Molecular characterization of recent Iranian infectious bronchitis virus isolates based on S2 protein gene

ABSTRACT

Background: avian infectious bronchitis [IB], with avian 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