Vaccination of young chickens with live vaccine against some new zealand isolates of infectious bronchitis virus

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Abstract
Extract The isolation of infectious bronchitis (IB) virus of chickens in New Zealand ( Pohl, 1967 Pohl, R. M. 1967. Infectious bronchitis in chickens. N.Z. vet. J., 15: 151–151. [Taylor & Francis Online] [Google Scholar] , 1968 Pohl, R. M. 1968. Uraemia (infectious nephritis) in chickens in New Zealand. N.Z. vet. J., 16: 188–188. [Taylor & Francis Online] [Google Scholar] ) has been followed by reports on the frequency of IB virus isolation at the Ruakura Animal Health Laboratory ( McCausland, 1972 McCausland, I. P. 1972. Diseases of the domestic fowl in northern New Zealand. N.Z. vet. J., 20: 160–166. [Taylor & Francis Online] [Google Scholar] ) and clinical symptoms and pathology of IB in New Zealand ( McCausland et al., 1972 McCausland, I. P. , Carter, M. E. and Hunter, R. 1972. Infectious bronchitis in New Zealand chickens. N.Z. vet. J., 20: 120–124. [Taylor & Francis Online] [Google Scholar] ). More recently a serological pilot survey ( Lohr, 1974 Lohr, J. E. 1974. Neutralizing and precipitating antibodies against infectious bronchitis virus in chickens. N.Z. vet. J., 22: 5–9. [Taylor & Francis Online] [Google Scholar] ) has given further indications of the extent of the disease in New Zealand.