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Iranian Journal of Veterinary Medicine
BACKGROUND: Avian infectious bronchitis (IB), with avi-an infectious bronchitis virus (IBV) as the causing agent, is a ubiquitous endemic disease of the chicken with devastating effects on its industry. A viral membrane surface protein called S not only induces neutralizing antibodies but also plays an important role in virus binding and entry to host cells. Technically, S1 protein gene sequencing also helps greatly in IBV genotyping. OBJECTIVES: The aim of this study was to characterizefatcat:vzznqb3wqbcj3n4vbmkek6qbbm