Definitions.

CFR · 2024-01-01 · US · Title 9

Except where the context otherwise requires, for the purposes of this subpart the following terms shall be construed, respectively, to mean: (i) H5/H7 LPAI virus has been isolated and identified as such from poultry; or (ii) Viral antigen or viral RNA specific to the H5 or H7 subtype of AI virus has been detected in poultry; or (iii) Antibodies to the H5 or H7 subtype of the AI virus that are not a consequence of vaccination have been detected in poultry. If vaccine is used, methods should be used to distinguish vaccinated birds from birds that are both vaccinated and infected. In the case of isolated serological positive results, H5/H7 LPAI infection may be ruled out on the basis of a thorough epidemiological investigation that does not demonstrate further evidence of H5/H7 LPAI infection, as determined by the Cooperating State Agency, the Official State Agency, and APHIS. (2) The official determination that H5/H7 LPAI virus has been isolated and identified, viral antigen or viral RNA specific to the H5 or H7 subtype of AI virus has been detected, or antibodies to the H5 or H7 subtype of AI virus have been detected may only be made by the National Veterinary Services Laboratories.

official document · source cfr-2024 · id 9:§ 146.1