PMID: 8596667Oct 1, 1995Paper

Population genetic analysis of oral treponemes by multilocus enzyme electrophoresis

Oral Microbiology and Immunology
U R DahleD A Caugant

Abstract

Seventeen treponemes recently isolated from necrotic pulps, periodontal and periapical infections and 17 previously well characterized oral treponemal strains were analyzed by multilocus enzyme electrophoresis. Ten genetic loci were characterized on the basis of the electrophoretic mobilities of their enzymatic products. All loci were polymorphic. The average number of alleles per locus was 7.8. The genetic diversity among the electrophoretic types at each locus ranged from 0.624 to 0.836 with a mean genetic diversity per locus of 0.751. The 34 strains represented 34 electrophoretic types, constituting 6 main divisions (I-VI) separated at genetic distances greater than 0.75. Several of the previously characterized treponemes revealed multiple bands of enzyme activity at several loci, indicating that they were not pure. The characterized strains usually clustered within established species, whereas fresh clinical isolates overlapped species borders. There was a large genetic difference between some reference and clinical strains, indicating that the latter may contain undescribed species. Treponema socranskii and Treponema denticola strains clustered in distinct divisions (IV and V, respectively), with the exception of T. dentic...Continue Reading

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Citations

Jan 1, 2009·Journal of Oral Microbiology·Trude HandalPia T Sunde
Aug 1, 1996·Endodontics & Dental Traumatology·U R DahleI Olsen
Feb 1, 1996·European Journal of Oral Sciences·U R DahleI Olsen
Dec 1, 1995·Oral Microbiology and Immunology·I OlsenJ L Johnson

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