title: Viral respiratory infections of horses: pathogenesis.
mesh_terms: D000818:Animals; D006734:Horse Diseases / Q000209:etiology* / Q000473:pathology; D006736:Horses; D008168:Lung / Q000473:pathology; D011014:Pneumonia / Q000473:pathology; D012141:Respiratory Tract Infections / Q000209:etiology / Q000473:pathology / Q000662:veterinary*; D014777:Virus Diseases / Q000209:etiology / Q000473:pathology / Q000662:veterinary*