Avian Infectious Bronchitis is a '''highly contagious''' viral disease primarily of the '''[[Respiratory System | respiratory system]]''' of birds, caused by a '''[[Coronaviridae | coronavirus]]'''. | Avian Infectious Bronchitis is a '''highly contagious''' viral disease primarily of the '''[[Respiratory System | respiratory system]]''' of birds, caused by a '''[[Coronaviridae | coronavirus]]'''. |