Neutralizing and precipitating antibodies against infectious bronchitis virus in chickens

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Abstract
Extract Infectious bronchitis is an acute, highly contagious disease of chickens. Characteristically the disease predominantly involves the respiratory system, but in Australia, Cumming (1969) Cumming, R. B. 1969. Studies on avian infectious bronchitis virus. 2. Incidence of the virus in broiler and layer flocks, by isolation and serological methods. Aust. vet. J., 45: 309–311. [Google Scholar] reported that certain strains of infectious bronchitis virus, designated “A” and “T” isolates, are cap-able of causing nephritis in addition to respiratory signs. Similar strains were later also identified in New Zealand (Pohl, 1968 Pohl, R. M. and Pohl, R. M. 1967. Infectious bronchitis in chickens. N.Z. vet. J., 15: 151 [Taylor & Francis Online] [Google Scholar] ) and other countries.