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Journal of Clinical Microbiology, June 2001, p. 2102-2109, Vol. 39, No. 6
Department of Microbiology, Cheju National
University College of Medicine, Cheju 690-7561,1
Department of Microbiology, Institute of Endemic Diseases,
SNUMRC,2 Cancer Research Center, Seoul
National University College of Medicine,3 and
Clinical Research Institute, Seoul National University
Hospital,4 Seoul 110-799, Department of
Pediatrics, Pundang CHA General Hospital, Pochun CHA Medical School,
Kyonggi-do Sungnam 463-670,5 and The
Korean Institute of Tuberculosis, The Korean National Tuberculosis
Association, Seoul 137-140,6 Korea
Received 16 October 2000/Returned for modification 2 January
2001/Accepted 8 April 2001
PCR amplification-restriction analysis (PRA) of rpoB
DNA (342 bp), which comprises the Rifr region, was used for
the differential identification of 49 mycobacteria. The DNA had been
used previously for the identification of mycobacterial species by
comparative sequence analysis (B. J. Kim et al., J. Clin.
Microbiol. 37:1714-1720, 1999). Digestion with four restriction enzymes (HaeIII, HindII, MvaI, and
AccII), which were selected on the basis of
rpoB DNA sequences, generated distinctive PRA patterns that
allowed not only the reference strains but also the clinical isolates
of mycobacteria to be distinguished. Both rapidly and slowly growing
mycobacteria were distinctly differentiated by HaeIII
digestion of the amplified rpoB DNA. By HindII
digestion the Mycobacterium tuberculosis complex was
distinguished from the other mycobacteria. Furthermore, six subspecies
of Mycobacterium kansasii (subspecies I to VI) as well as
the closely related Mycobacterium gastri, and other closely
related species, were distinguished by simultaneous digestion of
MvaI and AccII. According to the rpoB PRA scheme, 240 strains of clinical isolates could be
identified. It was also possible to detect and identify M. tuberculosis directly from sputa and bronchoalveolar lavage
specimens. These results suggest that PRA of rpoB DNA is a
simple and feasible method not only for the differentiation of culture
isolates but also for the rapid detection and identification of
pathogenic mycobacteria in primary clinical specimens.
0095-1137/01/$04.00+0 DOI: 10.1128/JCM.39.6.2102-2109.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.
Differentiation of Mycobacterial Species by
PCR-Restriction Analysis of DNA (342 Base Pairs) of the RNA
Polymerase Gene (rpoB)
*
Corresponding author. Mailing address: Department of
Microbiology, Seoul National University College of Medicine, 28 Yongon-dong, Chongno-gu, Seoul 110-799, Korea. Phone: (82) 2-740-8306. Fax: (82) 2-743-0881. E-mail:
yhkook{at}plaza.snu.ac.kr.
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