A rapid in-house polymerase chain reaction (PCR) assay is described for the direct detection of Mycobacterium tuberculosis complex in clinical material. Its performance is compared with two kit based systems. The results of the in-house assay were comparable with the commercial assays, detecting M tuberculosis in 100% of smear positive, culture positive samples. The in-house assay proved to be ...

PURPOSE PCR is widely used for rapidly and accurately detecting Mycobacterium species. The purpose of this study was to assess the diagnostic performance of three real-time PCR kits and evaluate the concordance with two older PCR methods. MATERIALS AND METHODS Using 128 samples, the five PCR methods were assessed, including an in-house PCR protocol, the COBAS Amplicor MTB, the COBAS TaqMan MT...

Tuberculosis (TB) is a serious lung infection caused by the bacterium Mycobacterium tuberculosis ( M. ) highly contagious, and can be spread through air from an infected person to others. The aim of this article was evaluate immunological role CD4 CD20 in patients with multi-drug resistant (MDRTB). A total 182 individuals suspected admitted center AL-Najaf City, Iraq. sputum acid-fast stain per...

Objective : The study aimed to evaluate molecular and immunological methods propose a workflow using them for tuberculosis (TB) diagnosis routine. Methods A cross-sectional retrospective was performed, including 121 liquid cultures from TB laboratory located in the extreme south of Brazil. All were positive Mycobacterium complex (MTBC) by in-house Polymerase Chain Reaction (PCR) DNA extracted C...

Nontuberculous mycobacteria are often underdiagnosed due to lack of proper diagnostic facilities. To overcome this, we created a rapid PCR method for the species-specific diagnosis of Mycobacterium tuberculosis and its differentiation from other mycobacteria. A set of PCR primers targeting the gene encoding for early-secreted antigen-6 (ESAT-6) of the M. tuberculosis complex was designed and st...

With the objective to evaluate PCR-mediated detection of Mycobacterium tuberculosis DNA as a diagnostic procedure for diagnosis of tuberculosis in individuals attending ambulatory services in Primary Health Units of the City Tuberculosis Program in Rio de Janeiro, Brazil, their sputum samples were collected and treated with a DNA extraction procedure using silica-guanidiniumthiocyanate. This pr...

The use of the COBAS AMPLICOR System (Roche Molecular Diagnostics, Basel, Switzerland), the only automated system for PCR testing, was evaluated for a rapid identification of mycobacteria with positive BACTEC 12B cultures. Two hundred ninety-six specimens with a growth index of >/=30 were analyzed for the presence of Mycobacterium tuberculosis complex, Mycobacterium avium, and Mycobacterium int...

We describe a multiplex PCR assay to detect the Mycobacterium tuberculosis Beijing genotype variant B0/W148, which is considered a "successful" clone of M. tuberculosis, widespread in Russia. Specificity and sensitivity of the assay were 100% based on the analysis of a collection of 516 M. tuberculosis isolates of different genotypes and origins. This assay may be used for accurate and simple d...