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  • Title: Characterization of Actinomyces isolates from infected root canals of teeth: description of Actinomyces radicidentis sp. nov.
    Author: Collins MD, Hoyles L, Kalfas S, Sundquist G, Monsen T, Nikolaitchouk N, Falsen E.
    Journal: J Clin Microbiol; 2000 Sep; 38(9):3399-403. PubMed ID: 10970390.
    Abstract:
    Two strains of a previously undescribed Actinomyces-like bacterium were recovered in pure culture from infected root canals of teeth. Analysis by biochemical testing and polyacrylamide gel electrophoresis of whole-cell proteins indicated that the strains closely resembled each other phenotypically but were distinct from previously described Actinomyces and Arcanobacterium species. Comparative 16S rRNA gene-sequencing studies showed the bacterium to be a hitherto unknown subline within a group of Actinomyces species which includes Actinomyces bovis, the type species of the genus. Based on phylogenetic and phenotypic evidence, we propose that the unknown bacterium isolated from human clinical specimens be classified as Actinomyces radicidentis sp. nov. The type strain of Actinomyces radicidentis is CCUG 36733.
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