Monthly Report: Surveillance Project SB4008 IFNg (TC0651 and TC0751) & Antibody (TC0077) tests for bovine tuberculosis- July 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 August 2024
215
1st July 2024 - 31st July 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
July 2024
%
Total 2024
%
Submissions
223
1570
Samples
Total (%)
19494
100.00 %
134356
100.00 %
England
13549
69.50 %
87993
65.49 %
Wales
3851
19.75 %
43152
32.12 %
Scotland
2094
10.74 %
3211
2.39 %
Parallel Tests
PAR-CHR
9
0.05 %
1047
0.78 %
PAR-CUL-N
0
0.00 %
382
0.28 %
PAR-CUL-P
1273
6.53 %
4217
3.14 %
PAR-HERD-S
0
0.00 %
44
0.03 %
PAR-IR-EX
14
0.07 %
221
0.16 %
PAR-IR-SEV
286
1.47 %
2098
1.56 %
PAR-NEW-IN
4782
24.53 %
28269
21.04 %
PAR-OTHER
228
1.17 %
4110
3.06 %
PAR-PERSIS
1005
5.16 %
23886
17.78 %
PAR-POSTM
0
0.00 %
PAR-RAPID
37
0.19 %
460
0.34 %
PAR-RECUR
10051
51.56 %
63788
47.48 %
Total(% of all samples)
17685
90.72 %
128522
95.66 %
Serial/Extended Tests
SER-ANOM
0
0.00 %
SER-FLEXI
1805
9.26 %
5562
4.14 %
SER-FRAUD
0
0.00 %
SER-NSR
4
0.02 %
4
0.00 %
SER-OTHER
0
0.00 %
268
0.20 %
Total(% of all samples)
1809
9.28 %
5834
4.34 %
Total
19494
100.00 %
134356
100.00 %
Retests
Total (% of all samples)
1125
5.77 %
9414
7.01 %
England
851
4.37 %
6554
4.88 %
Wales
183
0.94 %
2654
1.98 %
Scotland
91
0.47 %
206
0.15 %
Resamples
Total (% of all samples)
792
4.06 %
7803
5.81 %
England
587
3.01 %
5476
4.08 %
Wales
140
0.72 %
2163
1.61 %
Scotland
65
0.33 %
164
0.12 %
Rejects
Total (% of all samples)
142
0.73 %
1322
0.98 %
England
139
0.71 %
1115
0.83 %
Wales
2
0.01 %
203
0.15 %
Scotland
1
0.01 %
4
0.00 %
Table 1. Monthly Totals for July 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-P
PAR-IR-EX
PAR-IR-SEV
PAR-NEW-IN
PAR-OTHER
PAR-PERSIS
PAR-RAPID
PAR-RECUR
SER-FLEXI
SER-NSR
Breakdown of
Reason for
submission
PAR-CHR
9
0.0 %
PAR-CUL-P
1273
6.5 %
PAR-IR-EX
14
0.1 %
PAR-IR-SEV
286
1.5 %
PAR-NEW-IN
4782
24.5 %
PAR-OTHER
228
1.2 %
PAR-PERSIS
1005
5.2 %
PAR-RAPID
37
0.2 %
PAR-RECUR
10051
51.6 %
SER-FLEXI
1805
9.3 %
SER-NSR
4
0.0 %
Total
19494
100.00 %
Figure 1. Number of samples submitted in each category during July 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
Kirkcudbright
S Wales
S Glamorgan
Powys
Pembs
NE Wales
Mid Glamorgan
Gwynedd
Gwent
Ceredigion
Carms
Warks
Staffs
Somerset excl N
Shropshire
Oxon
Notts
Northants
Lincs
Leics & Rut
Herts
Heref
Hampshire
Gloucs
E Sussex
Dorset
Devon
Cumbria
Corn & Scilly
Cheshire
Bucks
Avon
Scotland
Wales
England
SER-NSR
SER-FLEXI
PAR-RECUR
PAR-RAPID
PAR-PERSIS
PAR-OTHER
PAR-NEW-IN
PAR-IR-SEV
PAR-IR-EX
PAR-CUL-P
PAR-CHR
Breakdown of
Samples
submitted by
County
Figure 2. Number of samples submitted in each category by County during July 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
16000
Wigtown
West lothian
Kirkcudbright
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-NSR
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
4
409
2.10 %
6
1.47 %
365
89.24 %
45
11.00 %
38
9.29 %
0
0.00 %
Corn & Scilly
PAR-PERSIS
1
5
0.03 %
0
0.00 %
5
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-RECUR
7
835
4.28 %
34
4.07 %
685
82.04 %
27
3.23 %
15
1.80 %
101
12.10 %
SER-FLEXI
1
23
0.12 %
1
4.35 %
21
91.30 %
1
4.35 %
1
4.35 %
0
0.00 %
Devon
PAR-CUL-P
1
389
2.00 %
19
4.88 %
351
90.23 %
38
9.77 %
19
4.88 %
0
0.00 %
PAR-PERSIS
1
57
0.29 %
1
1.75 %
48
84.21 %
11
19.30 %
8
14.04 %
0
0.00 %
PAR-RECUR
8
1,911
9.80 %
51
2.67 %
1731
90.58 %
127
6.65 %
93
4.87 %
36
1.88 %
Dorset
PAR-RECUR
4
280
1.44 %
20
7.14 %
249
88.93 %
18
6.43 %
11
3.93 %
0
0.00 %
Gloucs
PAR-RECUR
1
34
0.17 %
0
0.00 %
27
79.41 %
7
20.59 %
7
20.59 %
0
0.00 %
Heref
PAR-RECUR
1
219
1.12 %
32
14.61 %
180
82.19 %
7
3.20 %
7
3.20 %
0
0.00 %
Shropshire
PAR-PERSIS
1
8
0.04 %
0
0.00 %
7
87.50 %
1
12.50 %
1
12.50 %
0
0.00 %
PAR-RECUR
5
772
3.96 %
11
1.42 %
719
93.13 %
71
9.20 %
42
5.44 %
0
0.00 %
Somerset excl N
PAR-CUL-P
2
23
0.12 %
0
0.00 %
19
82.61 %
4
17.39 %
4
17.39 %
0
0.00 %
PAR-RECUR
4
1,324
6.79 %
58
4.38 %
1240
93.66 %
45
3.40 %
26
1.96 %
0
0.00 %
Staffs
PAR-CHR
1
9
0.05 %
0
0.00 %
7
77.78 %
3
33.33 %
2
22.22 %
0
0.00 %
PAR-RECUR
12
2,365
12.13 %
78
3.30 %
2185
92.39 %
137
5.79 %
101
4.27 %
1
0.04 %
England - Edge
Bucks
PAR-NEW-IN
3
94
0.48 %
6
6.38 %
79
84.04 %
10
10.64 %
9
9.57 %
0
0.00 %
Cheshire
PAR-CUL-P
4
861
4.42 %
11
1.28 %
831
96.52 %
35
4.07 %
19
2.21 %
0
0.00 %
PAR-RECUR
1
233
1.20 %
8
3.43 %
221
94.85 %
5
2.15 %
4
1.72 %
0
0.00 %
SER-FLEXI
7
1,388
7.12 %
47
3.39 %
1276
91.93 %
90
6.48 %
65
4.68 %
0
0.00 %
E Sussex
PAR-NEW-IN
3
348
1.79 %
23
6.61 %
305
87.64 %
29
8.33 %
20
5.75 %
0
0.00 %
Hampshire
PAR-NEW-IN
3
101
0.52 %
10
9.90 %
80
79.21 %
11
10.89 %
11
10.89 %
0
0.00 %
Leics & Rut
PAR-NEW-IN
4
301
1.54 %
3
1.00 %
287
95.35 %
18
5.98 %
11
3.65 %
0
0.00 %
Northants
PAR-NEW-IN
3
159
0.82 %
1
0.63 %
140
88.05 %
21
13.21 %
18
11.32 %
0
0.00 %
Notts
PAR-NEW-IN
1
63
0.32 %
6
9.52 %
56
88.89 %
1
1.59 %
1
1.59 %
0
0.00 %
Oxon
PAR-NEW-IN
2
99
0.51 %
1
1.01 %
80
80.81 %
27
27.27 %
17
17.17 %
1
1.01 %
Table 2a. Summary by County for July 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 July 2024 Cont.
Country
County
Submission
Reasons*
No.
subs
Samples
Gamma Positive
Gamma Negatives
Retest*
Resample
Reject
n
% of total
n
%
n
%
n
%
PAR-RECUR
4
261
1.34 %
8
3.07 %
243
93.10 %
12
4.60 %
10
3.83 %
0
0.00 %
Warks
PAR-RECUR
2
269
1.38 %
20
7.43 %
242
89.96 %
10
3.72 %
7
2.60 %
0
0.00 %
England - LRA
Cumbria
PAR-NEW-IN
1
114
0.58 %
4
3.51 %
104
91.23 %
6
5.26 %
6
5.26 %
0
0.00 %
SER-NSR
1
4
0.02 %
0
0.00 %
4
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
Herts
PAR-NEW-IN
3
144
0.74 %
0
0.00 %
138
95.83 %
13
9.03 %
6
4.17 %
0
0.00 %
Lincs
PAR-NEW-IN
2
96
0.49 %
4
4.17 %
88
91.67 %
8
8.33 %
4
4.17 %
0
0.00 %
PAR-PERSIS
2
131
0.67 %
5
3.82 %
123
93.89 %
8
6.11 %
3
2.29 %
0
0.00 %
SER-FLEXI
3
220
1.13 %
4
1.82 %
215
97.73 %
5
2.27 %
1
0.45 %
0
0.00 %
England
103
13549
69.50 %
472
3.48 %
12351
91.16 %
851
6.28 %
587
4.33 %
139
1.03 %
Wales - High TB
Carms
PAR-IR-SEV
5
61
0.31 %
19
31.15 %
40
65.57 %
2
3.28 %
2
3.28 %
0
0.00 %
PAR-PERSIS
2
132
0.68 %
31
23.48 %
98
74.24 %
6
4.55 %
3
2.27 %
0
0.00 %
PAR-RAPID
4
6
0.03 %
2
33.33 %
4
66.67 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-RECUR
5
189
0.97 %
6
3.17 %
178
94.18 %
9
4.76 %
5
2.65 %
0
0.00 %
Ceredigion
PAR-IR-EX
1
2
0.01 %
0
0.00 %
2
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-IR-SEV
3
31
0.16 %
19
61.29 %
12
38.71 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-RAPID
1
1
0.01 %
0
0.00 %
1
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-RECUR
3
195
1.00 %
8
4.10 %
172
88.21 %
17
8.72 %
14
7.18 %
1
0.51 %
Gwent
PAR-PERSIS
2
287
1.47 %
26
9.06 %
255
88.85 %
8
2.79 %
6
2.09 %
0
0.00 %
PAR-RAPID
2
11
0.06 %
6
54.55 %
5
45.45 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-RECUR
1
1
0.01 %
0
0.00 %
1
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
Pembs
PAR-IR-EX
2
8
0.04 %
4
50.00 %
4
50.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-IR-SEV
11
87
0.45 %
26
29.89 %
59
67.82 %
3
3.45 %
2
2.30 %
0
0.00 %
PAR-OTHER
2
228
1.17 %
40
17.54 %
183
80.26 %
11
4.82 %
5
2.19 %
0
0.00 %
PAR-PERSIS
10
282
1.45 %
25
8.87 %
241
85.46 %
19
6.74 %
15
5.32 %
1
0.35 %
PAR-RAPID
7
12
0.06 %
4
33.33 %
7
58.33 %
1
8.33 %
1
8.33 %
0
0.00 %
PAR-RECUR
5
693
3.55 %
23
3.32 %
648
93.51 %
29
4.18 %
22
3.17 %
0
0.00 %
Powys
PAR-IR-EX
1
3
0.02 %
0
0.00 %
3
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-IR-SEV
10
78
0.40 %
8
10.26 %
67
85.90 %
3
3.85 %
3
3.85 %
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 July 2024 Cont.
Country
County
Submission
Reasons*
No.
subs
Samples
Gamma Positive
Gamma Negatives
Retest*
Resample
Reject
n
% of total
n
%
n
%
n
%
PAR-PERSIS
1
7
0.04 %
0
0.00 %
4
57.14 %
4
57.14 %
3
42.86 %
0
0.00 %
PAR-RAPID
2
4
0.02 %
1
25.00 %
3
75.00 %
0
0.00 %
0
0.00 %
0
0.00 %
S Wales
PAR-IR-SEV
1
5
0.03 %
2
40.00 %
2
40.00 %
1
20.00 %
1
20.00 %
0
0.00 %
Wales - Intermediate TB
Carms
PAR-RECUR
1
61
0.31 %
4
6.56 %
55
90.16 %
2
3.28 %
2
3.28 %
0
0.00 %
Mid Glamorgan
PAR-IR-SEV
1
2
0.01 %
1
50.00 %
1
50.00 %
0
0.00 %
0
0.00 %
0
0.00 %
NE Wales
PAR-IR-EX
1
1
0.01 %
0
0.00 %
1
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-IR-SEV
2
9
0.05 %
1
11.11 %
8
88.89 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-NEW-IN
9
580
2.98 %
14
2.41 %
545
93.97 %
29
5.00 %
21
3.62 %
0
0.00 %
PAR-PERSIS
6
96
0.49 %
2
2.08 %
87
90.63 %
7
7.29 %
7
7.29 %
0
0.00 %
SER-FLEXI
3
174
0.89 %
6
3.45 %
161
92.53 %
8
4.60 %
7
4.02 %
0
0.00 %
Powys
PAR-IR-SEV
1
9
0.05 %
1
11.11 %
8
88.89 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-NEW-IN
1
8
0.04 %
0
0.00 %
8
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
S Glamorgan
PAR-RAPID
1
2
0.01 %
1
50.00 %
1
50.00 %
0
0.00 %
0
0.00 %
0
0.00 %
Wales - Low TB
Gwynedd
PAR-NEW-IN
3
10
0.05 %
0
0.00 %
8
80.00 %
2
20.00 %
2
20.00 %
0
0.00 %
PAR-RAPID
1
1
0.01 %
0
0.00 %
0
0.00 %
1
100.00 %
1
100.00 %
0
0.00 %
NE Wales
PAR-IR-SEV
1
4
0.02 %
3
75.00 %
1
25.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-NEW-IN
4
571
2.93 %
12
2.10 %
541
94.75 %
21
3.68 %
18
3.15 %
0
0.00 %
Wales
116
3851
19.75 %
295
7.66 %
3414
88.65 %
183
4.75 %
140
3.64 %
2
0.05 %
Scotland - Scotland
Kirkcudbright
PAR-NEW-IN
4
2,094
10.74 %
58
2.77 %
1970
94.08 %
91
4.35 %
65
3.10 %
1
0.05 %
Scotland
4
2094
10.74 %
58
2.77 %
1970
94.08 %
91
4.35 %
65
3.10 %
1
0.05 %
Grand Total
Sum:
223
19494
825
17735
1125
792
142
*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
0.25 %
47
14.11 %
264
79.28 %
24
7.21 %
22
6.61 %
0
0.00 %
PAR-PERSIS
5
756
0.56 %
91
12.04 %
621
82.14 %
48
6.35 %
44
5.82 %
0
0.00 %
PAR-RECUR
22
2,767
2.06 %
151
5.46 %
2455
88.72 %
196
7.08 %
159
5.75 %
2
0.07 %
Corn & Scilly
PAR-CUL-P
2
891
0.66 %
35
3.93 %
805
90.35 %
58
6.51 %
51
5.72 %
0
0.00 %
PAR-OTHER
3
947
0.70 %
98
10.35 %
766
80.89 %
97
10.24 %
83
8.76 %
0
0.00 %
PAR-PERSIS
12
1,496
1.11 %
124
8.29 %
1223
81.75 %
169
11.30 %
148
9.89 %
1
0.07 %
PAR-RECUR
46
4,589
3.42 %
296
6.45 %
3757
81.87 %
485
10.57 %
431
9.39 %
105
2.29 %
SER-FLEXI
5
68
0.05 %
13
19.12 %
51
75.00 %
3
4.41 %
3
4.41 %
1
1.47 %
Devon
PAR-CHR
5
458
0.34 %
10
2.18 %
411
89.74 %
41
8.95 %
36
7.86 %
1
0.22 %
PAR-CUL-N
5
240
0.18 %
13
5.42 %
213
88.75 %
17
7.08 %
14
5.83 %
0
0.00 %
PAR-CUL-P
6
614
0.46 %
27
4.40 %
463
75.41 %
149
24.27 %
124
20.20 %
0
0.00 %
PAR-OTHER
6
316
0.24 %
10
3.16 %
263
83.23 %
47
14.87 %
43
13.61 %
0
0.00 %
PAR-PERSIS
12
1,774
1.32 %
91
5.13 %
1577
88.90 %
121
6.82 %
103
5.81 %
3
0.17 %
PAR-RECUR
59
9,810
7.30 %
417
4.25 %
8714
88.83 %
753
7.68 %
612
6.24 %
67
0.68 %
Dorset
PAR-CUL-P
1
6
0.00 %
0
0.00 %
6
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-PERSIS
1
588
0.44 %
29
4.93 %
552
93.88 %
16
2.72 %
7
1.19 %
0
0.00 %
PAR-RECUR
14
2,941
2.19 %
190
6.46 %
2631
89.46 %
147
5.00 %
118
4.01 %
2
0.07 %
SER-FLEXI
5
159
0.12 %
16
10.06 %
139
87.42 %
5
3.14 %
4
2.52 %
0
0.00 %
Gloucs
PAR-RECUR
25
3,614
2.69 %
150
4.15 %
3080
85.22 %
157
4.34 %
125
3.46 %
259
7.17 %
Heref
PAR-CUL-N
1
142
0.11 %
13
9.15 %
119
83.80 %
12
8.45 %
10
7.04 %
0
0.00 %
PAR-CUL-P
1
485
0.36 %
0
0.00 %
0
0.00 %
0
0.00 %
0
0.00 %
485
100.00 %
PAR-OTHER
1
150
0.11 %
10
6.67 %
131
87.33 %
11
7.33 %
9
6.00 %
0
0.00 %
PAR-PERSIS
3
565
0.42 %
25
4.42 %
525
92.92 %
18
3.19 %
15
2.65 %
0
0.00 %
PAR-RECUR
31
4,270
3.18 %
214
5.01 %
3723
87.19 %
376
8.81 %
332
7.78 %
1
0.02 %
Shropshire
PAR-CUL-P
3
370
0.28 %
39
10.54 %
320
86.49 %
11
2.97 %
11
2.97 %
0
0.00 %
PAR-OTHER
4
53
0.04 %
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
4
778
0.58 %
81
10.41 %
674
86.63 %
28
3.60 %
23
2.96 %
0
0.00 %
PAR-RECUR
41
7,145
5.32 %
250
3.50 %
6502
91.00 %
469
6.56 %
367
5.14 %
26
0.36 %
SER-FLEXI
4
430
0.32 %
87
20.23 %
307
71.40 %
44
10.23 %
36
8.37 %
0
0.00 %
Somerset excl N
PAR-CHR
2
78
0.06 %
4
5.13 %
73
93.59 %
2
2.56 %
1
1.28 %
0
0.00 %
PAR-CUL-P
8
990
0.74 %
43
4.34 %
880
88.89 %
65
6.57 %
56
5.66 %
11
1.11 %
PAR-OTHER
2
162
0.12 %
4
2.47 %
141
87.04 %
18
11.11 %
17
10.49 %
0
0.00 %
PAR-PERSIS
2
116
0.09 %
16
13.79 %
83
71.55 %
18
15.52 %
16
13.79 %
1
0.86 %
PAR-RECUR
26
3,632
2.70 %
195
5.37 %
3265
89.90 %
198
5.45 %
166
4.57 %
6
0.17 %
SER-FLEXI
1
56
0.04 %
3
5.36 %
52
92.86 %
2
3.57 %
1
1.79 %
0
0.00 %
Staffs
PAR-CHR
3
178
0.13 %
3
1.69 %
164
92.13 %
16
8.99 %
11
6.18 %
0
0.00 %
PAR-PERSIS
2
233
0.17 %
53
22.75 %
162
69.53 %
27
11.59 %
18
7.73 %
0
0.00 %
PAR-RECUR
33
4,903
3.65 %
185
3.77 %
4458
90.92 %
307
6.26 %
255
5.20 %
5
0.10 %
Wiltshire
PAR-OTHER
1
470
0.35 %
13
2.77 %
442
94.04 %
23
4.89 %
15
3.19 %
0
0.00 %
PAR-RECUR
25
4,322
3.22 %
176
4.07 %
3965
91.74 %
199
4.60 %
161
3.73 %
20
0.46 %
England - Edge
Berks
PAR-NEW-IN
4
386
0.29 %
25
6.48 %
345
89.38 %
17
4.40 %
13
3.37 %
3
0.78 %
Bucks
PAR-NEW-IN
11
584
0.43 %
25
4.28 %
525
89.90 %
41
7.02 %
33
5.65 %
1
0.17 %
PAR-RECUR
4
333
0.25 %
20
6.01 %
293
87.99 %
24
7.21 %
20
6.01 %
0
0.00 %
Cheshire
PAR-CUL-P
4
861
0.64 %
11
1.28 %
831
96.52 %
35
4.07 %
19
2.21 %
0
0.00 %
PAR-NEW-IN
2
1,061
0.79 %
32
3.02 %
792
74.65 %
287
27.05 %
237
22.34 %
0
0.00 %
PAR-OTHER
4
1,041
0.77 %
39
3.75 %
985
94.62 %
24
2.31 %
17
1.63 %
0
0.00 %
PAR-PERSIS
15
1,898
1.41 %
120
6.32 %
1572
82.82 %
232
12.22 %
206
10.85 %
0
0.00 %
PAR-RECUR
1
233
0.17 %
8
3.43 %
221
94.85 %
5
2.15 %
4
1.72 %
0
0.00 %
SER-FLEXI
7
1,388
1.03 %
47
3.39 %
1276
91.93 %
90
6.48 %
65
4.68 %
0
0.00 %
Derbyshire
PAR-NEW-IN
3
32
0.02 %
1
3.13 %
24
75.00 %
7
21.88 %
7
21.88 %
0
0.00 %
PAR-RECUR
10
1,470
1.09 %
36
2.45 %
1341
91.22 %
106
7.21 %
91
6.19 %
2
0.14 %
E Sussex
PAR-NEW-IN
13
1,558
1.16 %
79
5.07 %
1388
89.09 %
112
7.19 %
90
5.78 %
1
0.06 %
Hampshire
PAR-NEW-IN
5
360
0.27 %
11
3.06 %
328
91.11 %
26
7.22 %
21
5.83 %
0
0.00 %
Leics & Rut
PAR-NEW-IN
30
3,788
2.82 %
113
2.98 %
3371
88.99 %
365
9.64 %
303
8.00 %
1
0.03 %
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
%
Northants
PAR-NEW-IN
22
2,058
1.53 %
58
2.82 %
1847
89.75 %
143
6.95 %
126
6.12 %
27
1.31 %
PAR-RECUR
1
197
0.15 %
1
0.51 %
180
91.37 %
18
9.14 %
16
8.12 %
0
0.00 %
Notts
PAR-NEW-IN
7
499
0.37 %
18
3.61 %
425
85.17 %
59
11.82 %
56
11.22 %
0
0.00 %
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
7
654
0.49 %
30
4.59 %
553
84.56 %
83
12.69 %
70
10.70 %
1
0.15 %
PAR-PERSIS
1
201
0.15 %
15
7.46 %
174
86.57 %
22
10.95 %
12
5.97 %
0
0.00 %
PAR-RECUR
14
1,573
1.17 %
50
3.18 %
1442
91.67 %
93
5.91 %
77
4.90 %
4
0.25 %
Warks
PAR-OTHER
4
84
0.06 %
15
17.86 %
60
71.43 %
10
11.90 %
9
10.71 %
0
0.00 %
PAR-RECUR
7
896
0.67 %
46
5.13 %
755
84.26 %
83
9.26 %
95
10.60 %
0
0.00 %
England - LRA
Beds
PAR-NEW-IN
2
33
0.02 %
2
6.06 %
9
27.27 %
5
15.15 %
5
15.15 %
17
51.52 %
Cumbria
PAR-NEW-IN
11
1,677
1.25 %
32
1.91 %
1557
92.84 %
98
5.84 %
87
5.19 %
1
0.06 %
SER-NSR
1
4
0.00 %
0
0.00 %
4
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
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
0.08 %
3
2.75 %
95
87.16 %
8
7.34 %
7
6.42 %
4
3.67 %
Herts
PAR-NEW-IN
5
347
0.26 %
10
2.88 %
318
91.64 %
26
7.49 %
19
5.48 %
0
0.00 %
Humberside
PAR-NEW-IN
2
83
0.06 %
0
0.00 %
75
90.36 %
10
12.05 %
8
9.64 %
0
0.00 %
Kent
SER-OTHER
2
248
0.18 %
1
0.40 %
240
96.77 %
9
3.63 %
6
2.42 %
1
0.40 %
Lancashire
PAR-NEW-IN
2
103
0.08 %
1
0.97 %
98
95.15 %
5
4.85 %
3
2.91 %
1
0.97 %
Lincs
PAR-NEW-IN
9
533
0.40 %
14
2.63 %
498
93.43 %
30
5.63 %
21
3.94 %
0
0.00 %
PAR-PERSIS
2
131
0.10 %
5
3.82 %
123
93.89 %
8
6.11 %
3
2.29 %
0
0.00 %
SER-FLEXI
4
323
0.24 %
4
1.24 %
268
82.97 %
5
1.55 %
1
0.31 %
50
15.48 %
Norfolk
PAR-NEW-IN
4
112
0.08 %
7
6.25 %
75
66.96 %
27
24.11 %
27
24.11 %
3
2.68 %
N Yorks
PAR-NEW-IN
4
507
0.38 %
7
1.38 %
465
91.72 %
38
7.50 %
34
6.71 %
1
0.20 %
W Sussex
PAR-NEW-IN
3
704
0.52 %
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
670
87993
65.49 %
4146
4.71 %
77256
87.80 %
6554
7.45 %
5476
6.22 %
1115
1.27 %
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
42
317
0.24 %
109
34.38 %
196
61.83 %
13
4.10 %
10
3.15 %
2
0.63 %
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-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
0.17 %
20
8.62 %
198
85.34 %
20
8.62 %
14
6.03 %
0
0.00 %
PAR-PERSIS
23
3,588
2.67 %
221
6.16 %
3249
90.55 %
136
3.79 %
111
3.09 %
7
0.20 %
PAR-RAPID
35
149
0.11 %
58
38.93 %
88
59.06 %
6
4.03 %
3
2.01 %
0
0.00 %
PAR-RECUR
20
3,604
2.68 %
94
2.61 %
3411
94.64 %
143
3.97 %
97
2.69 %
2
0.06 %
SER-FLEXI
3
59
0.04 %
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
6
29
0.02 %
16
55.17 %
13
44.83 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-IR-SEV
11
79
0.06 %
37
46.84 %
42
53.16 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-PERSIS
5
486
0.36 %
30
6.17 %
419
86.21 %
42
8.64 %
36
7.41 %
1
0.21 %
PAR-RAPID
5
8
0.01 %
2
25.00 %
6
75.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-RECUR
4
272
0.20 %
17
6.25 %
240
88.24 %
18
6.62 %
14
5.15 %
1
0.37 %
Gwent
PAR-IR-EX
3
19
0.01 %
8
42.11 %
9
47.37 %
2
10.53 %
2
10.53 %
0
0.00 %
PAR-IR-SEV
6
53
0.04 %
20
37.74 %
33
62.26 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-OTHER
4
30
0.02 %
2
6.67 %
25
83.33 %
4
13.33 %
3
10.00 %
0
0.00 %
PAR-PERSIS
7
463
0.34 %
40
8.64 %
413
89.20 %
12
2.59 %
10
2.16 %
0
0.00 %
PAR-RAPID
13
57
0.04 %
30
52.63 %
26
45.61 %
2
3.51 %
1
1.75 %
0
0.00 %
PAR-RECUR
16
1,068
0.79 %
39
3.65 %
989
92.60 %
46
4.31 %
40
3.75 %
0
0.00 %
SER-FLEXI
6
400
0.30 %
5
1.25 %
375
93.75 %
23
5.75 %
18
4.50 %
2
0.50 %
Pembs
PAR-IR-EX
20
78
0.06 %
34
43.59 %
43
55.13 %
1
1.28 %
1
1.28 %
0
0.00 %
PAR-IR-SEV
124
1,218
0.91 %
390
32.02 %
765
62.81 %
74
6.08 %
63
5.17 %
0
0.00 %
PAR-OTHER
9
551
0.41 %
66
11.98 %
468
84.94 %
26
4.72 %
17
3.09 %
0
0.00 %
PAR-PERSIS
64
7,639
5.69 %
473
6.19 %
6762
88.52 %
355
4.65 %
266
3.48 %
138
1.81 %
PAR-RAPID
53
164
0.12 %
52
31.71 %
103
62.80 %
10
6.10 %
9
5.49 %
0
0.00 %
PAR-RECUR
34
3,629
2.70 %
153
4.22 %
3285
90.52 %
232
6.39 %
182
5.02 %
9
0.25 %
SER-FLEXI
16
1,512
1.13 %
89
5.89 %
1289
85.25 %
153
10.12 %
132
8.73 %
2
0.13 %
Powys
PAR-IR-EX
4
23
0.02 %
4
17.39 %
18
78.26 %
2
8.70 %
1
4.35 %
0
0.00 %
PAR-IR-SEV
28
215
0.16 %
69
32.09 %
139
64.65 %
7
3.26 %
7
3.26 %
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-OTHER
2
73
0.05 %
2
2.74 %
66
90.41 %
7
9.59 %
4
5.48 %
1
1.37 %
PAR-PERSIS
6
799
0.59 %
44
5.51 %
697
87.23 %
66
8.26 %
58
7.26 %
0
0.00 %
PAR-RAPID
10
17
0.01 %
6
35.29 %
11
64.71 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-RECUR
18
1,155
0.86 %
64
5.54 %
1040
90.04 %
61
5.28 %
49
4.24 %
2
0.17 %
SER-FLEXI
2
177
0.13 %
26
14.69 %
98
55.37 %
60
33.90 %
53
29.94 %
0
0.00 %
S Wales
PAR-IR-SEV
2
22
0.02 %
6
27.27 %
15
68.18 %
1
4.55 %
1
4.55 %
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 %
PAR-RECUR
1
61
0.05 %
4
6.56 %
55
90.16 %
2
3.28 %
2
3.28 %
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-IR-SEV
1
2
0.00 %
1
50.00 %
1
50.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-RECUR
2
88
0.07 %
3
3.41 %
83
94.32 %
3
3.41 %
2
2.27 %
0
0.00 %
NE Wales
PAR-IR-EX
10
22
0.02 %
4
18.18 %
18
81.82 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-IR-SEV
28
134
0.10 %
33
24.63 %
91
67.91 %
10
7.46 %
10
7.46 %
0
0.00 %
PAR-NEW-IN
45
3,781
2.81 %
118
3.12 %
3440
90.98 %
265
7.01 %
211
5.58 %
12
0.32 %
PAR-OTHER
1
1
0.00 %
0
0.00 %
1
100.00 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-PERSIS
29
2,314
1.72 %
109
4.71 %
2115
91.40 %
101
4.36 %
81
3.50 %
9
0.39 %
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
0.44 %
18
3.06 %
527
89.63 %
45
7.65 %
43
7.31 %
0
0.00 %
SER-FLEXI
7
743
0.55 %
35
4.71 %
678
91.25 %
39
5.25 %
30
4.04 %
0
0.00 %
Powys
PAR-IR-SEV
3
16
0.01 %
2
12.50 %
14
87.50 %
0
0.00 %
0
0.00 %
0
0.00 %
PAR-NEW-IN
7
730
0.54 %
17
2.33 %
686
93.97 %
29
3.97 %
25
3.42 %
2
0.27 %
PAR-RAPID
2
18
0.01 %
4
22.22 %
11
61.11 %
3
16.67 %
3
16.67 %
0
0.00 %
PAR-RECUR
5
411
0.31 %
26
6.33 %
365
88.81 %
25
6.08 %
20
4.87 %
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 Glamorgan
PAR-RAPID
4
16
0.01 %
5
31.25 %
11
68.75 %
1
6.25 %
0
0.00 %
0
0.00 %
SER-FLEXI
1
75
0.06 %
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
47
2,628
1.96 %
77
2.93 %
2330
88.66 %
255
9.70 %
217
8.26 %
4
0.15 %
PAR-RAPID
3
3
0.00 %
0
0.00 %
1
33.33 %
2
66.67 %
2
66.67 %
0
0.00 %
PAR-RECUR
1
18
0.01 %
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
5
27
0.02 %
12
44.44 %
14
51.85 %
1
3.70 %
1
3.70 %
0
0.00 %
PAR-NEW-IN
25
2,682
2.00 %
80
2.98 %
2347
87.51 %
282
10.51 %
250
9.32 %
5
0.19 %
PAR-PERSIS
2
59
0.04 %
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
0.13 %
3
1.75 %
148
86.55 %
19
11.11 %
19
11.11 %
1
0.58 %
SER-FLEXI
3
162
0.12 %
30
18.52 %
104
64.20 %
31
19.14 %
28
17.28 %
0
0.00 %
Wales
887
43152
32.12 %
2899
6.72 %
37887
87.80 %
2654
6.15 %
2163
5.01 %
203
0.47 %
Scotland - Scotland
Ayrshire
PAR-NEW-IN
2
248
0.18 %
5
2.02 %
236
95.16 %
8
3.23 %
6
2.42 %
1
0.40 %
Kirkcudbright
PAR-NEW-IN
4
2,094
1.56 %
58
2.77 %
1970
94.08 %
91
4.35 %
65
3.10 %
1
0.05 %
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
0.63 %
20
2.38 %
738
87.65 %
96
11.40 %
82
9.74 %
2
0.24 %
Scotland
13
3211
2.39 %
83
2.58 %
2960
92.18 %
206
6.42 %
164
5.11 %
4
0.12 %
Grand Total
Sum:
xx-xxxx-xxxx
7128
118103
9414
7803
1322
*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 July 2024
Country
Protocol
No
submissions Samples
Positive
Negatives
Retest*
Resample
Reject
n
% of total n
%
n
%
n
%
n
%
n
%
England
Parallel
91
11914
87.9%
420
3.5%
10835
90.9%
755
6.3%
520
4.4%
139
1.2%
Serial/Extended
12
1635
12.1%
52
3.2%
1516
92.7%
96
5.9%
67
4.1%
0
0.0 %
Total
103
13549
100.0%
472
3.5%
12351
91.2%
851
6.3%
587
4.3%
139
1.0%
Scotland
Parallel
4
2094
100.0%
58
2.8%
1970
94.1%
91
4.3%
65
3.1%
1
0.0%
Serial/Extended
0
0
0.0 %
0
0.0 %
0
0.0 %
0
0.0 %
0
0.0 %
0
0.0 %
Total
4
2094
100.0%
58
2.8%
1970
94.1%
91
4.3%
65
3.1%
1
0.0%
Wales
Parallel
113
3677
95.5%
289
7.9%
3253
88.5%
175
4.8%
133
3.6%
2
0.1%
Serial/Extended
3
174
4.5%
6
3.4%
161
92.5%
8
4.6%
7
4.0%
0
0.0 %
Total
116
3851
100.0%
295
7.7%
3414
88.7%
183
4.8%
140
3.6%
2
0.1%
GB
Parallel
208
17685
90.7%
767
4.3%
16058
90.8%
1021
5.8%
718
4.1%
142
0.8%
Serial/Extended
15
1809
9.3%
58
3.2%
1677
92.7%
104
5.7%
74
4.1%
0
0.0 %
Total
223
19494
100.0%
825
4.2%
17735
91.0%
1125
5.8%
792
4.1%
142
0.7%
103.00
116.00
4.00
* 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
638
85297
96.9%
3975
4.7%
74899
87.8%
6396
7.5%
5360
6.3%
1063
1.2%
Serial/Extended
32
2696
3.1%
171
6.3%
2357
87.4%
158
5.9%
116
4.3%
52
1.9%
Total
670
87993
100.0%
4146
4.7%
77256
87.8%
6554
7.4%
5476
6.2%
1115
1.3%
Scotland
Parallel
13
3211
100.0%
83
2.6%
2960
92.2%
206
6.4%
164
5.1%
4
0.1%
Serial/Extended
0
0
0.0 %
0
0.0 %
0
0.0 %
0
0.0 %
0
0.0 %
0
0.0 %
Total
13
3211
100.0%
83
2.6%
2960
92.2%
206
6.4%
164
5.1%
4
0.1%
Wales
Parallel
846
40014
92.7%
2680
6.7%
35238
88.1%
2343
5.9%
1898
4.7%
198
0.5%
Serial/Extended
41
3138
7.3%
219
7.0%
2649
84.4%
311
9.9%
265
8.4%
5
0.2%
Total
887
43152
100.0%
2899
6.7%
37887
87.8%
2654
6.2%
2163
5.0%
203
0.5%
GB
Parallel
1497 128522
95.7%
6738
5.2% 113097
88.0%
8945
7.0%
7422
5.8%
1265
1.0%
Serial/Extended
73
5834
4.3%
390
6.7%
5006
85.8%
469
8.0%
381
6.5%
57
1.0%
Total
xx-xxxx-xxxx
100.0%
7128
5.3% 118103
87.9%
9414
7.0%
7803
5.8%
1322
1.0%
670.00
887.00
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
14
1805
9.3%
58
3.2%
1673
92.7%
104
5.8 %
74
4.1 %
0
Parallel – chronic breakdown
1
9
0.0%
0
0.0 %
7
77.8%
3
33.3 %
2
22.2 %
0
Parallel - IRs in Exit Strategy for persistent her
5
14
0.1%
4
28.6%
10
71.4%
0
0
0
Parallel New Infection
46
4782
24.5%
142
3.0%
4429
92.6%
287
6.0 %
209
4.4 %
2
0.0 %
Parallel - Other
2
228
1.2%
40
17.5%
183
80.3%
11
4.8 %
5
2.2 %
0
Parallel Persistent Infection
26
1005
5.2%
90
9.0%
868
86.4%
64
6.4 %
46
4.6 %
1
0.1 %
Parallel - persistent infection cull area
7
1273
6.5%
30
2.4%
1201
94.3%
77
6.0 %
42
3.3 %
0
Parallel - Rapid Testing Two-times IRs
18
37
0.2%
14
37.8%
21
56.8%
2
5.4 %
2
5.4 %
0
Parallel - Recurrent breakdowns
68
10051
51.6%
367
3.7%
9141
90.9%
568
5.7 %
404
4.0 %
139
1.4 %
Parallel - severe IRs - in persistent herds
35
286
1.5%
80
28.0%
198
69.2%
9
3.1 %
8
2.8 %
0
Serial - Suspected NSR Herd
1
4
0.0%
0
0.0 %
4
100.0%
0
0
0
Total
223
19494
100.0%
825
4.2%
17735
91.0%
1125
5.8 %
792
4.1 %
142
0.7 %
Table 4a. Summaryof IFN Gamma results by submission reason (July 2024)
England - HRA
Extended Flexible IFN-GAMMA test
1
23
0.1%
1
4.3%
21
91.3%
1
4.3 %
1
4.3 %
0
Parallel – chronic breakdown
1
9
0.0%
0
0.0 %
7
77.8%
3
33.3 %
2
22.2 %
0
Parallel Persistent Infection
3
70
0.4%
1
1.4%
60
85.7%
12
17.1 %
9
12.9 %
0
Parallel - persistent infection cull area
3
412
2.1%
19
4.6%
370
89.8%
42
10.2 %
23
5.6 %
0
Parallel - Recurrent breakdowns
46
8149
41.8%
290
3.6%
7381
90.6%
484
5.9 %
340
4.2 %
138
1.7 %
England - HRA
54
8663
44.4%
311
3.6%
7839
90.5%
542
6.3 %
375
4.3 %
138
1.6 %
England - Edge
Extended Flexible IFN-GAMMA test
7
1388
7.1%
47
3.4%
1276
91.9%
90
6.5 %
65
4.7 %
0
Parallel New Infection
19
1165
6.0%
50
4.3%
1027
88.2%
117
10.0 %
87
7.5 %
1
0.1 %
Parallel - persistent infection cull area
4
861
4.4%
11
1.3%
831
96.5%
35
4.1 %
19
2.2 %
0
Parallel - Recurrent breakdowns
7
763
3.9%
36
4.7%
706
92.5%
27
3.5 %
21
2.8 %
0
England - Edge
37
4177
21.4%
144
3.4%
3840
91.9%
269
6.4 %
192
4.6 %
1
0.0 %
England - LRA
Extended Flexible IFN-GAMMA test
3
220
1.1%
4
1.8%
215
97.7%
5
2.3 %
1
0.5 %
0
Parallel New Infection
6
354
1.8%
8
2.3%
330
93.2%
27
7.6 %
16
4.5 %
0
Parallel Persistent Infection
2
131
0.7%
5
3.8%
123
93.9%
8
6.1 %
3
2.3 %
0
Serial - Suspected NSR Herd
1
4
0.0%
0
0.0 %
4
100.0%
0
0
0
England - LRA
12
709
3.6%
17
2.4%
672
94.8%
40
5.6 %
20
2.8 %
0
Wales - High TB
Parallel - IRs in Exit Strategy for persistent her
4
13
0.1%
4
30.8%
9
69.2%
0
0
0
Parallel - Other
2
228
1.2%
40
17.5%
183
80.3%
11
4.8 %
5
2.2 %
0
Parallel Persistent Infection
15
708
3.6%
82
11.6%
598
84.5%
37
5.2 %
27
3.8 %
1
0.1 %
Parallel - Rapid Testing Two-times IRs
16
34
0.2%
13
38.2%
20
58.8%
1
2.9 %
1
2.9 %
0
Parallel - Recurrent breakdowns
14
1078
5.5%
37
3.4%
999
92.7%
55
5.1 %
41
3.8 %
1
0.1 %
Parallel - severe IRs - in persistent herds
30
262
1.3%
74
28.2%
180
68.7%
9
3.4 %
8
3.1 %
0
Wales - High TB
81
2323
11.9%
250
10.8%
1989
85.6%
113
4.9 %
82
3.5 %
2
0.1 %
Wales - Intermediate TB
Extended Flexible IFN-GAMMA test
3
174
0.9%
6
3.4%
161
92.5%
8
4.6 %
7
4.0 %
0
Parallel - IRs in Exit Strategy for persistent her
1
1
0.0%
0
0.0 %
1
100.0%
0
0
0
Parallel New Infection
10
588
3.0%
14
2.4%
553
94.0%
29
4.9 %
21
3.6 %
0
Parallel Persistent Infection
6
96
0.5%
2
2.1%
87
90.6%
7
7.3 %
7
7.3 %
0
Parallel - Rapid Testing Two-times IRs
1
2
0.0%
1
50.0%
1
50.0%
0
0
0
Parallel - Recurrent breakdowns
1
61
0.3%
4
6.6%
55
90.2%
2
3.3 %
2
3.3 %
0
Parallel - severe IRs - in persistent herds
4
20
0.1%
3
15.0%
17
85.0%
0
0
0
Wales - Intermediate TB
26
942
4.8%
30
3.2%
875
92.9%
46
4.9 %
37
3.9 %
0
Wales - Low TB
Parallel New Infection
7
581
3.0%
12
2.1%
549
94.5%
23
4.0 %
20
3.4 %
0
Parallel - Rapid Testing Two-times IRs
1
1
0.0%
0
0.0 %
0
0.0 %
1
100.0 %
1
100.0 %
0
Parallel - severe IRs - in persistent herds
1
4
0.0%
3
75.0%
1
25.0%
0
0
0
Wales - Low TB
9
586
3.0%
15
2.6%
550
93.9%
24
4.1 %
21
3.6 %
0
Scotland - Scotland
Parallel New Infection
4
2094
10.7%
58
2.8%
1970
94.1%
91
4.3 %
65
3.1 %
1
0.0 %
Scotland - Scotland
4
2094
10.7%
58
2.8%
1970
94.1%
91
4.3 %
65
3.1 %
1
0.0 %

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
67
5562
4.1%
389
7.0%
4742
85.3%
460
8.3 %
375
6.7 %
56
1.0 %
Parallel – chronic breakdown
13
1047
0.8%
64
6.1%
912
87.1%
83
7.9 %
70
6.7 %
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
55
221
0.2%
92
41.6%
121
54.8%
9
4.1 %
8
3.6 %
0
Parallel New Infection
289
28269
21.0%
876
3.1%
25258
89.3%
2442
8.6 %
2046
7.2 %
89
0.3 %
Parallel - new infection cull area
6
382
0.3%
26
6.8%
332
86.9%
29
7.6 %
24
6.3 %
0
Parallel - Other
46
4110
3.1%
285
6.9%
3585
87.2%
295
7.2 %
239
5.8 %
1
0.0 %
Parallel Persistent Infection
197
23886
17.8%
1573
6.6%
20995
87.9%
1420
5.9 %
1158
4.8 %
160
0.7 %
Parallel - persistent infection cull area
25
4217
3.1%
155
3.7%
3305
78.4%
318
7.5 %
261
6.2 %
496
11.8 %
Parallel - Rapid Testing Two-times IRs
139
460
0.3%
165
35.9%
273
59.3%
27
5.9 %
21
4.6 %
1
0.2 %
Parallel - Recurrent breakdowns
469
63788
47.5%
2810
4.4%
56965
89.3%
4211
6.6 %
3498
5.5 %
515
0.8 %
Parallel - severe IRs - in persistent herds
256
2098
1.6%
686
32.7%
1317
62.8%
107
5.1 %
93
4.4 %
2
0.1 %
Serial - Other
5
268
0.2%
1
0.4%
260
97.0%
9
3.4 %
6
2.2 %
1
0.4 %
Serial - Suspected NSR Herd
1
4
0.0%
0
0.0 %
4
100.0%
0
0
0
Total
xx-xxxx-xxxx
100.0%
7128
5.3%
118103
87.9%
9414
7.0 %
7803
5.8 %
1322
1.0 %
Table 4b. Summary of IFN Gamma results by submission reason (Total 2024)
England - HRA
Extended Flexible IFN-GAMMA test
15
713
0.5%
119
16.7%
549
77.0%
54
7.6 %
44
6.2 %
1
0.1 %
Parallel – chronic breakdown
13
1047
0.8%
64
6.1%
912
87.1%
83
7.9 %
70
6.7 %
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
1.6%
141
6.7%
1782
84.9%
204
9.7 %
175
8.3 %
0
Parallel Persistent Infection
41
6306
4.7%
510
8.1%
5417
85.9%
445
7.1 %
374
5.9 %
5
0.1 %
Parallel - persistent infection cull area
21
3356
2.5%
144
4.3%
2474
73.7%
283
8.4 %
242
7.2 %
496
14.8 %
Parallel - Recurrent breakdowns
322
47993
35.7%
2224
4.6%
42550
88.7%
3287
6.8 %
2726
5.7 %
493
1.0 %
England - Edge
Extended Flexible IFN-GAMMA test
7
1388
1.0%
47
3.4%
1276
91.9%
90
6.5 %
65
4.7 %
0
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
104
10980
8.2%
392
3.6%
9598
87.4%
1140
10.4 %
956
8.7 %
34
0.3 %
Parallel - Other
8
1125
0.8%
54
4.8%
1045
92.9%
34
3.0 %
26
2.3 %
0
Parallel Persistent Infection
16
2099
1.6%
135
6.4%
1746
83.2%
254
12.1 %
218
10.4 %
0

Table 4b. Summary of IFN Gamma results by submission reason (Total 2024) Cont.
Parallel - persistent infection cull area
4
861
0.6%
11
1.3%
831
96.5%
35
4.1 %
19
2.2 %
0
Parallel - Recurrent breakdowns
37
4702
3.5%
161
3.4%
4232
90.0%
329
7.0 %
303
6.4 %
6
0.1 %
England - LRA
Extended Flexible IFN-GAMMA test
4
323
0.2%
4
1.2%
268
83.0%
5
1.5 %
1
0.3 %
50
15.5 %
Parallel New Infection
46
4208
3.1%
108
2.6%
3850
91.5%
263
6.3 %
222
5.3 %
28
0.7 %
Parallel Persistent Infection
2
131
0.1%
5
3.8%
123
93.9%
8
6.1 %
3
2.3 %
0
Serial - Other
5
268
0.2%
1
0.4%
260
97.0%
9
3.4 %
6
2.2 %
1
0.4 %
Serial - Suspected NSR Herd
1
4
0.0%
0
0.0 %
4
100.0%
0
0
0
England
670
87993
65.5%
4146
4.7%
77256
87.8%
6554
7.4 %
5476
6.2 %
1115
1.3 %
Wales - High TB
Extended Flexible IFN-GAMMA test
27
2148
1.6%
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
42
174
0.1%
70
40.2%
96
55.2%
9
5.2 %
8
4.6 %
0
Parallel New Infection
1
21
0.0%
1
4.8%
19
90.5%
2
9.5 %
1
4.8 %
0
Parallel - Other
20
886
0.7%
90
10.2%
757
85.4%
57
6.4 %
38
4.3 %
1
0.1 %
Parallel Persistent Infection
105
12975
9.7%
808
6.2%
11540
88.9%
611
4.7 %
481
3.7 %
146
1.1 %
Parallel - Rapid Testing Two-times IRs
117
396
0.3%
148
37.4%
235
59.3%
18
4.5 %
13
3.3 %
0
Parallel - Recurrent breakdowns
94
9756
7.3%
371
3.8%
8987
92.1%
501
5.1 %
383
3.9 %
15
0.2 %
Parallel - severe IRs - in persistent herds
213
1904
1.4%
631
33.1%
1190
62.5%
95
5.0 %
81
4.3 %
2
0.1 %
Wales - Intermediate TB
Extended Flexible IFN-GAMMA test
8
818
0.6%
59
7.2%
727
88.9%
41
5.0 %
32
3.9 %
0
Parallel - IRs in Exit Strategy for persistent herd
11
43
0.0%
21
48.8%
22
51.2%
0
0
0
Parallel New Infection
52
4511
3.4%
135
3.0%
4126
91.5%
294
6.5 %
236
5.2 %
14
0.3 %
Parallel - Other
1
1
0.0%
0
0.0 %
1
100.0%
0
0
0
Parallel Persistent Infection
31
2316
1.7%
110
4.7%
2116
91.4%
101
4.4 %
81
3.5 %
9
0.4 %
Parallel - Rapid Testing Two-times IRs
17
52
0.0%
14
26.9%
33
63.5%
5
9.6 %
4
7.7 %
1
1.9 %
Parallel - Recurrent breakdowns
14
1148
0.9%
51
4.4%
1030
89.7%
75
6.5 %
67
5.8 %
0
Parallel - severe IRs - in persistent herds
35
155
0.1%
37
23.9%
108
69.7%
10
6.5 %
10
6.5 %
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
73
5338
4.0%
157
2.9%
4705
88.1%
537
10.1 %
467
8.7 %
9
0.2 %
Parallel Persistent Infection
2
59
0.0%
5
8.5%
53
89.8%
1
1.7 %
1
1.7 %
0
Parallel - Rapid Testing Two-times IRs
5
12
0.0%
3
25.0%
5
41.7%
4
33.3 %
4
33.3 %
0
Parallel - Recurrent breakdowns
2
189
0.1%
3
1.6%
166
87.8%
19
10.1 %
19
10.1 %
1
0.5 %
Parallel - severe IRs - in persistent herds
8
39
0.0%
18
46.2%
19
48.7%
2
5.1 %
2
5.1 %
0
Wales
887
43152
32.1%
2899
6.7%
37887
87.8%
2654
6.2 %
2163
5.0 %
203
0.5 %

Table 4b. Summary of IFN Gamma results by submission reason (Total 2024) Cont.
Scotland - Scotland
Parallel New Infection
13
3211
2.4%
83
2.6%
2960
92.2%
206
6.4 %
164
5.1 %
4
0.1 %
Scotland
13
3211
2.4%
83
2.6%
2960
92.2%
206
6.4 %
164
5.1 %
4
0.1 %

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 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
5
0
0
0
0
69
3
0
18
0
753
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
4
0
10
1
958
0
71
0
0
May
207
15411
129
733
4
0
0
0
0
11
0
0
8
4
653
0
53
0
0
June
197
18101
133
797
24
0
0
0
0
31
0
2
17
1
706
14
2
0
0
July
223
19494
124
825
155
301
0
0
0
0
15
0
4
4
0
218
6
0
0
0
Totals (last
12 months)
2729
228090
1666
11627
163
440
0
0
0
0
664
31
7
159
6
9303
22
701
2
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
1126
150965
756
6963
240
0
0
0
0
638
16
3
96
3
5714
7
88
0
0
Scotland
45
7531
29
166
0
0
0
0
0
0
0
0
2
1
61
0
41
1
0
Wales
1558
69594
881
4498
200
0
0
0
0
26
15
4
61
2
3528
15
572
1
3
Totals
2729
228090
1666
11627
440
0
0
0
0
664
31
7
159
6
9303
22
701
2
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
99
124
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
July
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
18485
825
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
July
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
July
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
Warks
Staffs
Shropshire
Powys
Oxon
Northants
Mid Glamorgan
Leics & Rut
Herts
Hampshire
Gwent
E Sussex
Devon
Corn & Scilly
Ceredigion
Bucks
%Retested
%Resampled
Figure 6. Proportion of samples retested, or requiring a resample, during July 2024 (% submission per County)
County
%Resampled %Retested
Avon
9.29 %
11.00 %
Bucks
9.57 %
10.64 %
Carms
2.67 %
4.23 %
Ceredigion
6.11 %
7.42 %
Cheshire
3.55 %
5.24 %
Corn & Scilly
1.85 %
3.24 %
Cumbria
5.08 %
5.08 %
Devon
5.09 %
7.47 %
Dorset
3.93 %
6.43 %
E Sussex
5.75 %
8.33 %
Gloucs
20.59 %
20.59 %
Gwent
2.01 %
2.68 %
Gwynedd
27.27 %
27.27 %
Hampshire
10.89 %
10.89 %
Heref
3.20 %
3.20 %
Herts
4.17 %
9.03 %
Kirkcudbright
3.10 %
4.35 %
Leics & Rut
3.65 %
5.98 %
Lincs
1.79 %
4.70 %
Mid Glamorgan
NE Wales
3.69 %
4.53 %
Northants
11.32 %
13.21 %
Notts
1.59 %
1.59 %
Oxon
7.50 %
10.83 %
Pembs
3.44 %
4.81 %
Powys
5.50 %
6.42 %
S Glamorgan
Shropshire
5.51 %
9.23 %
Somerset excl
2.23 %
3.64 %
Staffs
4.34 %
5.90 %
S Wales
20.00 %
20.00 %
Warks
2.60 %
3.72 %

Country
No.
animals
No of IFNg+
animals
% Positive
animals
No. samples
No of IFNg+
samples
% Positive
samples
England
13414
472
3.5%
13549
472
3.5%
Wales
3802
295
7.8%
3851
295
7.7%
Scotland
2094
58
2.8%
2094
58
2.8%
GB
19310
825
4.3%
19494
825
4.2%
Table 6a (i): Number of animals and submissions tested in July 2024
Country
No.
animals
No of IFNg+
animals
% Positive
animals
No. samples
No of IFNg+
samples
% Positive
samples
England
82473
4142
5.0%
87993
4146
4.7%
Wales
40898
2897
7.1%
43152
2899
6.7%
Scotland
3145
83
2.6%
3211
83
2.6%
GB
126513
7122
5.6%
134356
7128
5.3%
Table 6b (i): Number of animals and submissions tested in 2024 Up to end of July
Country
No.
animals
No of IFNg+
animals
% Positive
animals
No. samples
No of IFNg+
samples
% Positive
samples
England
13445
449
3.3%
13479
449
3.3%
Wales
4499
143
3.2%
4568
143
3.1%
Scotland
411
5
1.2%
423
5
1.2%
GB
18355
597
3.3%
18470
597
3.2%
Table 6a (ii): Number of animals and submissions tested in July 2023
Table 6b (ii): Number of animals and submissions tested in 2023 Up to end of July
Country
No.
animals
No of IFNg+
animals
% Positive
animals
No. samples
No of IFNg+
samples
% Positive
samples
England
77494
3224
4.2%
81286
3224
4.0%
Wales
35200
1915
5.4%
37359
1915
5.1%
Scotland
4399
387
8.8%
7462
387
5.2%
GB
117075
5526
4.7%
126107
5526
4.4%

* Test type
Num
Submissions
Num Samples Num Positives
Private
% Positive
Dorset
PRV-SP
1
1
0
0
Shropshire
PRV-SP
1
4
0
0
Total
2
5
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 July 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 %
Dorset
PRV-SP
1
1
0
0
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
Shropshire
PRV-SP
1
4
0
0
Wiltshire
PRV-SP
1
1
0
0
Worcestershire
PRV-SE
1
1
0
0
Total
16
252
16
6.35 %

Country
County
Test Reason
Num
Submissions
Num Samples
Tested
Num Positive
Samples
% Positive
England
Cheshire
BOV-P
1
7
1
14.3%
England
1
7
1
14.3%
Wales
Carmarthenshire
BOV-IR-C
4
56
10
17.9%
BOV-IR-EX
1
3
3
100.0%
Ceredigion
BOV-IR-C
3
17
7
41.2%
BOV-IR-EX
1
2
0
0
North East Wales
BOV-IR-C
6
50
7
14.0%
BOV-OTHER
1
65
3
4.6%
Pembrokeshire
BOV-IR-C
15
124
33
26.6%
BOV-IR-EX
1
6
0
0
BOV-P
1
57
8
14.0%
Powys
BOV-IR-C
10
126
17
13.5%
South Wales
BOV-IR-C
3
13
3
23.1%
BOV-POSTM
1
14
4
28.6%
Wales
47
533
95
17.8%
All GB
48
540
96
17.8 %
Table 8a Number of Cattle Antibody Tests July 2024
Table 8b Number of Cattle Antibody Tests 2024
Country
County
Test Reason
Num Submissions Num Samples Tested Num Positive Samples % Positive
England
Cheshire
BOV-P
1
7
1
14.3%
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
9
1,428
60
4.2%
Wales
Carmarthenshire
BOV-IR-C
30
314
53
16.9%
BOV-IR-EX
6
21
9
42.9%
BOV-OTHER
1
7
0
0
BOV-P
1
57
0
0
Ceredigion
BOV-IR-C
16
78
17
21.8%
BOV-IR-EX
7
50
15
30.0%
North East Wales
BOV-IR-C
19
131
25
19.1%
BOV-IR-EX
4
13
2
15.4%
BOV-OTHER
3
110
9
8.2%
BOV-P
3
111
7
6.3%
North West Wales
BOV-IR-C
1
5
0
0
Pembrokeshire
BOV-IR-C
116
1,279
256
20.0%
BOV-IR-EX
19
96
32
33.3%
BOV-OTHER
3
120
4
3.3%
BOV-P
4
229
20
8.7%
Powys
BOV-IR-C
27
272
38
14.0%
BOV-IR-EX
3
20
1
5.0%
South Wales
BOV-IR-C
11
88
19
21.6%
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
75
19
25.3%
Wales
278
3,476
540
15.5%
All GB
287
4,904
600
12.2 %