OBJECTIVE The BACTEC MGIT 960 drug susceptibility system (MGIT AST) has been recently introduced in Japan. The issue of discordant MGIT results compared with the conventionally used Ogawa method has been raised. It has been speculated that discordant results might be due to MGIT inoculum density since there is no standardization step other than dilution of growth for tubes beyond 2 days after M...

OBJECTIVES Tentative standards for testing MICs for Mycobacterium tuberculosis include agar dilution and the BACTEC method. However, the conventional agar dilution method requires 3-5 weeks to complete; whereas BACTEC, although a rapid test, involves the use of radioisotopes. In contrast, the MGIT 960 system uses a fluorescence quenching based oxygen sensor that can be read automatically. This ...

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...

OBJECTIVE To evaluate available evidence on the diagnostic value of radioactivity-free cultivation and detection technologies for rapid detection of rifampicin resistance in Mycobacterium tuberculosis. METHODS A fully recursive literature search was conducted in PubMed, EMBASE, Biosis, Web of Science (all 1990-2010), CBMWeb (1978-2010), and Google Scholar. QUADAS items were used to evaluate t...

The reliability of the BACTEC MGIT 960 system, an automated version of the Mycobacteria Growth Indicator Tube (MGIT), for antimicrobial susceptibility testing of Mycobacterium tuberculosis was evaluated on 78 clinical isolates. Rifampin (RMP), isoniazid (INH), streptomycin (SM), and ethambutol (EMB) were tested at the following concentrations: 1.0 microg/ml for RMP, 0.1 and 0.4 microg/ml for IN...

BACKGROUND To compare Bactec MGIT 960 with LJ media in terms of time taken for the initial isolation of mycobacteria. METHODS A total of 100 AFB (acid fast bacillus) positive sputum samples were processed and inoculated in both the Lowenstein Jensen (LJ) media and mycobacterium growth indicator tube (MGIT) tubes. RESULTS Of the 100 samples, positive growth was obtained from all the samples ...

The purpose of this study was to establish a standardized protocol for second-line antimicrobial susceptibility testing of Mycobacterium tuberculosis using the Bactec MGIT 960 system in Canadian laboratories. Four Canadian public health laboratories compared the susceptibility testing results of 9 second-line antimicrobials between the Bactec 460 and Bactec MGIT 960 systems. Based on the data g...

INTRODUCTION Clinical samples from 433 patients pre-diagnosed with tuberculosis in Konya, Turkey, were investigated prospectively to compare the GenoType(®) MTBC test (GenoType(®) MTBC) with conventional "gold standard" culture methods. MATERIAL AND METHODS Lowenstein Jensen (LJ) and Mycobacteria Growth Indicator Tube (MGIT)-960 culture methods and GenoType(®) MTBC were performed together. ...

OBJECTIVES The aim of this study was to assess the sensitivity, specificity and time to results of mycobacterial growth indicator tube (MGIT) 960, microscopic observation drug susceptibility (MODS) assay and nitrate reductase assay (NRA) compared with the gold standard agar proportion method (PM), and to determine whether there is cross-resistance between older-generation fluoroquinolones and m...

The reliability of the Mycobacteria Growth Indicator Tube (MGIT) 960 system for rapid antimicrobial susceptibility testing (AST) of Mycobacterium tuberculosis was evaluated. Forty-seven isolates, including 10 fully susceptible and 37 resistant strains, were tested for susceptibility to the critical concentrations of streptomycin (STR), isoniazid (INH), rifampin (RMP), and ethambutol (EMB), as r...