Abstract
Infectious bronchitis virus (IBV) causes severe diseases in poultry with significant economic consequences to the poultry industry in Iran. The aim of this study was the detection and identification of IBV by reverse transcription(RT)-PCR in Iran. Ten IB virus strains were detected by testing trachea, cecal tonsil, and kidney tissues collected from broiler and layer farms in Iran. In order to detect infectious bronchitis virus, an optimized RT-PCR was used. Primers targeting the conserved region of known IBV serotypes were used in the RT-PCR assay. Primers selectively detecting Massachusetts and 793/B type IB viruses were designed to amplify the S1 gene of the virus and used in the nested PCR test. Our findings indicate the circulation of at least three genotypes of IB viruses (Massachusetts, 793/B, and variant 2) among poultry flocks.
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