Description of mycobacterium chelonae subsp. Bovis subsp. nov., isolated from cattle (bos taurus coreanae), emended description of mycobacterium chelonae and creation of mycobacterium chelonae subsp. chelonae subsp. nov

Byoung Jun Kim, Ga Na Kim, Bo Ram Kim, Che Ok Jeon, Joseph Jeong, Seon Ho Lee, Ji Hun Lim, Seung Heon Lee, Chang Ki Kim, Yoon Hoh Kook, Bum Joon Kim

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    5 Citations (Scopus)

    Abstract

    Three rapidly growing mycobacterial strains, QIA-37T, QIA-40 and QIA-41, were isolated from the lymph nodes of three separate Korean native cattle, Hanwoo (Bos taurus coreanae). These strains were previously shown to be phylogenetically distinct but closely related to Mycobacterium chelonae ATCC 35752T by taxonomic approaches targeting three genes (16S rRNA, hsp6 and rpoB) and were further characterized using a polyphasic approach in this study. The 16S rRNA gene sequences of all three strains showed 99.7% sequence similarity with that of the M. chelonae type strain. A multilocus sequence typing analysis targeting 10 housekeeping genes, including hsp65 and rpoB, revealed a phylogenetic cluster of these strains with M. chelonae. DNA–DNA hybridization values of 78.2% between QIA-37T and M. chelonae indicated that it belongs to M. chelonae but is a novel subspecies distinct from M. chelonae. Phylogenetic analysis based on whole-genome sequences revealed a 95.44±0.06%average nucleotide identity (ANI) value with M. chelonae, slightly higher than the 95.0% ANI criterion for determining a novel species. In addition, distinct phenotypic characteristics such as positive growth at 37 °C, at which temperature M. chelonae does not grow, further support the taxonomic status of these strains as representatives of a novel subspecies of M. chelonae. Therefore, we propose an emended description of Mycobacterium chelonae, and descriptions of M. chelonae subsp. chelonae subsp. nov. and M. chelonae subsp. bovis subsp. nov. are presented; strains ATCC 35752T(=CCUG 47445T=CIP 104535T=DSM 43804T=JCM 6388T=NCTC 946T) and QIA-37T (=KCTC 39630T=JCM 30986T) are the type strains of the two novel subspecies.

    Original languageEnglish
    Article number002217
    Pages (from-to)3882-3887
    Number of pages6
    JournalInternational Journal of Systematic and Evolutionary Microbiology
    Volume67
    Issue number10
    DOIs
    Publication statusPublished - 2017 Oct

    Keywords

    • Multilocus sequence typing
    • Mycobacterium chelonae
    • Mycobacterium chelonae subsp. Bovis
    • Mycobacterium chelonae subsp. chelonae
    • Rapid growing mycobacteria

    ASJC Scopus subject areas

    • Microbiology
    • Ecology, Evolution, Behavior and Systematics

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