Coexistence of infectious bronchitis and infectious laryngotracheitis.
D000818:Animals; D001991:Bronchitis / Q000276:immunology / Q000662:veterinary*; D006566:Herpesviridae Infections / Q000276:immunology / Q000662:veterinary*; D007109:Immunity; D007827:Laryngitis / Q000662:veterinary; D011201:Poultry Diseases / Q000276:immunology*