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Journal of Clinical Microbiology, 01 1997, 25-32, Vol 35, No. 1
M Picardeau, G Prod'Hom, L Raskine, MP LePennec and V Vincent
Different molecular typing methods including restriction fragment length
polymorphism (RFLP) analysis with the major polymorphic tandem repeat
(MPTR) probe and the IS1652 probe, pulsed-field gel electrophoresis (PFGE),
amplified fragment length polymorphism (AFLP) analysis, and PCR restriction
analysis of the hsp-65 gene (PRA) were applied to clinical and water
isolates of Mycobacterium kansasii. RFLP with the MPTR probe, PRA, PFGE,
and AFLP analysis revealed five homogeneous clusters which appeared to be
subspecies. RFLP with the MPTR probe and PRA gave patterns specific for
each cluster, whereas PFGE and AFLP analysis gave polymorphic patterns.
IS1652 was present in two of the five clusters and provided polymorphic
patterns for one cluster only. The two IS1652-positive clusters were
Accuprobe negative (Accuprobe test; Gen-Probe Inc.), and only two other
clusters were Accuprobe positive. A PCR test based on the detection of a
species- specific fragment (M. Yang, B.C. Ross, and B. Dwyer, J. Clin.
Microbiol. 31:2769-2772, 1993) was positive for all M. kansasii strains.
This PCR test is an accurate, rapid, and specific M. kansasii
identification test. No subspecies was particularly more virulent, because
all clusters contained clinical strains, from AIDS patients and non-AIDS
patients, and environmental strains.
Copyright © 1997 by the American Society for Microbiology. All rights reserved.
Genotypic characterization of five subspecies of Mycobacterium kansasii
Laboratoire de Reference des Mycobacteries, Institut Pasteur, Paris, France.
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