title: The epidemiology of disease of multiple aetiology: the avian respiratory disease complex.
mesh_terms: D000818:Animals; D001991:Bronchitis / Q000382:microbiology / Q000662:veterinary; D002645:Chickens; D007827:Laryngitis / Q000382:microbiology / Q000662:veterinary; D009175:Mycoplasma Infections / Q000382:microbiology / Q000662:veterinary*; D009521:Newcastle Disease / Q000209:etiology / Q000382:microbiology; D011201:Poultry Diseases / Q000382:microbiology; D012328:RNA Viruses; D012141:Respiratory Tract Infections / Q000662:veterinary*; D014136:Tracheitis / Q000382:microbiology / Q000662:veterinary