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Clonal distribution of natural competence in Actinobacillus actinomycetemcomitans.
Umeå University, Faculty of Medicine, Odontology, Oral Microbiology.
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2004 (English)In: Oral Microbiology and Immunology, ISSN 0902-0055, Vol. 19, no 5, 340-342 p.Article in journal (Refereed) Published
Abstract [en]

The competence for natural transformation was investigated in 67 Actinobacillus actinomycetemcomitans strains. The transformation assays were performed with both cloned DNA fragments and chromosomal markers of A. actinomycetemcomitans. Competence was found in 12 of 18 serotype a strains, 0 of 21 serotype b strains, 0 of 14 serotype c strains, 3 of 6 serotype d strains, 3 of 4 serotype e strains, 0 of 3 serotype f strains, and 0 of 1 nonserotypeable strain. The transformation frequencies varied from 5 x 10(-3) to 4 x 10(-6) (median 1.5 x 10(-4)). The distribution pattern of natural competence is concordant with the major clonal lineages of A. actinomycetemcomitans. Serotype a strains are predominantly competent for transformation, while serotypes b and c strains are apparently non-competent.

Place, publisher, year, edition, pages
2004. Vol. 19, no 5, 340-342 p.
URN: urn:nbn:se:umu:diva-17425DOI: 10.1111/j.1399-302x.2004.00157.xPubMedID: 15327649OAI: diva2:157098
Available from: 2007-11-08 Created: 2007-11-08 Last updated: 2009-10-06Bibliographically approved

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