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Title: Infectious Bronchitis
Contributor(s): Roberts, Julie R  (editor); Chousalkar, Kapil (author)
Publication Date: 2017
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Abstract: Avian infectious bronchitis (IB) is common in all parts of the world and is acute and highly infectious (Jackwood and de Wit, 2013). The infectious bronchitis virus (IBV) belongs to the family Coronaviridae, which consists of RNA-enveloped pleomorphic viruses that possess club-shaped surface projections that give the appearance of a "corona" or fringe (Almeida et al., 1968). The complete virus contains four polypeptides: the membrane protein, the envelope protein, the nucleocapsid protein, and large spike glycoprotein (S) (McMartin, 1993). The S protein is cleaved posttranslationally into S1 and S2 subunits (Jackwood et al., 2001). The section of the S gene that codes for the S1 subunit protein is the site of the majority of the variation between strains (Cavanagh et al., 1992; Adzhar et al., 1996). Only small changes in amino acid sequences are needed to produce a different serotype, which results in a high-evolution rate for IBV. The numerous antigenically diverse strains, almost as many serotypes, and the rapid evolution of yet more variant strains complicate the understanding of this disease (Ignjatovic et al., 2002).
Publication Type: Book Chapter
Source of Publication: Egg Innovations and Strategies for Improvements, p. 561-570
Publisher: Academic Press
Place of Publication: Oxford, United Kingdom
ISBN: 9780128008799
Field of Research (FOR): 070203 Animal Management
Socio-Economic Outcome Codes: 830501 Eggs
HERDC Category Description: B1 Chapter in a Scholarly Book
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Appears in Collections:Book Chapter
School of Environmental and Rural Science

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