[Phenotypic characterization of pyrazinamide-resistant Mycobacterium tuberculosis isolated in Poland].

Abstract excerpt

INTRODUCTION: Pyrazinamide (PZA) is an important first-line antituberculous drug, which is applied together with INH, RMP, EMB and SM. This drug plays a unique role in the first phase of TB therapy because it is active within macrophages and kills tubercule bacilli. Testing of the resistibility of Mycobacterium tuberculosis to PZA is technically difficult because PZA is active only at acid pH. Therefore routine...

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