Mutations in the rpoB gene of rifampin-resistant Mycobacterium tuberculosis strains isolated mostly in Asian countries and their rapid detection by line probe assay.
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.
Hirano
K
K
Research Institute of Tuberculosis, Japan Anti-Tuberculosis Association, Kiyose-shi, Tokyo 204-0022, Japan.
Abe
C
C
Takahashi
M
M
D000904:Antibiotics, Antitubercular / Q000494:pharmacology; D001208:Asia / Q000453:epidemiology; D012321:DNA-Directed RNA Polymerases / Q000235:genetics*; D004352:Drug Resistance, Microbial / Q000235:genetics*; D006801:Humans; D009154:Mutation; D009169:Mycobacterium tuberculosis / Q000187:drug effects / Q000235:genetics* / Q000302:isolation & purification; D012293:Rifampin / Q000494:pharmacology; D014376:Tuberculosis / Q000453:epidemiology / Q000382:microbiology*
D000904:Antibiotics, Antitubercular; D012321:DNA-Directed RNA Polymerases; C105078:RNA polymerase beta subunit; D012293:Rifampin