# Council Directive 92/66/EEC of 14 July 1992 introducing Community measures for the control of Newcastle disease, Division (a): Samples

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

Blood samples should be taken from all birds if the flock size is less than 20 and from 20 birds from larger flocks (this will give a 99 % probability of detecting at least one positive serum if 25 % or more of the flock is positive, regardless of flock size). The blood should be allowed to clot and serum removed for testing.

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Source: https://www.legislation.gov.uk/eudr/1992/66/annex/III/chapter/4/division/2/division/a (the official version)
Page: https://openlegislation.uk/eu-directive-1992-66/annex-III/chapter-4/division-2/division-a
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.