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Association between embB Codon 306 Mutations and Drug Resistance in Mycobacterium tuberculosis

ABSTRACT embB306 mutants were detected in both ethambutol (EMB)-resistant and EMB-susceptible strains of Mycobacterium tuberculosis. Multidrug-resistant (MDR) strains had a higher proportion of embB306 mutants than non-MDR strains (odds ratio, 6.78; P < 0.001). The embB306 locus is a candidate marker for rapid detection of MDR and extremely drug resistant tuberculosis.