Isolation and Classification of Avian Enteric Cytopathogenic Agents

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Abstract
Forty-five cytopathogenic isolates were classified by serum-neutralization tests into 15 antigenic groupings. One group was shown to be antigenically identical to the CELO virus. The high frequency with which the agents were isolated suggested that they are extremely widespread in the field. Percentage of isolations were correlated with the age of the birds, not with the season in which the samples were taken.

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