[The experimental study of para-rickettsial pneumonia in calves].
D000818:Animals; D002417:Cattle; D002418:Cattle Diseases; D005260:Female; D006801:Humans; D010298:Parity; D011014:Pneumonia / Q000662:veterinary*; D011022:Pneumonia, Rickettsial; D012282:Rickettsia Infections / Q000662:veterinary*
CATTLE/diseases; PNEUMONIA/veterinary; RICKETTSIAL DISEASES/veterinary