %
4
20.00 %
15
75.00 %
2
10.00 %
1
5.00 %
0
0.00 %
PAR-IR-SEV
18
137
0.12 %
61
44.53 %
72
52.55 %
4
2.92 %
4
2.92 %
0
0.00 %
PAR-OTHER
2
73
0.06 %
2
2.74 %
66
90.41 %
7
9.59 %
4
5.48 %
1
1.37 %
PAR-PERSIS
5
792
0.69 %
44
5.56 %
693
87.50 %
62
7.83 %
55
6.94 %
0
0.00 %
PAR-RAPID
8
13
0.01 %
5
38.46 %
8
61.54 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-RECUR
18
1,155
1.01 %
64
5.54 %
1040
90.04 %
61
5.28 %
49
4.24 %
2
0.17 %
SER-FLEXI
2
177
0.15 %
26
14.69 %
98
55.37 %
60
33.90 %
53
29.94 %
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 2024 Cont.
Country
County
Submission
Reasons*
No.
subs
Samples
Gamma Positive
Gamma Negatives
Retest*
Resample
Reject
n
% of total
n
%
n
%
n
%
S Wales
PAR-IR-SEV
1
17
0.01 %
4
23.53 %
13
76.47 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-RAPID
1
1
0.00 %
0
0.00 %
1
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-RECUR
2
28
0.02 %
4
14.29 %
22
78.57 %
1
3.57 %
1
3.57 %
1
3.57 %
Wales - Intermediate TB
Carms
PAR-PERSIS
2
2
0.00 %
1
50.00 %
1
50.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-RAPID
2
3
0.00 %
1
33.33 %
1
33.33 %
1
33.33 %
1
33.33 %
0
0.00 %
Ceredigion
PAR-IR-EX
1
21
0.02 %
17
80.95 %
4
19.05 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-IR-SEV
3
3
0.00 %
1
33.33 %
2
66.67 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-RAPID
2
5
0.00 %
2
40.00 %
2
40.00 %
0
0.00 %
0
0.00 %
1
20.00 %
Mid Glamorgan
PAR-RECUR
2
88
0.08 %
3
3.41 %
83
94.32 %
3
3.41 %
2
2.27 %
0
0.00 %
NE Wales
PAR-IR-EX
9
21
0.02 %
4
19.05 %
17
80.95 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-IR-SEV
26
125
0.11 %
32
25.60 %
83
66.40 %
10
8.00 %
10
8.00 %
0
0.00 %
PAR-NEW-IN
36
3,201
2.79 %
104
3.25 %
2895
90.44 %
236
7.37 %
190
5.94 %
12
0.37 %
PAR-OTHER
1
1
0.00 %
0
0.00 %
1
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-PERSIS
23
2,218
1.93 %
107
4.82 %
2028
91.43 %
94
4.24 %
74
3.34 %
9
0.41 %
PAR-RAPID
7
10
0.01 %
2
20.00 %
8
80.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-RECUR
6
588
0.51 %
18
3.06 %
527
89.63 %
45
7.65 %
43
7.31 %
0
0.00 %
SER-FLEXI
4
569
0.50 %
29
5.10 %
517
90.86 %
31
5.45 %
23
4.04 %
0
0.00 %
Powys
PAR-IR-SEV
2
7
0.01 %
1
14.29 %
6
85.71 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-NEW-IN
6
722
0.63 %
17
2.35 %
678
93.91 %
29
4.02 %
25
3.46 %
2
0.28 %
PAR-RAPID
2
18
0.02 %
4
22.22 %
11
61.11 %
3
16.67 %
3
16.67 %
0
0.00 %
PAR-RECUR
5
411
0.36 %
26
6.33 %
365
88.81 %
25
6.08 %
20
4.87 %
0
0.00 %
S Glamorgan
PAR-RAPID
3
14
0.01 %
4
28.57 %
10
71.43 %
1
7.14 %
0
0.00 %
0
0.00 %
SER-FLEXI
1
75
0.07 %
24
32.00 %
49
65.33 %
2
2.67 %
2
2.67 %
0
0.00 %
Wales - Low TB
Conwy
PAR-NEW-IN
1
28
0.02 %
0
0.00 %
28
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
Gwynedd
PAR-IR-EX
1
3
0.00 %
1
33.33 %
2
66.67 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-IR-SEV
3
12
0.01 %
6
50.00 %
5
41.67 %
1
8.33 %
1
8.33 %
0
0.00 %
PAR-NEW-IN
44
2,618
2.28 %
77
2.94 %
2322
88.69 %
253
9.66 %
215
8.21 %
4
0.15 %
PAR-RAPID
2
2
0.00 %
0
0.00 %
1
50.00 %
1
50.00 %
1
50.00 %
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 2b. Summary by County for 2024 Cont.
Country
County
Submission
Reasons*
No.
subs
Samples
Gamma Positive
Gamma Negatives
Retest*
Resample
Reject
n
% of total
n
%
n
%
n
%
PAR-RECUR
1
18
0.02 %
0
0.00 %
18
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
SER-FLEXI
3
10
0.01 %
3
30.00 %
6
60.00 %
1
10.00 %
1
10.00 %
0
0.00 %
NE Wales
PAR-IR-EX
1
1
0.00 %
0
0.00 %
1
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-IR-SEV
4
23
0.02 %
9
39.13 %
13
56.52 %
1
4.35 %
1
4.35 %
0
0.00 %
PAR-NEW-IN
21
2,111
1.84 %
68
3.22 %
1806
85.55 %
261
12.36 %
232
10.99 %
5
0.24 %
PAR-PERSIS
2
59
0.05 %
5
8.47 %
53
89.83 %
1
1.69 %
1
1.69 %
0
0.00 %
PAR-RAPID
2
9
0.01 %
3
33.33 %
4
44.44 %
2
22.22 %
2
22.22 %
0
0.00 %
PAR-RECUR
1
171
0.15 %
3
1.75 %
148
86.55 %
19
11.11 %
19
11.11 %
1
0.58 %
SER-FLEXI
3
162
0.14 %
30
18.52 %
104
64.20 %
31
19.14 %
28
17.28 %
0
0.00 %
Wales
771
39301
34.22 %
2604
6.63 %
34473
87.72 %
2471
6.29 %
2023
5.15 %
201
0.51 %
Scotland - Scotland
Ayrshire
PAR-NEW-IN
2
248
0.22 %
5
2.02 %
236
95.16 %
8
3.23 %
6
2.42 %
1
0.40 %
West lothian
PAR-NEW-IN
1
27
0.02 %
0
0.00 %
16
59.26 %
11
40.74 %
11
40.74 %
0
0.00 %
Wigtown
PAR-NEW-IN
6
842
0.73 %
20
2.38 %
738
87.65 %
96
11.40 %
82
9.74 %
2
0.24 %
Scotland
9
1117
0.97 %
25
2.24 %
990
88.63 %
115
10.30 %
99
8.86 %
3
0.27 %
Grand Total
Sum:
xx-xxxx-xxxx
6303
100368
8289
7011
1180
*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 June 2024
Country
Protocol
No
submissions Samples
Positive
Negatives
Retest*
Resample
Reject
n
% of total n
%
n
%
n
%
n
%
n
%
England
Parallel
86
11517
99.1%
437
3.8%
10609
92.1%
630
5.5%
467
4.1%
4
0.0%
Serial/Extended
1
103
0.9%
0
0.0 %
53
51.5%
0
0.0 %
0
0.0 %
50
48.5%
Total
87
11620
100.0%
437
3.8%
10662
91.8%
630
5.4%
467
4.0%
54
0.5%
Scotland
Parallel
0
0
0.0 %
0
0.0 %
0
0.0 %
0
0.0 %
0
0.0 %
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
0
0
0.0 %
0
0.0 %
0
0.0 %
0
0.0 %
0
0.0 %
0
0.0 %
Wales
Parallel
102
5943
91.7%
326
5.5%
5450
91.7%
247
4.2%
157
2.6%
10
0.2%
Serial/Extended
8
538
8.3%
34
6.3%
482
89.6%
29
5.4%
22
4.1%
0
0.0 %
Total
110
6481
100.0%
360
5.6%
5932
91.5%
276
4.3%
179
2.8%
10
0.2%
GB
Parallel
188
17460
96.5%
763
4.4%
16059
92.0%
877
5.0%
624
3.6%
14
0.1%
Serial/Extended
9
641
3.5%
34
5.3%
535
83.5%
29
4.5%
22
3.4%
50
7.8%
Total
197
18101
100.0%
797
4.4%
16594
91.7%
906
5.0%
646
3.6%
64
0.4%
87.00
110.00
* 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 2024)
Country
Protocol
No
submissions Samples
Positive
Negatives
Retest*
Resample
Reject
n
% of total n
%
n
%
n
%
n
%
n
%
England
Parallel
547
73383
98.6%
3555
4.8%
64064
87.3%
5641
7.7%
4840
6.6%
924
1.3%
Serial/Extended
20
1061
1.4%
119
11.2%
841
79.3%
62
5.8%
49
4.6%
52
4.9%
Total
567
74444
100.0%
3674
4.9%
64905
87.2%
5703
7.7%
4889
6.6%
976
1.3%
Scotland
Parallel
9
1117
100.0%
25
2.2%
990
88.6%
115
10.3%
99
8.9%
3
0.3%
Serial/Extended
0
0
0.0 %
0
0.0 %
0
0.0 %
0
0.0 %
0
0.0 %
0
0.0 %
Total
9
1117
100.0%
25
2.2%
990
88.6%
115
10.3%
99
8.9%
3
0.3%
Wales
Parallel
733
36337
92.5%
2391
6.6%
31985
88.0%
2168
6.0%
1765
4.9%
196
0.5%
Serial/Extended
38
2964
7.5%
213
7.2%
2488
83.9%
303
10.2%
258
8.7%
5
0.2%
Total
771
39301
100.0%
2604
6.6%
34473
87.7%
2471
6.3%
2023
5.1%
201
0.5%
GB
Parallel
1289 110837
96.5%
5971
5.4%
97039
87.6%
7924
7.1%
6704
6.0%
1123
1.0%
Serial/Extended
58
4025
3.5%
332
8.2%
3329
82.7%
365
9.1%
307
7.6%
57
1.4%
Total
xx-xxxx-xxxx
100.0%
6303
5.5% 100368
87.4%
8289
7.2%
7011
6.1%
1180
1.0%
567.00
771.00
9.00
* 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
9
641
3.5%
34
5.3%
535
83.5%
29
4.5 %
22
3.4 %
50
7.8 %
Parallel – chronic breakdown
2
169
0.9%
3
1.8%
157
92.9%
13
7.7 %
9
5.3 %
0
Parallel - IRs in Exit Strategy for persistent her
6
37
0.2%
15
40.5%
22
59.5%
0
0
0
Parallel New Infection
43
5013
27.7%
116
2.3%
4703
93.8%
270
5.4 %
187
3.7 %
7
0.1 %
Parallel - new infection cull area
1
1
0.0%
0
0.0 %
1
100.0%
0
0
0
Parallel - Other
5
651
3.6%
48
7.4%
587
90.2%
22
3.4 %
16
2.5 %
0
Parallel Persistent Infection
22
3204
17.7%
171
5.3%
2964
92.5%
100
3.1 %
66
2.1 %
3
0.1 %
Parallel - persistent infection cull area
4
262
1.4%
19
7.3%
230
87.8%
16
6.1 %
13
5.0 %
0
Parallel - Rapid Testing Two-times IRs
17
54
0.3%
15
27.8%
38
70.4%
1
1.9 %
0
1
1.9 %
Parallel - Recurrent breakdowns
63
7786
43.0%
317
4.1%
7136
91.7%
450
5.8 %
330
4.2 %
3
0.0 %
Parallel - severe IRs - in persistent herds
25
283
1.6%
59
20.8%
221
78.1%
5
1.8 %
3
1.1 %
0
Total
197
18101
100.0%
797
4.4%
16594
91.7%
906
5.0 %
646
3.6 %
64
0.4 %
Table 4a. Summaryof IFN Gamma results by submission reason (June 2024)
England - HRA
Parallel – chronic breakdown
2
169
0.9%
3
1.8%
157
92.9%
13
7.7 %
9
5.3 %
0
Parallel - new infection cull area
1
1
0.0%
0
0.0 %
1
100.0%
0
0
0
Parallel - Other
1
6
0.0%
3
50.0%
3
50.0%
0
0
0
Parallel Persistent Infection
4
662
3.7%
26
3.9%
626
94.6%
16
2.4 %
10
1.5 %
0
Parallel - persistent infection cull area
4
262
1.4%
19
7.3%
230
87.8%
16
6.1 %
13
5.0 %
0
Parallel - Recurrent breakdowns
46
6933
38.3%
283
4.1%
6362
91.8%
380
5.5 %
285
4.1 %
3
0.0 %
England - HRA
58
8033
44.4%
334
4.2%
7379
91.9%
425
5.3 %
317
3.9 %
3
0.0 %
England - Edge
Parallel New Infection
14
1621
9.0%
33
2.0%
1494
92.2%
131
8.1 %
94
5.8 %
0
Parallel - Other
3
370
2.0%
24
6.5%
335
90.5%
14
3.8 %
11
3.0 %
0
Parallel - Recurrent breakdowns
4
152
0.8%
5
3.3%
136
89.5%
14
9.2 %
11
7.2 %
0
England - Edge
21
2143
11.8%
62
2.9%
1965
91.7%
159
7.4 %
116
5.4 %
0
England - LRA
Extended Flexible IFN-GAMMA test
1
103
0.6%
0
0.0 %
53
51.5%
0
0
50
48.5 %
Parallel New Infection
7
1341
7.4%
41
3.1%
1265
94.3%
46
3.4 %
34
2.5 %
1
0.1 %
England - LRA
8
1444
8.0%
41
2.8%
1318
91.3%
46
3.2 %
34
2.4 %
51
3.5 %
Wales - High TB
Extended Flexible IFN-GAMMA test
5
22
0.1%
2
9.1%
16
72.7%
4
18.2 %
4
18.2 %
0
Parallel - IRs in Exit Strategy for persistent her
3
27
0.1%
13
48.1%
14
51.9%
0
0
0
Parallel - Other
1
275
1.5%
21
7.6%
249
90.5%
8
2.9 %
5
1.8 %
0
Parallel Persistent Infection
14
1655
9.1%
103
6.2%
1519
91.8%
46
2.8 %
33
2.0 %
0
Parallel - Rapid Testing Two-times IRs
16
53
0.3%
15
28.3%
38
71.7%
1
1.9 %
0
0
Parallel - Recurrent breakdowns
11
613
3.4%
26
4.2%
555
90.5%
53
8.6 %
32
5.2 %
0
Parallel - severe IRs - in persistent herds
20
260
1.4%
56
21.5%
201
77.3%
5
1.9 %
3
1.2 %
0
Wales - High TB
70
2905
16.0%
236
8.1%
2592
89.2%
117
4.0 %
77
2.7 %
0
Wales - Intermediate TB
Extended Flexible IFN-GAMMA test
3
516
2.9%
32
6.2%
466
90.3%
25
4.8 %
18
3.5 %
0
Parallel - IRs in Exit Strategy for persistent her
3
10
0.1%
2
20.0%
8
80.0%
0
0
0
Parallel New Infection
9
1243
6.9%
23
1.9%
1185
95.3%
53
4.3 %
31
2.5 %
4
0.3 %
Parallel Persistent Infection
4
887
4.9%
42
4.7%
819
92.3%
38
4.3 %
23
2.6 %
3
0.3 %
Parallel - Rapid Testing Two-times IRs
1
1
0.0%
0
0.0 %
0
0.0 %
0
0
1
100.0 %
Parallel - Recurrent breakdowns
2
88
0.5%
3
3.4%
83
94.3%
3
3.4 %
2
2.3 %
0
Parallel - severe IRs - in persistent herds
5
23
0.1%
3
13.0%
20
87.0%
0
0
0
Wales - Intermediate TB
27
2768
15.3%
105
3.8%
2581
93.2%
119
4.3 %
74
2.7 %
8
0.3 %
Wales - Low TB
Parallel New Infection
13
808
4.5%
19
2.4%
759
93.9%
40
5.0 %
28
3.5 %
2
0.2 %
Wales - Low TB
13
808
4.5%
19
2.4%
759
93.9%
40
5.0 %
28
3.5 %
2
0.2 %

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
53
3757
3.3%
331
8.8%
3069
81.7%
356
9.5 %
301
8.0 %
56
1.5 %
Parallel – chronic breakdown
12
1038
0.9%
64
6.2%
905
87.2%
80
7.7 %
68
6.6 %
1
0.1 %
Parallel - Herd or Group Slaughter
2
44
0.0%
6
13.6%
34
77.3%
4
9.1 %
4
9.1 %
0
Parallel - IRs in Exit Strategy for persistent herds
50
207
0.2%
88
42.5%
111
53.6%
9
4.3 %
8
3.9 %
0
Parallel New Infection
243
23487
20.4%
734
3.1%
20829
88.7%
2155
9.2 %
1837
7.8 %
87
0.4 %
Parallel - new infection cull area
6
382
0.3%
26
6.8%
332
86.9%
29
7.6 %
24
6.3 %
0
Parallel - Other
44
3882
3.4%
245
6.3%
3402
87.6%
284
7.3 %
234
6.0 %
1
0.0 %
Parallel Persistent Infection
171
22881
19.9%
1483
6.5%
20127
88.0%
1356
5.9 %
1112
4.9 %
159
0.7 %
Parallel - persistent infection cull area
18
2944
2.6%
125
4.2%
2104
71.5%
241
8.2 %
219
7.4 %
496
16.8 %
Parallel - Rapid Testing Two-times IRs
121
423
0.4%
151
35.7%
252
59.6%
25
5.9 %
19
4.5 %
1
0.2 %
Parallel - Recurrent breakdowns
401
53737
46.8%
2443
4.5%
47824
89.0%
3643
6.8 %
3094
5.8 %
376
0.7 %
Parallel - severe IRs - in persistent herds
221
1812
1.6%
606
33.4%
1119
61.8%
98
5.4 %
85
4.7 %
2
0.1 %
Serial - Other
5
268
0.2%
1
0.4%
260
97.0%
9
3.4 %
6
2.2 %
1
0.4 %
Total
xx-xxxx-xxxx
100.0%
6303
5.5%
100368
87.4%
8289
7.2 %
7011
6.1 %
1180
1.0 %
Table 4b. Summary of IFN Gamma results by submission reason (Total 2024)
England - HRA
Extended Flexible IFN-GAMMA test
14
690
0.6%
118
17.1%
528
76.5%
53
7.7 %
43
6.2 %
1
0.1 %
Parallel – chronic breakdown
12
1038
0.9%
64
6.2%
905
87.2%
80
7.7 %
68
6.6 %
1
0.1 %
Parallel - new infection cull area
6
382
0.3%
26
6.8%
332
86.9%
29
7.6 %
24
6.3 %
0
Parallel - Other
17
2098
1.8%
141
6.7%
1782
84.9%
204
9.7 %
175
8.3 %
0
Parallel Persistent Infection
38
6236
5.4%
509
8.2%
5357
85.9%
433
6.9 %
365
5.9 %
5
0.1 %
Parallel - persistent infection cull area
18
2944
2.6%
125
4.2%
2104
71.5%
241
8.2 %
219
7.4 %
496
16.8 %
Parallel - Recurrent breakdowns
276
39844
34.7%
1934
4.9%
35169
88.3%
2803
7.0 %
2386
6.0 %
355
0.9 %
England - Edge
Parallel - Herd or Group Slaughter
1
9
0.0%
0
0.0 %
7
77.8%
2
22.2 %
2
22.2 %
0
Parallel New Infection
85
9815
8.5%
342
3.5%
8571
87.3%
1023
10.4 %
869
8.9 %
33
0.3 %
Parallel - Other
8
1125
1.0%
54
4.8%
1045
92.9%
34
3.0 %
26
2.3 %
0
Parallel Persistent Infection
16
2099
1.8%
135
6.4%
1746
83.2%
254
12.1 %
218
10.4 %
0
Parallel - Recurrent breakdowns
30
3939
3.4%
125
3.2%
3526
89.5%
302
7.7 %
282
7.2 %
6
0.2 %
England - LRA
Extended Flexible IFN-GAMMA test
1
103
0.1%
0
0.0 %
53
51.5%
0
0
50
48.5 %

Table 4b. Summary of IFN Gamma results by submission reason (Total 2024) Cont.
Parallel New Infection
40
3854
3.4%
100
2.6%
3520
91.3%
236
6.1 %
206
5.3 %
28
0.7 %
Serial - Other
5
268
0.2%
1
0.4%
260
97.0%
9
3.4 %
6
2.2 %
1
0.4 %
England
567
74444
64.8%
3674
4.9%
64905
87.2%
5703
7.7 %
4889
6.6 %
976
1.3 %
Wales - High TB
Extended Flexible IFN-GAMMA test
27
2148
1.9%
127
5.9%
1812
84.4%
238
11.1 %
204
9.5 %
5
0.2 %
Parallel - Herd or Group Slaughter
1
35
0.0%
6
17.1%
27
77.1%
2
5.7 %
2
5.7 %
0
Parallel - IRs in Exit Strategy for persistent herd
38
161
0.1%
66
41.0%
87
54.0%
9
5.6 %
8
5.0 %
0
Parallel New Infection
1
21
0.0%
1
4.8%
19
90.5%
2
9.5 %
1
4.8 %
0
Parallel - Other
18
658
0.6%
50
7.6%
574
87.2%
46
7.0 %
33
5.0 %
1
0.2 %
Parallel Persistent Infection
90
12267
10.7%
726
5.9%
10942
89.2%
574
4.7 %
454
3.7 %
145
1.2 %
Parallel - Rapid Testing Two-times IRs
101
362
0.3%
135
37.3%
215
59.4%
17
4.7 %
12
3.3 %
0
Parallel - Recurrent breakdowns
80
8678
7.6%
334
3.8%
7988
92.0%
446
5.1 %
342
3.9 %
14
0.2 %
Parallel - severe IRs - in persistent herds
183
xx-xxxx-xxxx
1.4%
557
33.9%
1010
61.5%
86
5.2 %
73
4.4 %
2
0.1 %
Wales - Intermediate TB
Extended Flexible IFN-GAMMA test
5
644
0.6%
53
8.2%
566
87.9%
33
5.1 %
25
3.9 %
0
Parallel - IRs in Exit Strategy for persistent herd
10
42
0.0%
21
50.0%
21
50.0%
0
0
0
Parallel New Infection
42
3923
3.4%
121
3.1%
3573
91.1%
265
6.8 %
215
5.5 %
14
0.4 %
Parallel - Other
1
1
0.0%
0
0.0 %
1
100.0%
0
0
0
Parallel Persistent Infection
25
2220
1.9%
108
4.9%
2029
91.4%
94
4.2 %
74
3.3 %
9
0.4 %
Parallel - Rapid Testing Two-times IRs
16
50
0.0%
13
26.0%
32
64.0%
5
10.0 %
4
8.0 %
1
2.0 %
Parallel - Recurrent breakdowns
13
1087
0.9%
47
4.3%
975
89.7%
73
6.7 %
65
6.0 %
0
Parallel - severe IRs - in persistent herds
31
135
0.1%
34
25.2%
91
67.4%
10
7.4 %
10
7.4 %
0
Wales - Low TB
Extended Flexible IFN-GAMMA test
6
172
0.1%
33
19.2%
110
64.0%
32
18.6 %
29
16.9 %
0
Parallel - IRs in Exit Strategy for persistent herd
2
4
0.0%
1
25.0%
3
75.0%
0
0
0
Parallel New Infection
66
4757
4.1%
145
3.0%
4156
87.4%
514
10.8 %
447
9.4 %
9
0.2 %
Parallel Persistent Infection
2
59
0.1%
5
8.5%
53
89.8%
1
1.7 %
1
1.7 %
0
Parallel - Rapid Testing Two-times IRs
4
11
0.0%
3
27.3%
5
45.5%
3
27.3 %
3
27.3 %
0
Parallel - Recurrent breakdowns
2
189
0.2%
3
1.6%
166
87.8%
19
10.1 %
19
10.1 %
1
0.5 %
Parallel - severe IRs - in persistent herds
7
35
0.0%
15
42.9%
18
51.4%
2
5.7 %
2
5.7 %
0
Wales
771
39301
34.2%
2604
6.6%
34473
87.7%
2471
6.3 %
2023
5.1 %
201
0.5 %
Scotland - Scotland
Parallel New Infection
9
1117
1.0%
25
2.2%
990
88.6%
115
10.3 %
99
8.9 %
3
0.3 %
Scotland
9
1117
1.0%
25
2.2%
990
88.6%
115
10.3 %
99
8.9 %
3
0.3 %

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 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
2
0
12
0
503
0
56
1
0
October
253
18656
139
825
1
7
0
0
0
0
50
2
0
9
0
701
0
53
0
2
November
250
22290
157
1277
6
24
0
0
0
0
142
8
0
18
0
982
0
97
0
0
December
183
14037
114
892
11
0
0
0
0
69
3
0
18
0
747
0
44
0
0
2024 January
234
21995
171
1438
1
26
0
0
0
0
54
3
1
6
0
1254
1
91
0
1
February
257
20510
159
1189
13
0
0
0
0
31
1
0
12
0
1021
1
109
1
0
March
215
19876
142
1054
15
0
0
0
0
70
2
0
26
0
879
0
60
0
0
April
237
18969
146
1092
4
0
0
0
0
44
0
0
10
5
958
0
71
0
0
May
207
15411
129
733
41
0
0
0
0
10
0
1
6
5
617
0
53
0
0
June
197
18101
133
797
100
369
0
0
0
0
11
0
6
6
0
142
0
0
0
0
Totals (last
12 months)
2715
227066
1650
11399
108
542
0
0
0
0
709
31
8
152
10
8917
2
746
3
3
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
1103
150895
745
6940
363
0
0
0
0
684
18
5
89
5
5602
1
87
1
0
Scotland
45
5860
27
113
6
0
0
0
0
1
0
0
2
1
59
0
41
1
0
Wales
1567
70311
878
4346
173
0
0
0
0
24
13
3
61
4
3256
1
618
1
3
Totals
2715
227066
1650
11399
542
0
0
0
0
709
31
8
152
10
8917
2
746
3
3
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
63
171
98
159
73
142
91
146
78
129
64
133
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
January
February
March
April
May
June
2022
2023
2024
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
20308
1434
18508
1189
18373
1054
17402
1092
14468
733
17182
797
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
January
February
March
April
May
June
2022
2023
2024
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
10
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
February
March
April
May
June
2022
2023
2024
%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
10
20
30
40
50
60
70
80
90
W Sussex
Wiltshire
Warks
Staffs
Somerset excl N
Shropshire
S Glamorgan
Powys
Pembs
Oxon
Northants
NE Wales
Mid Glamorgan
Lincs
Leics & Rut
Heref
Hampshire
Gwynedd
Gwent
Gloucs
Dorset
Devon
Derbyshire
Cumbria
Corn & Scilly
Cheshire
Ceredigion
Carms
Bucks
Avon
%Retested
%Resampled
Figure 6. Proportion of samples retested, or requiring a resample, during June 2024 (% submission per County)
County
%Resampled %Retested
Avon
3.32 %
4.32 %
Bucks
2.46 %
4.58 %
Carms
4.92 %
8.56 %
Ceredigion
Cheshire
2.47 %
3.02 %
Corn & Scilly
3.28 %
4.18 %
Cumbria
3.35 %
4.47 %
Derbyshire
30.00 %
30.00 %
Devon
4.11 %
5.75 %
Dorset
Gloucs
2.09 %
4.55 %
Gwent
4.69 %
5.57 %
Gwynedd
4.79 %
6.97 %
Hampshire
3.64 %
5.67 %
Heref
9.20 %
10.34 %
Leics & Rut
8.39 %
11.23 %
Lincs
1.77 %
1.77 %
Mid Glamorgan
2.27 %
3.41 %
NE Wales
2.64 %
4.31 %
Northants
3.33 %
5.33 %
Oxon
6.01 %
7.10 %
Pembs
1.58 %
2.28 %
Powys
2.18 %
3.35 %
S Glamorgan
2.67 %
2.67 %
Shropshire
2.80 %
3.90 %
Somerset excl
3.50 %
4.42 %
Staffs
4.40 %
5.08 %
Warks
33.33 %
50.00 %
Wiltshire
6.79 %
8.85 %
W Sussex
1.56 %
2.27 %

Country
No.
animals
No of IFNg+
animals
% Positive
animals
No. samples
No of IFNg+
samples
% Positive
samples
England
11556
437
3.8%
11620
437
3.8%
Wales
6423
360
5.6%
6481
360
5.6%
GB
17979
797
4.4%
18101
797
4.4%
Table 6a (i): Number of animals and submissions tested in June 2024
Country
No.
animals
No of IFNg+
animals
% Positive
animals
No. samples
No of IFNg+
samples
% Positive
samples
England
70509
3670
5.2%
74444
3674
4.9%
Wales
37279
2602
7.0%
39301
2604
6.6%
Scotland
1051
25
2.4%
1117
25
2.2%
GB
108836
6297
5.8%
114862
6303
5.5%
Table 6b (i): Number of animals and submissions tested in 2024 Up to end of June
Country
No.
animals
No of IFNg+
animals
% Positive
animals
No. samples
No of IFNg+
samples
% Positive
samples
England
8953
331
3.7%
9076
331
3.6%
Wales
6078
163
2.7%
6123
163
2.7%
Scotland
1282
30
2.3%
1282
30
2.3%
GB
16313
524
3.2%
xx-xxxx-xxxx
524
3.2%
Table 6a (ii): Number of animals and submissions tested in June 2023
Table 6b (ii): Number of animals and submissions tested in 2023 Up to end of June
Country
No.
animals
No of IFNg+
animals
% Positive
animals
No. samples
No of IFNg+
samples
% Positive
samples
England
64289
2775
4.3%
67807
2775
4.1%
Wales
30930
1772
5.7%
32791
1772
5.4%
Scotland
4390
382
8.7%
7039
382
5.4%
GB
99591
4929
4.9%
107637
4929
4.6%

* Test type
Num
Submissions
Num Samples Num Positives
Private
% Positive
Cornwall and Isles of Scilly
PRV-SE
1
4
0
0
Total
1
4
0
*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 June 2024
Table 7b Number of private samples 2024
* Test type
Num
Submissions
Num
Samples
Num
Positives
Private
% Positive
Cornwall and Isles of Scilly
PRV-SE
2
19
0
0
PRV-SP
2
4
0
0
Devon
PRV-SE
4
137
9
6.57 %
East Sussex
PRV-SP
1
1
0
0
Gloucestershire
PRV-SE
1
78
7
8.97 %
North Yorkshire
PRV-SP
1
1
0
0
Oxfordshire
PRV-SE
1
5
0
0
Wiltshire
PRV-SP
1
1
0
0
Worcestershire
PRV-SE
1
1
0
0
Total
14
247
16
6.48 %

Country
County
Test Reason
Num
Submissions
Num Samples
Tested
Num Positive
Samples
% Positive
England
Devon
BOV-OTHER
3
422
27
6.4%
England
3
422
27
6.4%
Wales
Carmarthenshire
BOV-IR-C
2
31
1
3.2%
Ceredigion
BOV-IR-C
4
14
5
35.7%
North East Wales
BOV-IR-C
3
22
3
13.6%
BOV-IR-EX
1
4
0
0
BOV-OTHER
1
36
1
2.8%
Pembrokeshire
BOV-IR-C
17
246
49
19.9%
BOV-IR-EX
7
46
22
47.8%
BOV-OTHER
1
35
1
2.9%
Powys
BOV-IR-C
1
2
0
0
BOV-IR-EX
1
4
0
0
South Wales
BOV-IR-C
3
25
8
32.0%
BOV-P
1
188
4
2.1%
BOV-POSTM
1
61
15
24.6%
Wales
43
714
109
15.3%
All GB
46
1,136
136
12.0 %
Table 8a Number of Cattle Antibody Tests June 2024
Table 8b Number of Cattle Antibody Tests 2024
Country
County
Test Reason
Num Submissions Num Samples Tested Num Positive Samples % Positive
England
Cumbria
BOV-OTHER
4
885
22
2.5%
Devon
BOV-OTHER
3
422
27
6.4%
Oxfordshire
BOV-P
1
114
10
8.8%
England
8
1,421
59
4.2%
Wales
Carmarthenshire
BOV-IR-C
26
258
43
16.7%
BOV-IR-EX
5
18
6
33.3%
BOV-OTHER
1
7
0
0
BOV-P
1
57
0
0
Ceredigion
BOV-IR-C
13
61
10
16.4%
BOV-IR-EX
6
48
15
31.3%
North East Wales
BOV-IR-C
13
81
18
22.2%
BOV-IR-EX
4
13
2
15.4%
BOV-OTHER
2
45
6
13.3%
BOV-P
3
111
7
6.3%
North West Wales
BOV-IR-C
1
5
0
0
Pembrokeshire
BOV-IR-C
101
1,155
223
19.3%
BOV-IR-EX
18
90
32
35.6%
BOV-OTHER
3
120
4
3.3%
BOV-P
3
172
12
7.0%
Powys
BOV-IR-C
17
146
21
14.4%
BOV-IR-EX
3
20
1
5.0%
South Wales
BOV-IR-C
8
75
16
21.3%
BOV-IR-EX
1
16
4
25.0%
BOV-P
2
384
10
2.6%

Country
County
Test Reason
Num Submissions Num Samples Tested Num Positive Samples % Positive
BOV-POSTM
1
61
15
24.6%
Wales
232
2,943
445
15.1%
All GB
240
4,364
504
11.5 %