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Mycobacterium iranicum sp. nov., a rapidly growing scotochromogenic species isolated from clinical specimens on three different continents.

Journal article
Authors Hasan Shojaei
Charles Daley
Zoe Gitti
Abodolrazagh Hashemi
Parvin Heidarieh
Edward R.B. Moore
Abass Daei Naser
Cristina Russo
Jakko van Ingen
Enrico Tortoli
Published in International journal of systematic and evolutionary microbiology
Volume 63
Issue Pt 4
Pages 1383-9
ISSN 1466-5034
Publication year 2013
Published at Institute of Biomedicine, Department of Infectious Medicine
Pages 1383-9
Language en
Keywords Adolescent, Adult, Aged, Aged, 80 and over, Bacterial Typing Techniques, Cerebrospinal Fluid, microbiology, DNA, Bacterial, genetics, DNA, Ribosomal Spacer, genetics, DNA-Directed RNA Polymerases, genetics, Fatty Acids, analysis, Female, Greece, Heat-Shock Proteins, genetics, Humans, Iran, Italy, Male, Microbial Sensitivity Tests, Middle Aged, Molecular Sequence Data, Mycobacterium, classification, genetics, isolation & purification, Mycobacterium Infections, microbiology, Mycolic Acids, analysis, Netherlands, Phylogeny, RNA, Ribosomal, 16S, genetics, Sequence Analysis, DNA, Sputum, microbiology, Sweden, United States, Wounds and Injuries, microbiology, Young Adult
Subject categories Clinical Medicine


The isolation and characterization of a novel, rapidly growing, scotochromogenic mycobacterial species is reported. Eight independent strains were isolated from clinical specimens from six different countries of the world, two in Iran, two in Italy and one in each of following countries: Greece, The Netherlands, Sweden and the USA. Interestingly, two of the strains were isolated from cerebrospinal fluid. The strains were characterized by rapid growth and presented orange-pigmented scotochromogenic colonies. DNA-based analysis revealed unique sequences in the four regions investigated: the 16S rRNA gene, the rRNA gene internal transcribed spacer 1 and the genes encoding the 65 kDa heat-shock protein and the beta-subunit of RNA polymerase. The phylogenetic analysis placed the strains among the rapidly growing mycobacteria, being most closely related to Mycobacterium gilvum. The genotypic and phenotypic data both strongly supported the inclusion of the strains investigated here as members of a novel species within the genus Mycobacterium; the name Mycobacterium iranicum sp. nov. is proposed to indicate the isolation in Iran of the first recognized strains. The type strain is M05(T) ( = DSM 45541(T) = CCUG 62053(T) = JCM 17461(T)).

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