title: Problems on the etiological importance of Pasteurella, Mycoplasma and parainfluenza-3-virus in enzootic pneumonia of calves.
mesh_terms: D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000209:etiology / Q000382:microbiology*; D008168:Lung / Q000382:microbiology; D009174:Mycoplasma / Q000472:pathogenicity*; D009175:Mycoplasma Infections / Q000382:microbiology; D018184:Paramyxoviridae Infections / Q000382:microbiology; D010325:Pasteurella / Q000472:pathogenicity*; D010326:Pasteurella Infections / Q000382:microbiology; D011014:Pneumonia / Q000209:etiology / Q000382:microbiology / Q000662:veterinary*; D018108:Respirovirus / Q000472:pathogenicity*