title: Use of the MGB Eclipse system and SmartCycler PCR for differentiation of Mycobacterium chelonae and M. abscessus.
abstract: Although accurate in the identification of Mycobacterium species, partial 16S rRNA gene sequencing does not distinguish Mycobacterium chelonae from M. abscessus. Thus, we designed a SmartCycler PCR assay targeting the 16S-to-23S internal transcribed spacer (ITS) region with use of MGB Eclipse probes to distinguish each species. Comparison with PCR-restriction enzyme analysis of a 441-bp fragment of the hsp65 gene resulted in 100% correlation with 25 isolates of M. chelonae and 25 isolates of M. abscessus. ITS PCR performed on 90 consecutive isolates identified by partial 16S rRNA gene sequencing (26 isolates of the M. chelonae-M. abscessus complex and 64 remaining isolates, including Mycobacterium species, Nocardia species, and other aerobic actinomycetes) showed 100% specificity and sensitivity. The ITS PCR assay is accurate and specific, easy to perform, and a good supplemental test when using partial 16S rRNA gene sequencing to identify M. chelonae and M. abscessus.
authors.affiliation: ARUP Institute for Clinical and Experimental Pathology, 500 Chipeta Way, Salt Lake City, UT 84108, USA. cloudjl@aruplab.com
authors.forename: Joann L
authors.initials: JL
authors.lastname: Cloud
authors.forename: Karen
authors.initials: K
authors.lastname: Hoggan
authors.forename: Evgeniy
authors.initials: E
authors.lastname: Belousov
authors.forename: Samuel
authors.initials: S
authors.lastname: Cohen
authors.forename: Barbara A
authors.initials: BA
authors.lastname: Brown-Elliott
authors.forename: Linda
authors.initials: L
authors.lastname: Mann
authors.forename: Rebecca
authors.initials: R
authors.lastname: Wilson
authors.forename: Wade
authors.initials: W
authors.lastname: Aldous
authors.forename: Richard J
authors.initials: RJ
authors.lastname: Wallace
authors.forename: Gail L
authors.initials: GL
authors.lastname: Woods
mesh_terms: D016926:Mycobacterium chelonae / Q000145:classification* / Q000235:genetics; D009170:Nontuberculous Mycobacteria / Q000145:classification* / Q000235:genetics; D016133:Polymerase Chain Reaction / Q000379:methods*; D012336:RNA, Ribosomal, 16S / Q000737:chemistry / Q000235:genetics; D012680:Sensitivity and Specificity
chemical_list: D012336:RNA, Ribosomal, 16S