Four strains isolated in the last 15 years were revealed to be identical in their 16S rRNA gene sequences to MCRO19, the sequence of which was deposited in GenBank in 1995. In a polyphasic analysis including phenotypic and genotypic features, the five strains (including MCRO19), which had been isolated in four European countries, turned out to represent a unique taxonomic entity. They are scotochromogenic slow growers and are genetically related to the group that included Mycobacterium simiae and 15 other species. The novel species Mycobacterium europaeum sp. nov. is proposed to accommodate these five strains. Strain FI-95228 T (5DSM 45397 T =CCUG 58464 T) was chosen as the type strain. In addition, a thorough revision of the phenotypic and genotypic characters of the species related to M. simiae was conducted which leads us to suggest the denomination of the 'Mycobacterium simiae complex' for this group. © 2011 IUMS.

Mycobacterium europaeum sp. nov., a scotochromogenic species related to the Mycobacterium simiae complex / Tortoli, Enrico; Böttger, Erik C.; Fabio, Anna; Falsen, Enevold; Gitti, Zoe; Grottola, Antonella; Klenk, Hans-Peter; Mannino, Roberta; Mariottini, Alessandro; Messinò, Massimino; Pecorari, Monica; Rumpianesi, Fabio. - In: INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY. - ISSN 1466-5034. - 61:7(2011), pp. 1606-1611.

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