# Council Directive of 26 June 1964 on animal health problems affecting intra-Community trade in bovine animals and swine (64/432/EEC), Division 2.2.5.3.2: Intradermal comparative test for the establishment and maintenance of officially tuberculosis-free herd status:

Extent: E+W+S+N.I.

(a) positive: a positive bovine reaction which is more than 4 mm greater than the avian reaction, or the presence of clinical signs;
(b) inconclusive: a positive or inconclusive bovine reaction which is from 1 to 4 mm greater than the avian reaction, and the absence of clinical signs;
(c) negative: a negative bovine reaction, or a positive or inconclusive bovine reaction but which is equal to or less than a positive or inconclusive avian reaction and the absence of clinical signs in both cases.
Animals inconclusive to the intradermal comparative test shall be subjected to another test after a minimum of 42 days. Animals, which are not negative to this second test, shall be deemed to be positive to the test.

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Source: https://www.legislation.gov.uk/eudr/1964/432/annex/B/division/2/division/2.2/division/2.2.5.3.2 (the official version)
Page: https://openlegislation.uk/eu-directive-1964-432/annex-B/division-2/division-2.2/division-2.2.5.3.2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.