29. Januar 2021
Infectious bronchitis (IB) is one of the most important respiratory disease in chickens. The destruction of the mucosa after infection with infectious bronchitis virus (IBV) allows the invasion of secondary pathogens, exacerbating the disease. The causing agent is a member of the species avian Coronavirus, which belongs to the genus Gammacoronavirus and family of Coronaviridae. IB was first observed in 1930 in the USA (Schalk and Hawn 1931) (Fig. 1).