title: Spirochetal organisms from pigs. I. Isolation, cultivation and maintenance.
mesh_terms: D000818:Animals; D001431:Bacteriological Techniques; D013142:Spirochaeta / Q000302:isolation & purification*; D013145:Spirochaetales Infections / Q000382:microbiology / Q000662:veterinary*; D013552:Swine; D013553:Swine Diseases / Q000382:microbiology*