TB-free farms offered option to pay for extra private tests

An additional bovine tuberculosis (bTB) private testing scheme has been introduced to provide peace of mind to unrestricted, officially TB-free farms in England.

The Animal and Plant Health Agency (APHA) has targeted the service at farms seeking “additional assurances” above statutory testing.

This is the latest initiative to deliver TB freedom across more than half the country by 2019 and starts at a cost of £16.25 (for 10 or more tests).

The scheme, started on Wednesday (6 April), can now be run through private veterinarians following APHA approval and offers two types of interferon-gamma (IFNG) blood tests.

  • High specificity test: For officially TB free-herd cattle only – for movements, sales, inconclusive reactors and additional surveillance following negative routine skin testing.
  • High sensitivity test: For cattle in TB-restricted herds that do not qualify for a government-funded IFNG test. Used for infected herds coming to end of restriction testing.

Testing costs


Single test

Five or more tests

10 or more tests

High specificity test




High sensitivity test




Private tests will be carried out on Thursdays only, with APHA advising samples “must therefore be taken on a Wednesday and arrive at the laboratory by either 4pm on the day of sampling or by 9am on Thursday”.

Farmers are warned that positive reactors will be compulsory slaughtered with statutory compensation and official herd restrictions.

Low-risk animals may be rested at government discretion and expense.

Examples of cattle eligible for IFNG testing

Not eligible for IFNG testing

  • Supplementary pre- or post-movement testing of pedigree animals that are not subject to, or have passed, a compulsory skin test.
  • More sensitive TB screening of animals joining high-value herds, including pedigree bulls entering semen-collection centres.
  • As a marketing tool to add value to herd/animals intended for sale
  • Ad hoc testing following a negative routine or tracing skin test.
  • Rapid retesting of inconclusive skin test reactors where no government-funded IFNG blood test is planned.
  • Cattle from herds under TB restriction and undergoing government IFNG testing.
  • Skin test-positive (reactor) and other cattle awaiting slaughter for TB control purposes.
  • Animals in Scotland, Wales or Northern Ireland at the time of testing.
  • Herds under restrictions for overdue tuberculin skin tests.
  • Cattle under six months of age.