Objective: The Rifampicin resistance and susceptibility of Mycobacterium tuberculosis are caused by mutations in the 81-base pair region of the rpoB gene encoding the b-subunit of RNA polymerase. Methods: Isoniazid resistance of M. tuberculosis is related to mutations in inha , oxyR and ahpC genes which 30 to 90 percent of Isoniazid resistance is occurred in 3015 codons of kat...

Mycobacterium tuberculosis complex (MTBC) genomes contain 2 large gene families termed pe and ppe. The function of pe/ppe proteins remains enigmatic but studies suggest that they are secreted or cell surface associated and are involved in bacterial virulence. Previous studies have also shown that some pe/ppe genes are polymorphic, a finding that suggests involvement in antigenic variation. Usin...

Mycobacterial species fill a wide variety of evolutionary niches. The most vigorously studied member of the genus is Mycobacterium tuberculosis, the causative agent of human tuberculosis (13). M. tuberculosis was responsible for an estimated 1.6 million deaths worldwide in 2002, making it second to only HIV in mortality attributed to an infectious disease (2). Mycobacterium bovis and Mycobacter...

several reports have indicated that infection with non-tuberculosis mycobacteria (ntm) is increasing worldwide.therefore,monitoring species causing micobacterial infection in any region is of great importance. this study was going to detect, differentiate, and identify pathogenic mycobacteria in primary clinical samples. eighty samples collected from tuberculosis suspected patients in isfahan/i...

introduction: infections by multidrug resistant mycobacterium tuberculosis (mdr-tb) is a major public health challenge. secretion of proteins by m. tuberculosis plays an important role in the pathogenesis of the bacterium. we compared the protein profiles of susceptible m. tuberculosis and mdr-tb isolates using proteomic analyses, namely two dimensional gel electrophoresis (2de) and mass spectr...

Investigating the Effects of Changing Pattern AIDS Transmission on Prevalence Mycobacterium Tuberculosis in Patients with HIV by Microscopic and Molecular Methods

Introducción: la infección tuberculosa latente es un estado de respuesta inmune tipo hipersensibilidad celular retardada del organismo a estimulación por antígenos Mycobacterium tuberculosis sin evidencia clínica y radiológica tuberculosis. Puede ser diagnosticada mediante prueba tuberculina o derivado proteico purificado tuberculina.

anti-adhesion therapy represents a potentially promising avenue for the treatment and prevention of tuberculosis in a post-antibiotic era. adhesins are surface-exposed microbial structures or molecules that enable pathogenic organisms to adhere to host surfaces, a fundamental step towards host infection. although several mycobacterium tuberculosis adhesins have been identified, it is predicted ...