Avian infectious bronchitis
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Avian infectious bronchitis (IB) is an acute and highly contagious respiratory disease of chickens. It is caused by avian infectious bronchitis virus, a coronavirus. The disease is characterized by respiratory signs including gasping, coughing, sneezing, tracheal rales, and nasal discharge. In young chickens, severe respiratory distress may occur. In layers, respiratory distress, nephritis, decrease in egg production, and loss of internal egg quality and egg shell quality are reported.
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