Abstract
A monoclonal antibody (MAb)-based indirect immunoperoxidase (IP) procedure was applied to detect infectious bronchitis virus (IBV) antigen in frozen tissue sections. With this procedure, IBV antigen could be detected in chorioallantoic membranes (CAMs) within 15 hr postinoculation and in the respiratory tissues of chickens within 96 hr postinoculation. Endogenous peroxidases in chicken tissues were removed by treatment with periodic acid. The IP technique was highly sensitive, convenient, and economical. It allowed simultaneous evaluation of antigen-bearing cells and the general tissue morphology. The IP-stained slides also provided a permanent record.
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