Mycobacterium nebraskense sp. nov., a novel slowly growing scotochromogenic species

Amr M. Mohamed, Peter C. Iwen, Stefano Tarantolo, Steven H. Hinrichs

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


The characterization of a novel slowly growing, scotochromogenic Mycobacterium species is reported. This previously undescribed mycobacterial species was isolated from five different patients with symptomatic pulmonary infections. All isolates were acid-fast-positive and the mycolic acid profiles were unique and supported placement into the genus Mycobacterium. Phenotypic characteristics of each strain included optimal growth after 3 weeks at a temperature range of 30-35 °C, yellow pigmentation after incubation in the dark and production of a heat-stable catalase. The 16S rRNA gene and internal transcribed spacer 1 sequences were identical for all five strains, but distinct from all known mycobacterial species. Phylogenetic analysis based on the 16S rRNA gene sequence placed the novel species within the slowly growing mycobacteria group in close proximity to Mycobacterium malmoense, Mycobacterium avium, Mycobacterium kansasii and Mycobacterium scrofulaceum. These data support the conclusion that the related five described organisms represent a novel Mycobacterium species, for which the name Mycobacterium nebraskense sp. nov. is proposed, with the type strain UNMC-MY1349T (=ATCC BAA-837T = DSM 44803T).

Original languageEnglish (US)
Pages (from-to)2057-2060
Number of pages4
JournalInternational Journal of Systematic and Evolutionary Microbiology
Issue number6
StatePublished - Nov 2004

ASJC Scopus subject areas

  • Microbiology
  • Ecology, Evolution, Behavior and Systematics


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