In tuberculosis treatment, susceptibility is defined by a critical concentration of 1.0 mg/liter for rifampin and 0.2 or 1.0 mg/liter for low- and high-level isoniazid resistance on the basis of an epidemiologic cutoff method that uses the distribution of the MICs for isolates. However, pharmacokinetics-pharmacodynamics-based clinical trial simulations suggested that the breakpoints should be 0...

Mycobacterium kansasii is one of the most pathogenic and frequent nontuberculous mycobacteria isolated from humans. Patients with adverse drug reactions, resistant isolates, or suboptimal response require alternative treatment regimens. One hundred forty-eight consecutive clinical isolates of M. kansasii were tested for antimicrobial susceptibilities by the BACTEC 460 system (NCCLS) with two di...

tuberculosis remains a major public health problem in both developing and developed countries. drug-resistant tuberculosis is an increasing health problem and serious challenge to tuberculosis (tb) control programs. information about the susceptibility pattern of mycobacterium tuberculosis isolates against anti-tuberculosis drugs is an important aspect to tb control. the objectives of the study...

Emergence of resistance to two most potent first line anti-TB drugs i.e. isoniazid and rifampicin (multidrug resistant TB MDR TB) is well known, but, the second line drugs used to treat MDR-TB are also showing resistance to the same strain of Mycobacteria (extensively drug resistance TB, XDR-TB). We report 3 children with partial XDR TB. Two responded to treatment while one was lost to follo...

We describe the design, development, analytical performance, and a limited clinical evaluation of 10-color Xpert MTB/XDR assay (CE-IVD only, not for sale in United States). This is intended as reflex test to detect resistance isoniazid (INH), fluoroquinolones (FLQ), ethionamide (ETH), second-line injectable drugs (SLIDs) unprocessed sputum samples concentrated sediments which are positive Mycob...

In a previous publication (1), we evaluated the Genotype MTBDR (GT-MTBDR; Hain Lifescience, Nehren, Germany) assay as a rapid diagnostic tool for multidrug resistance (MDR) detection in Mycobacterium tuberculosis isolates and clinical specimens. The main limitation of the test was the low sensitivity for isoniazid resistance detection (70%), due to the targeting of only one (katG) of the genes ...

For the past decade, there have been no data on the time course of drug resistant tuberculosis and on risk factors for drug resistance in former West Germany. We reviewed the medical records of all patients with positive cultures for Mycobacterium tuberculosis from 1984 until 1993 in a hospital near Hamburg. Drug-susceptibility testing was performed for isoniazid, rifampicin, ethambutol, and st...

Tuberculosis remains a major public health problem in both developing and developed countries. Drug-resistant tuberculosis is an increasing health problem and serious challenge to tuberculosis (TB) control programs. Information about the susceptibility pattern of Mycobacterium tuberculosis isolates against anti-tuberculosis drugs is an important aspect to TB control. The objectives of the s...