Summary
Fifteen british field strains of IBV were compared using cross serum neutralization tests in embryonated eggs with seven standard reference strains of IBV. While the British field strains were considered to form a relatively homogeneous group considerable antigenic variation did occur. It was considered that it was not feasible at this time to describe accurately a serotype classification for IBV, similar to that described for other virus groups.
Keywords: Infectious Disease, Reference Strain, Bronchitis, Field Strain, Homogeneous Group
References
- 1.Allan W. H., Herbert C. N. The precision of virus end-point determinations. Arch. ges. Virusforsch. 1968;25:330–336. doi: 10.1007/BF01556561. [DOI] [PubMed] [Google Scholar]
- 2.Almeida J. D., Berry D. M., Cunningham C. H., Hamre D., Hofstad M. S., Malucci L., McIntosh K., Tyrell D. A. J. Coronaviruses. Nature (Lond.) 1968;220:650. [Google Scholar]
- 3.Asplin F. D. Identification of infectious bronchitis of chickens in England. Vet. Rec. 1948;60:485–486. [PubMed] [Google Scholar]
- 4.Beaudette F. R., Hudson C. B. Cultivation of the virus of infectious bronchitis. J. Amer. vet. med. Ass. 1937;90:51–60. [Google Scholar]
- 5.Beery D. M., Stokes K. J. Antigenic variations in isolates of infectious bronchitis virus. Vet. Rec. 1968;82:157–160. [Google Scholar]
- 6.Box P. G., Barnes J. M. Infectious bronchitis serum neutralization tests. Vet. Rec. 1967;80:554–555. [Google Scholar]
- 7.von Bülow V. Infectious bronchitis of chickens. IV. Characterization of a new field strain of IB virus (IBV-10) Zbl. Vet.-Med. 1967;14B:151–162. [PubMed] [Google Scholar]
- 8.von Bülow V. Differentiation of field strains of avian infectious bronchitis virus. Zbl. Vet.-Med. 1969;16B:414–427. [PubMed] [Google Scholar]
- 9.Fritzsche K., Stumpel M., Toucas L., Billon I. Comparative studies on the pathogenicity, histopathological effects and immunising ability of two attenuated strains of avian infectious bronchitis virus. Zbl. Vet.-Med. 1969;16B:193–212. [PubMed] [Google Scholar]
- 10.Hofstad M. S. Antigenic differences among isolates of avian infectious bronchitis virus. Amer. J. vet. Res. 1958;19:740–743. [PubMed] [Google Scholar]
- 11.Hofstad M. S. Antigenic and immunological studies on several isolates of avian infectious bronchitis virus. Avian Dis. 1961;5:102–107. [Google Scholar]
- 12.Jungherr, E. L., T. W.Chomiak, and R. E.Luginbuhl: Immunologic differences in strains of infectious bronchitis virus. Proc. 60th. Ann. Mtg. U.S. Liv. San. Ass. 203–209 (1956).
- 13.Purchase H. G., Cunningham C. H., Burmester B. R. Identification and epizootiology of infectious bronchitis in a closed flock. Avian Dis. 1966;10:111–121. [PubMed] [Google Scholar]
- 14.Reed L. J., Meunch H. A. A simple method of estimating 50% end points. Amer. J. Hyg. 1938;27:493–497. [Google Scholar]
- 15.Wenner H. A., Archetti I., Dubes C. R. Antigenic variations among type 1 poliovirus. A study of 16 wild type strains and 5 variants. Amer. J. Hyg. 1959;70:66–90. doi: 10.1093/oxfordjournals.aje.a120065. [DOI] [PubMed] [Google Scholar]
- 16.Winterfield R. W., Cumming R. B., Hitcher S. B. Serological study of Australian chickens affected with a uraemia disease syndrome. Avian Dis. 1964;8:234–244. [Google Scholar]
- 17.Winterfield R. W., Hitchner S. B. Etiology of an infectious nephritis-nephrosis syndrome of chickens. Amer. J. vet. Res. 1962;23:1273–1279. [PubMed] [Google Scholar]
- 18.Winterfield R. W., Hitchner S. B., Appleton G. S. Immunological characteristics of a variant of infectious bronchitis virus isolated from chickens. Avian Dis. 1964;8:40–47. [Google Scholar]
- 19.Zanella A., Guallini L., Morini M. T. Characteristics of strains of avian infectious bronchitis virus causing nephrosis. Atti. Soc. ital. Sci. vet. 1968;21:895–899. [Google Scholar]