The Presence of Avian Adenoviruses and Adeno-Associated Viruses in Healthy Chickens

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Abstract
Avian adenoviruses were isolated from 56 of 106 fecal and rectal tissue samples taken from apparently healthy young chickens on 4 farms. Only 1 isolation was made from the 37 samples from 3 and 4 wk old chicks; the isolation frequency was 64-100% in groups .gtoreq. 5 wk old. The 56 adenovirus isolates were classified into 6 serotypes. Viruses of 3 or 4 types were found on each farm. Avian adeno-associated virus CF [complement fixing] antigens were found, using chicken embryos coinfected with an adenovirus helper, in 2 of the 38 adenovirus isolates studied.