Characterization of oral treponemes isolated from human periodontal pockets.
A total of 90 clinical strains of oral treponemes was isolated from subgingival plaque in patients with periodontal disease. They were characterized by biochemical means as well as cell enzyme, protein analysis using sodium dodecyl sulfate-polyacrylamide gel electrophoresis and DNA dot blot hybridization. Sixty strains were isolated on Medium 10 (M10), which was fundamentally serum-free. The remainder were isolated on serum-containing media. Isolates were divided into 6 groups according to their biochemical characteristics. Three of the 6 groups were asaccharolytic, and 2 of these 3 groups were Treponema denticola and "Treponema vincentii". The other 3 groups were saccharolytic and further divided into 9 subgroups. The analysis of cell enzyme, cell protein and dot blot hybridization with the DNA probe of Treponema socranskii indicated that all the saccharolytic groups were T. socranskii or closely related species. This study indicated that the newly characterized saccharolytic oral treponemes could be identified using M10 from the human periodontal pocket.
Koseki
T
T
Department of Periodontology, Faculty of Dentistry, Tokyo Medical and Dental University, Tokyo, Japan.
Ishikawa
I
I
Umeda
M
M
Benno
Y
Y
D001426:Bacterial Proteins / Q000032:analysis / Q000378:metabolism; D015373:Bacterial Typing Techniques; D050260:Carbohydrate Metabolism; D003470:Culture Media; D016895:Culture Media, Serum-Free; D015342:DNA Probes; D004269:DNA, Bacterial; D005285:Fermentation / Q000235:genetics / Q000502:physiology; D006019:Glycolysis / Q000502:physiology; D006801:Humans; D009693:Nucleic Acid Hybridization; D010514:Periodontal Pocket / Q000382:microbiology*; D014208:Treponema / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism
D001426:Bacterial Proteins; D003470:Culture Media; D016895:Culture Media, Serum-Free; D015342:DNA Probes; D004269:DNA, Bacterial