Epidemiological and pathological studies of subgroup J avian leukosis virus infections in Chinese local "yellow" chickens.

Abstract

Epidemiological, pathological and molecular studies indicate that subgroup J avian leukosis virus (ALV-J) infections are widely spread in "yellow chickens" of local breeds in China. ALV-J induced tumour mortality and the serological conversion rates to ALV-J were very high in some breeder flocks. Typical myelocytomatosis was demonstrated not only in livers… (More)

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