title: In vitro cultivation and partial characterization of Lawsonia intracellularis from a Japanese field case of porcine proliferative enteropathy.
abstract: Lawsonia intracellularis isolated from a Japanese field case of porcine proliferative enteropathy (PPE) was cultivated and partially characterized. The bacterial cells isolated from the intestinal mucosa of a pig suffering from the acute form of PPE were used to inoculate rat small intestine cells (IEC-18) and human epithelial cells (HEp-2). Infected foci, which were stained with L. intracellularis-specific rabbit antiserum, were observed in the cell culture at 5 days post inoculation. The DNA sequence of several genes in the Japanese isolate had high similarity with those of the L. intracellularis type strain, suggesting the genetically close relationship of the two strains. This is the first report describing the cultivation and partial characterization of L. intracellularis originated in Japan.
authors.affiliation: Nippon Institute for Biological Science, Tokyo, Japan.
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Koyama
authors.forename: Takuya
authors.initials: T
authors.lastname: Hirai
authors.forename: Shinya
authors.initials: S
authors.lastname: Nagai
mesh_terms: D000818:Animals; D002460:Cell Line; D004269:DNA, Bacterial; D045824:Desulfovibrionaceae Infections / Q000453:epidemiology / Q000382:microbiology / Q000662:veterinary*; D004751:Enteritis / Q000453:epidemiology / Q000382:microbiology / Q000662:veterinary*; D007082:Ileum / Q000382:microbiology / Q000473:pathology; D007564:Japan / Q000453:epidemiology; D020639:Lawsonia Bacteria / Q000302:isolation & purification*; D008969:Molecular Sequence Data; D013552:Swine / Q000382:microbiology*; D013553:Swine Diseases / Q000453:epidemiology / Q000382:microbiology*
chemical_list: D004269:DNA, Bacterial