Comparison of Phenotypic and Genotypic Methods for Pyrazinamide Susceptibility Testing with Mycobacterium tuberculosis
نویسندگان
چکیده
منابع مشابه
Comparison of phenotypic and genotypic methods for pyrazinamide susceptibility testing with Mycobacterium tuberculosis.
Mycobacterium tuberculosis converts pyrazinamide to its active form by using the enzyme pyrazinamidase. This enzyme is coded for on the pncA gene, and mutations in the pncA gene result in absence of active enzyme, conferring resistance to the drug pyrazinamide. We investigated 27 strains of Mycobacterium tuberculosis suspected of being multidrug resistant. Each isolate was tested for susceptibi...
متن کاملComparison of phenotypic and genotypic methods for pyrazinamide susceptibility testing.
OBJECTIVES To evaluate Pyrazinamide (PZA) susceptibility results obtained by phenotypic MGIT 960 TB system against enzymatic Pyrazinamidase assay and genotypic pncA gene sequencing. To find the prevalence of infections caused by M. bovis in PZA resistant M. tuberculosis complex isolates. METHODS 33 consecutive PZA resistant and 30 consecutive PZA susceptible isolates reported for PZA suscepti...
متن کاملTesting of susceptibility of Mycobacterium tuberculosis to pyrazinamide: comparison of Bactec method with pyrazinamidase assay.
The susceptibility of 428 clinical isolates of Mycobacterium tuberculosis to pyrazinamide was assessed by the Bactec method and the Wayne pyrazinamidase assay. The correlation between the two tests was 98.2 and 100% for susceptible and resistant strains, respectively. False resistance was seen in four (0.8%) strains with the Bactec test, and false-susceptible results occurred in two (0.5%) pyra...
متن کاملRapid pyrazinamide susceptibility testing of Mycobacterium tuberculosis by flow cytometry.
The resurgence of tuberculosis along with the increased resistance of Mycobacterium tuberculosis has emphasized the need for timely susceptibility testing for control of the disease. Previous studies have shown that rapid susceptibility testing can be accomplished for isoniazid, ethambutol, and rifampin using the flow cytometric assays. In this study we compared the flow cytometric susceptibili...
متن کاملEvaluation of methods for testing the susceptibility of clinical Mycobacterium tuberculosis isolates to pyrazinamide.
Pyrazinamide (PZA) is a first-line antituberculosis (anti-TB) drug capable of killing nonreplicating, persistent Mycobacterium tuberculosis. However, reliable testing of the susceptibility of M. tuberculosis to PZA is challenging. Using 432 clinical M. tuberculosis isolates, we compared the performances of five methods for the determination of M. tuberculosis susceptibility to PZA: the MGIT 960...
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ژورنال
عنوان ژورنال: Journal of Clinical Microbiology
سال: 2000
ISSN: 0095-1137,1098-660X
DOI: 10.1128/jcm.38.10.3686-3688.2000