Official Statistics

Tuberculosis (TB) in Cattle: Pre-movement and Post-movement Testing in Great Britain, 2006 to September 2023

Updated 14 March 2024

Applies to England, Scotland and Wales

This notice contains statistics on statutory pre- and post- movement TB testing that is carried out to reduce the risk of spreading TB through movements of infected cattle. Unlike the majority of TB tests, the pre- and post-movement tests reported on in this notice were arranged and paid for by herd owners.

Key points July to September 2023

• Pre-movement tests in England led to the identification of 69 reactors, including 3 inconclusive reactors (IR) that became reactors at retest, out of 102,122 tests completed.
• Pre-movement testing in Wales led to the identification of 16 reactors, including 5 IRs that became reactors at retest, out of 38,442 tests completed.
• Post-movement testing in the Low Risk Area (LRA) of England identified 1 reactor, out of 14,408 tests completed.
• From August 2023, mandatory post-movement testing commenced in annual surveillance parts of the Edge area of England.
• There were 558 post-movement tests in Scotland of animals that had arrived from annual and six-monthly testing areas in England and Wales. These tests identified no reactors.
• Post-movement testing in the low TB area of Wales led to identification of no reactors, out of 2,540 tests completed.

1. Introduction to Pre- and Post-Movement TB Testing

The different TB movement testing regimes in England, Scotland and Wales reflect regional variations in disease incidence, including the Officially TB Free status of Scotland.

The movement of cattle with undetected TB infection is believed to be one of the most common ways in which this disease spreads to new areas. In particular, movements of cattle from high bovine TB incidence areas of GB pose a substantial risk of introducing the infection to the lower incidence areas of England and Wales and to Scotland, which has been officially free of TB since September 2009. Such movements are estimated to account for between a quarter and a fifth of all new TB herd breakdowns in the LRA each year and 1 in 6 in the Edge Area. Source: Bovine tuberculosis in England in 2021: Epidemiological analysis of the 2021 data and historical trends. Figure 3.2.10 Summary of the weighted source of infection attributed for all TB incidents (both OTF-W and OTF-S) with a provisional or final pathway that started in 2021.

2. England Pre-movement TB Testing

Compulsory pre-movement testing of cattle was introduced in England in March 2006, initially for animals over 15 months of age. The minimum qualifying age was lowered to 42 days the following year. Legislative changes implemented since 2012 have progressively led to the abolition of the majority of pre-movement testing exemptions that were permitted under the original TB legislation. Nowadays, all cattle aged 42 days and over moving out of annually (or more-frequently) tested herds must have a skin test with negative results within 60 days before movement, with few exceptions such as cattle moving directly to slaughter, to an approved finishing unit (AFU) or to a slaughter market.

Figure 2.1 Reactors slaughtered by quarter in England following disclosure by pre-movement tests, since the rollout of the policy in March 2006

View the data for this chart

Annual numbers of pre-movement tests (PRMT) in England increased by 27% between 2012 and 2016. There was an expansion of the areas under annual routine testing and the division of England on 1 January 2013 into a Low Risk Area (on background four-yearly herd testing) and High Risk (HRA) and Edge Areas (where cattle herds were placed on annual or six-monthly surveillance testing). Annual numbers of pre-movement tests in England have been generally level since 2017, but since 2020, the number of reactors identified by pre-movement tests in England has seen a substantial decrease.

The second quarter of 2023 saw a spike in reactors identified by pre-movement tests in England, with 164 identified (including 6 inconclusive reactors that became reactors at retest). 109 of these originated from a single herd in Wiltshire.

Table 2.1 England pre-movement TB tests quarterly

Measure	Oct-Dec 2022	Jan-Mar 2023	Apr-Jun 2023	Jul-Sep 2023
All movements	1,196,981	1,153,071	1,196,003	1,059,121
Pre-movement animal tests	95,009	117,159	114,504	102,122
Pre-movement test reactors	33	30	158	66
Total reactors: PRMT and IR to R	34	32	164	69
Herds with reactors	14	20	24	24

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Table 2.2 England pre-movement TB tests annually

Measure	2019	2020	2021	2022
All movements	4,644,378	4,688,409	4,605,426	4,554,526
Pre-movement animal tests	475,724	486,191	483,811	415,992
Pre-movement test reactors	447	547	298	161
Total reactors: PRMT and IR to R	481	578	319	179
Herds with reactors	215	272	165	94

3. Wales Pre-movement TB Testing

The policy was introduced to Wales in May 2006, with some changes to exemptions since 2010. All cattle aged 42 days and over moving out of an annually or more-frequently tested herd must have tested negative to a TB test within 60 days before movement - unless the herd or type of movement is exempt.

Figure 3.1 Reactors slaughtered by quarter in Wales following disclosure by pre-movement tests, since the rollout of the policy in March 2006

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From 1 October 2017 farmers in the Low TB Area of Wales are not required to pre-movement test (PRMT) cattle (some exceptions apply). In the 12 months before the policy change farmers in the Low TB area paid for 50,304 PRMT, around 45,000 of these tests in Wales would now not be required. This represents 25% of all PRMT in Wales during the 12 month period before the policy change. The underlying statistical dataset from 2006 (Table B: Wales Pre-movement tests) is available to download.

From 2013 to 2019 the number of herds in Wales that had reactors disclosed by pre-movement testing remained fairly consistent as an annual total, despite the change in testing policy. Between 2020 and 2022 there was a reduction in herds with reactors and total reactors slaughtered. Figure 3.1 shows the seasonal fluctuation in reactors slaughtered with peaks generally in the July to September quarter. This is most likely due the PRMT undertaken prior to the October moves and sales when animals have been grazing outdoors during spring and summer.

Table 3.1 Wales pre-movement TB tests quarterly

Measure	Oct-Dec 2022	Jan-Mar 2023	Apr-Jun 2023	Jul-Sep 2023
All movements	247,981	220,490	234,087	199,981
Pre-movement animal tests	36,392	43,347	41,630	38,442
Pre-movement test reactors	22	7	24	11
Total reactors: PRMT and IR to R	28	9	25	16
Herds with reactors	12	7	14	10

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Table 3.2 Wales pre-movement TB tests annually

Measure	2019	2020	2021	2022
All movements	880,611	887,113	887,297	902,709
Pre-movement animal tests	129,855	136,149	142,500	156,272
Pre-movement test reactors	106	80	90	69
Total reactors: PRMT and IR to R	128	83	97	79
Herds with reactors	54	42	46	40

4. Scotland post-movement TB Testing

Introduced in 2005, all cattle 42 days old and over in a yearly testing area must be pre-movement tested before they enter any Scottish herd. Having entered a Scottish herd these animals must be post-movement tested within 60-120 days although exemptions apply such as if a routine herd test is scheduled.

The figures shown here relate solely to Scotland’s post-movement testing rules. A small number of compliance tests are carried out in Scotland on animals with movements not compliant with England and Wales testing rules before they were moved to Scotland. These tests are not included in the data.

The number of reactors disclosed by these tests is consistently very low.

The number of post-movement tests carried out each quarter in Scotland is usually in the 200 to 600 range.

In September 2015 there was a change to the way that tests on animals arriving from Northern Ireland were recorded so that they are now captured on a separate code. Data from earlier years is not directly comparable. The underlying statistical dataset from 2006 (Table C: Scotland post-movement tests) is available to download.

The first quarter of 2023 was the first to feature a POMT reactor in Scotland since 2020. The animal in question was detected in Ayrshire having moved from a holding in the Edge area of England.

Table 4.1 Scotland post-movement tests quarterly

Measure	Oct-Dec 2022	Jan-Mar 2023	Apr-Jun 2023	Jul-Sep 2023
Post-movement tests (POMT)	224	612	303	558
Post-movement test reactors	0	1	0	0
Total reactors: POMT and IR to R	0	1	0	0
Herds with reactors	0	1	0	0

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Table 4.2 Scotland post-movement tests annually

Measure	2019	2020	2021	2022
Post-movement tests (POMT)	1,859	1,544	2,602	1,619
Post-movement test reactors	0	8	0	0
Total reactors: POMT and IR to R	0	8	0	0
Herds with reactors	0	1	0	0

5. England post-movement TB Testing in the Low Risk Area and annual surveillance part of Edge Area

Introduced on 6 April 2016, post-movement testing is required between 60 and 120 days after animals arrive to the low risk area (LRA) from other parts of England or from Wales. Therefore, the movements may have been undertaken in the previous period e.g. reactors found in Q1 could correspond to testing of animals moved during Q4.

From August 2023, animals moved in to 12-monthly testing parts of the Edge Area from higher-risk areas in England, and from Wales are also subject to mandatory post-movement testing. Between August and September 2023 there were 150 post-movement tests in annual surveillance parts of the Edge, identifying no reactors.

Figure 5.1 Reactors slaughtered by quarter in Low Risk Area of England following disclosure by post-movement tests, since the rollout of the policy in April 2016

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The quarterly testing effort has remained relatively consistent since 2017, with the number of reactors disclosed ranging from 0 to 40. The underlying statistical dataset (Table D: England post-movement tests) is available to download.

Table 5.1 Post-movement testing in Low Risk Area of England, quarterly

Measure	Oct-Dec 2022	Jan-Mar 2023	Apr-Jun 2023	Jul-Sep 2023
Cattle movements on to the LRA from Wales and higher risk areas of England	30,359	33,237	30,156	26,828
Post-movement tests (POMT)	11,086	15,716	16,375	14,408
POMT reactors	0	1	3	1
Total reactors: POMT and IR to R	0	1	3	1
Herds with reactors	0	1	3	1

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Table 5.2 Post-movement testing in Low Risk Area of England, annually

Measure	2019	2020	2021	2022
Cattle movements on to the LRA from Wales and higher risk areas of England	104,521	112,921	120,129	115,294
Post-movement tests (POMT)	54,143	49,242	53,567	55,818
POMT reactors	57	22	4	15
Total reactors: POMT and IR to R	63	23	7	18
Herds with reactors	6	18	3	11

6. Wales post-movement TB Testing in the Low TB Area

From 1 October 2017 farmers in the Low TB Area of Wales need to Post-Movement Test cattle which move from a herd in an Intermediate or High TB area in Wales; or the Edge or High Risk Area of England. In common with the England LRA testing policy, a post movement test is not needed if the animal is tested as part of an annual surveillance test within the 60 to 120 day Post-Movement Test window. Therefore the movements may have been undertaken in the previous period e.g. reactors found in Q1 could correspond to testing of animals moved during Q4 the previous year (or earlier if tested when non-compliance was found).

In November 2021 the boundaries of the Low TB and Intermediate North TB areas in Wales were realigned on epidemiological advice. Three spatial units that were part of the Low TB area will temporarily be part of the Intermediate North area. As a result, post-movement testing figures from Q4 2021 onwards are not directly comparable with older figures. See frequently asked questions

The underlying statistical dataset (Table E: Wales post-movement tests) is available to download.

Table 6.1 Post-movement testing in Low TB Area of Wales, quarterly

Measure	Oct-Dec 2022	Jan-Mar 2023	Apr-Jun 2023	Jul-Sep 2023
Cattle movements on to the Low TB Area from higher risk areas of England and Wales	3,662	4,104	4,723	3,287
Post-movement tests (POMT)	1,578	1,505	3,077	2,540
POMT reactors	0	0	0	0
Total reactors: POMT and IR to R	0	0	0	0
Herds with reactors	0	0	0	0

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Table 6.2 Post-movement testing in Low TB Area of Wales, annually

Measure	2019	2020	2021	2022
Cattle movements on to the Low TB Area from higher risk areas of England and Wales	16,091	19,346	18,545	16,255
Post-movement tests (POMT)	10,786	10,695	11,490	10,684
POMT reactors	0	2	3	6
Total reactors: POMT and IR to R	0	2	3	6
Herds with reactors	0	1	2	3

7. What you need to know about this release

7.1 Contact details

Email address: TBStatistics@Defra.gov.uk

Public enquiries:

Defra TB Statistics
Mallard House, Kings Pool
Peasholme Green
York
YO1 7PX

Media Enquiries: 0208 225 7318 (Press Office)

7.2 Official statistics status

This is an Official Statistics publication. Our statistical practice is regulated by the Office for Statistics Regulation (OSR). OSR sets the standards of trustworthiness, quality and value in the Code of Practice for Official Statistics that all producers of official statistics should adhere to. You can read about how Official Statistics in Defra comply with these standards on the Defra Statistics website. You are welcome to contact us directly with any comments about how we meet these standards using the contact details above. Alternatively, you can contact OSR by emailing regulation@statistics.gov.uk or via the OSR website.

8. About these statistics

8.1 Data source and future revisions

These statistics are obtained from three sources:

• Animal and Plant Health Agency (APHA) work management IT support system (Sam), used for the administration of TB testing in GB,
• APHA Customer Service Centre,
• The Cattle Tracing System (CTS).

These statistics may be subject to small revisions until all test results are available. Data can be subject to review back to 2021.

8.2 Feedback on these statistics

We encourage our users to engage with us so we can improve our National and Official Statistics and identify gaps in the statistics that we produce. This document has been designed to meet the accessibility requirements outlined in WCAG 2.1. Should you have any comments on this statistical release and how to improve it to meet your needs please contact us by email to tbstatistics@defra.gov.uk

8.3 Future publications

The publication calendar is available to view at: Release Calendar.

9. Glossary

Term	Definition
AFU	Approved Finishing Units. AFUs provide a route for rearing, fattening or finishing cattle from TB restricted and un-restricted farms. AFUs must be approved and licensed by APHA. There are two types: AFUs with grazing (only in certain areas of the High Risk Area of England only) and AFUs without grazing.
APHA	Animal and Plant Health Agency.
CTS	Cattle Tracing System.
EFU	Exempt Finishing Units. EFUs provide a route for beef producers to finish cattle without the need for a pre-movement test. EFUs must be approved and licensed by APHA. These units must meet strict conditions to reduce the potential risk of disease spread from the premises. There are two types: EFUs with grazing and EFUs without grazing. From 1 July 2017 no new units can be approved in Wales. From 1 January 2018 no EFUs exist in Wales.
IR	Inconclusive reactor. An animal showing a positive reaction to tuberculin that was not strong enough for it to be deemed a reactor. These animals may be tested again after 60 days or can be slaughtered voluntarily.
LFU	A licensed finishing unit (LFU) is a type of TB unit approved by APHA in the LRA and Low TB Area of Wales. Cattle finished in LFUs will remain under movement restrictions at all times and can only be moved from those units directly to slaughter.
LRA	Low risk area of England.
POMT	General term for all types of post movement tests.
POSTMOVOV	Post-Movement Test Code for England and Wales.
POSTMTS	Post-movement test (Scotland) This is a post-movement test, paid for by the keeper, to be carried out 60-120 days after arrival to Scotland from England or Wales (exceptions apply). The code was amended in September 2015 to exclude animals arriving from Northern Ireland.
PRMT	Pre-movement test (England, Wales) a pre-movement test carried out 60 days or less prior to movement of an animal(s) from an annually or more frequently tested herd.
PRMTS	A test paid for by the keeper to be carried out on cattle that have arrived into Scotland that should have had a pre-movement test before departure. Data is not included in these statistics.
R	Reactor. An animal which was compulsorily slaughtered because it responded to the tuberculin skin test in a way that was consistent with it being infected with Mycobacterium bovis.