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Journal of Clinical Microbiology, August 1999, p. 2663-2666, Vol. 37, No. 8
0095-1137/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

Mutations in the rpoB Gene of Rifampin-Resistant Mycobacterium tuberculosis Strains Isolated Mostly in Asian Countries and Their Rapid Detection by Line Probe Assay

Kazue Hirano, Chiyoji Abe,* and Mitsuyoshi Takahashi

Research Institute of Tuberculosis, Japan Anti-Tuberculosis Association, Kiyose-shi, Tokyo 204-0022, Japan

Received 4 February 1999/Returned for modification 26 March 1999/Accepted 24 April 1999

Mutations in the rpoB gene of 90 rifampin-resistant Mycobacterium tuberculosis isolates mostly from Asian countries were analyzed. Ten distinct single-nucleotide substitutions were found among the isolates by automated sequencing. A 3-nucleotide insertion was found in two isolates, and no mutation was found in five isolates (5.6%). A reverse hybridization-based line probe assay (INNO-LiPA Rif TB) for rapid detection of the mutations was evaluated with these isolates. Concordance rates with sequencing results for five wild-type probes (S probes) and four probes for specific mutations (R probes) were 96.7 and 100%, respectively. The overall concordance rate with the in vitro susceptibility testing results was 92.2% (83 of 90 isolates). These results indicate that a commercial line probe assay kit may be useful for rapid diagnosis of rifampin-resistant tuberculosis.


* Corresponding author. Mailing address: Research Institute of Tuberculosis, Japan Anti-Tuberculosis Association, Kiyose-shi, Tokyo 204-0022, Japan. Phone: 81-424-93-5773. Fax: 81-424-92-4600.


Journal of Clinical Microbiology, August 1999, p. 2663-2666, Vol. 37, No. 8
0095-1137/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.



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Copyright © 1999 by the American Society for Microbiology. All rights reserved.