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Similarity of avian paramyxovirus serotype 1 isolates of low virulence for chickens obtained from contaminated poultry vaccines and from poultry flocks
Author(s) -
Jrgensen P. H.,
Jensen Handberg K.,
Ahrens P.,
Manvell R. J.,
Frost K. M.,
Alexander D. J.
Publication year - 2000
Publication title -
veterinary record
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.261
H-Index - 99
eISSN - 2042-7670
pISSN - 0042-4900
DOI - 10.1136/vr.146.23.665
Subject(s) - flock , serotype , virulence , poultry farming , virology , biology , veterinary medicine , newcastle disease , influenza a virus subtype h5n1 , virus , medicine , biochemistry , gene
At present Denmark has the status of a ‘non‐vaccinating’ country for Newcastle disease and its poultry population should therefore be free of antibodies to avian paramyxovirus 1 (APMV‐1). Three live avian vaccines against infectious bronchitis, avian encephalomyelitis, and chick anaemia which had been found to be contaminated with APMV‐1 viruses of low virulence for chickens were examined. The vaccines were produced by the same company and the affected batches had been used in Denmark in 1996/97.