Differential Sensitivity of Mycobacteria to Isoniazid Is Related to Differences in KatG-Mediated Enzymatic Activation of the Drug

Abstract excerpt

Isoniazid (INH) is a cornerstone of antitubercular therapy. Mycobacterium tuberculosis complex bacteria are the only mycobacteria sensitive to clinically relevant concentrations of INH. All other mycobacteria, including M. marinum and M. avium subsp. paratuberculosis are resistant. INH requires activation by bacterial KatG to inhibit mycobacterial growth. We tested the role of the differences between M....

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