author(s)
Marskole Priyanka, Yamini Verma, Madhu Swamy, Amita Dubey and Archana Bharti

abstract
Infectious bronchitis (IB) is an extremely contagious viral disease of poultry caused by Corona virus. The disease was first described in 1930 in USA. The disease is prevalent globally with the incidence of infection approaching 100% in most locations. The virus replicates not only in the epithelium of respiratory tract, but also replicates in many other tissues causing respiratory, renal and urogenital disorders. Clinical signs of disease vary based on the age of birds, pathogenecity of the virus strain and existing level of immunity. Economic consequences to the poultry industry comprise growth retardation, decreased egg production, reduced internal and external egg quality, reduced hatchability and infertility. Since the disease continues to emerge with diversity it is much difficult to control infection as no specific treatment is available. Therefore, early diagnosis and concentrated efforts is necessary to reduce the impact of disease. This review gives insight on infectious bronchitis virus effect on poultry.