Abstract
Chicken astrovirus (CAstV) is associated with ‘white chick’ syndrome, which increases embryo mortality and reduces hatchability in chickens. In the present study, 1760 sera were collected from 21 provinces in China to detect antibodies directed against CAstV with an ELISA. The sera were from different varieties of chicken in 85 flocks and all the flocks produced positive reactions. The overall seroprevalence in the birds tested was 60.68%. The prevalence increased from 34.17% to 74.44% with the increase of age. The positivity rates in layer flocks, layer parent flocks, broiler flocks, broiler parent flocks, and domestic chicken flocks were 70.17%, 89.00%, 31.67%, 59.05%, and 45.79%, respectively. These data indicate that CAstV infections are very common in China. This is the first report of the seroprevalence of CAstV infections in China.
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