An infection is the invasion of an organism's body tissues by pathogens, their multiplication, and the reaction of host tissues to the infectious agents and the toxins they produce. An infectious disease, also known as a transmissible disease or communicable disease, is an illness resulting from an infection.. Infections can be caused by a wide range of pathogens, most prominently …

Avian infectious bronchitis (IB) is an acute and highly contagious respiratory disease of chickens.The disease is caused by avian infectious bronchitis virus (IBV), a coronavirus (Coronaviridae, Orthocoronavirinae, genus Gammacoronavirus, subgenus Igacovirus), and characterized by respiratory signs including gasping, coughing, sneezing, tracheal rales, and …