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An overview of infectious bronchitis virus in chickens

Published online by Cambridge University Press:  15 May 2014

F. AWAD
Affiliation:
University of Liverpool, Institute of Infection & Global Health, School of Veterinary Science, Leahurst Campus, Neston, South Wirral CH64 7TE, UK University of Omar Al-Mukhtar, Faculty of Veterinary Medicine, Al-Bayda, Libya
R. CHHABRA
Affiliation:
University of Liverpool, Institute of Infection & Global Health, School of Veterinary Science, Leahurst Campus, Neston, South Wirral CH64 7TE, UK College Central Laboratory, LLR University of Veterinary & Animal Sciences, Hisar-125001 India
M. BAYLIS
Affiliation:
University of Liverpool, Institute of Infection & Global Health, School of Veterinary Science, Leahurst Campus, Neston, South Wirral CH64 7TE, UK
K. GANAPATHY*
Affiliation:
University of Liverpool, Institute of Infection & Global Health, School of Veterinary Science, Leahurst Campus, Neston, South Wirral CH64 7TE, UK
*
Corresponding author: gana@liv.ac.uk
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Abstract

Infectious bronchitis virus (IBV) is one of the foremost causes of economic loss within the poultry industry. IBV is a commonly occurring, economically significant pathogen of commercial chicken. Economic consequences to the poultry industry comprise mortality, growth retardation and high condemnation rates in meat-type birds. In addition, decreased egg production, reduced internal and external egg quality, and reduced hatchability have been documented in layers and breeders affecting the performance of both meat-type and egg-laying birds. Apart from this some nephro-pathogenic strains cause kidney damage. Secondary pathogens can complicate the disease resulting in increased morbidity and mortality. Being a single stranded RNA virus, IBV has an enormous capacity to change both by spontaneous mutation and by genetic recombination resulting into the emergence of new variants. Since the first isolation of virus in 1937, it has been found almost all over the world. In addition, most countries are now known to have their own indigenous IBV variants. Despite the use of currently available live and inactivated vaccines, one of the most important difficulties to control IB is related to emergence of variant strains. The following paper reviews the current status of research into IBV.

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Type
Review Article
Copyright
Copyright © World's Poultry Science Association 2014 

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