Significance of mutations in embB codon 306 for prediction of ethambutol resistance in clinical Mycobacterium tuberculosis isolates.
نویسندگان
چکیده
We analyzed 159 Mycobacterium tuberculosis isolates (101 ethambutol [EMB]-resistant strains, 33 multidrug-resistant but not EMB-resistant strains, and 25 fully susceptible strains) for the presence of mutations in embB codon 306 (embB306). Mutations were detected only in EMB-resistant strains (n = 69; 68%), thus confirming the significance of embB306 mutations for the prediction of resistance to EMB.
منابع مشابه
Detection of Ethambutol-Resistant Associated Mutations in Mycobacterium tuberculosis Isolates from Iran Using Multiplex Allele-Specific PCR
Tuberculosis is a serious global public health problem and its high prevalence is stron gly associated with the enhancement of drug resistance. In this study we demonstrate a multiplex allele-specific polymerase chain reaction (MAS)-PCR assay to simultaneously detect mutations in the first and third bases of the embB gene codon 306 ATG in ethambutol (EMB) resistant isolates of Mycobacterium t...
متن کاملMutations at embB codon 306 are an important molecular indicator of ethambutol resistance in Mycobacterium tuberculosis.
Ethambutol resistance in clinical Mycobacterium tuberculosis isolates is associated primarily with missense mutations in the embB gene. However, recent reports have described the presence of embB mutations, especially those at embB codon 306, in isolates susceptible to ethambutol. To clarify the role of embB mutations in ethambutol resistance, we sequenced the ethambutol resistance-determining ...
متن کاملMutations in the embB Gene and Their Association with Ethambutol Resistance in Multidrug-Resistant Mycobacterium tuberculosis Clinical Isolates from Poland
Ethambutol (EMB) continues to be used as part of a standard drug regimen for the treatment of tuberculosis (TB). Mutations in the embB gene and those within its conserved EMB resistance determining region (ERDR) in particular have repeatedly been associated with resistance to EMB in Mycobacterium tuberculosis. The aim of this study was to examine the mutational "hot spots" in the embB gene, inc...
متن کاملCharacteristics of embB mutations in multidrug-resistant Mycobacterium tuberculosis isolates in Henan, China
OBJECTIVES To determine the association between embB mutations and drug resistance, and to further investigate the mechanism of embB mutations involved in the development of ethambutol and multidrug resistance in Mycobacterium tuberculosis. METHODS One hundred and thirty-eight multidrug-resistant clinical M. tuberculosis isolates, including 86 ethambutol-resistant and 52 ethambutol-susceptibl...
متن کاملMolecular Analysis of the embCAB Locus and embR Gene Involved in Ethambutol Resistance in Clinical Isolates of Mycobacterium tuberculosis in France.
Modification of codon 306 in embB is regarded as the main mechanism leading to ethambutol (ETB) resistance in clinical isolates of Mycobacterium tuberculosis. However, numerous mutations elsewhere in the embCAB locus and in embR, a putative transcriptional activator of this locus, have been reported to be involved in ETB resistance. Here, we investigated the diversity of nucleotide variations o...
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عنوان ژورنال:
- Antimicrobial agents and chemotherapy
دوره 50 5 شماره
صفحات -
تاریخ انتشار 2006