The use of IS6110 as a marker for molecular epidemiological studies is limited when a Mycobacterium tuberculosis isolate has five or fewer copies of IS6110. Restriction fragment length polymorphism analysis with a highly polymorphic GC-rich repetitive sequence located in the plasmid pTBN12 (PGRS RFLP) and spoligotyping (based on the polymorphism of the DR region) are two frequently used seconda...

Background: Mycobacterial Interspersed Repetitive Units (MIRUs) that are located mainly in intergenic regions dispersed throughout the Mycobacterium tuberculosis genome. The selected MIRU loci, which were composed of a 12-locus set, demonstrated a high power for discrimination of Mycobacterium tuberculosis isolates collected from Kangwon province of Korea. To evaluate its ability to discriminat...

This is the first study describing the genetic polymorphism of Mycobacterium tuberculosis strains in the Indian Ocean Region. Using IS6110 RFLP analysis, 475 M. tuberculosis isolates from Madagascar, Comoros, Mauritius, Mozambique and La Reunion were compared. Of the 332 IS6110 profiles found, 43 were shared by clusters containing 2-65 strains. Six clusters were common to at least two countries...

BACKGROUND Variable-number tandem repeat (VNTR) typing is a promising method to discriminate the Mycobacterium tuberculosis isolates in molecular epidemiology. The purpose of this study is to determine the optimal VNTR combinations for discriminating isolated M. tuberculosis strains in Korea. METHODS A total of 317 clinical isolates collected throughout Korea were genotyped by using the IS611...

INTRODUCTION Characterization of Mycobacterium tuberculosis (MTB) isolates by DNA fingerprinting has contributed to tuberculosis (TB) control. The aim of this study was to determine the genetic diversity of MTB isolates from Tehran province in Iran. METHODS MTB isolates from 60 Iranian and 10 Afghan TB patients were fingerprinted by standard IS6110-restriction fragment length polymorphism (RFLP...

Assuming that the IS6110-restriction fragment length polymorphism (RFLP) changes at a constant rate of 3.2 years, this methodology was applied to demonstrate, for the first time, variant patterns of Mycobacterium tuberculosis (MTB) in multiple isolates obtained at short time intervals from sputum and blood of an HIV+ patient with multiple admissions to the Emergency Room and to the multidrug-re...

1. Abstract 2. Introduction 3. Genotyping methods 3.1. Genetic markers 3.1.1. Insertion sequences 3.1.2. Short repetitive DNA sequences 3.2. Restriction fragment length polymorphism analysis 3.2.1. IS6110 RFLP analysis 3.2.2. PGRS RFLP analysis 3.3. PCR-based typing 3.3.1. Mixed-linker PCR 3.3.2. Spoligotyping 3.3.3. VNTR and MIRU-VNTR typing 3.4. Comparison of genotyping methods 4. Molecular e...

OBJECTIVE To analyze the situation of tuberculosis infection by DNA fingerprinting in the middle and eastern part of Osaka, Japan. DESIGN We performed IS6110 restriction fragment length polymorphism (RFLP) on 1200 isolates from tuberculosis patients who visited our hospital from January 2001 to December 2003. A cluster was defined as a series of isolates with more than 90% similarity by IS611...

A combination of continuous and categorical tests, none of which is a gold standard, is often available for classification of subject status in epidemiologic studies. For example, tuberculosis (TB) molecular epidemiology uses select mycobacterial DNA sequences to provide clues about which cases of active TB are likely clustered, implying recent transmission between these cases, versus reactivat...

atively high death rate. About 30 percent of the world's population is latently infected with Mycobacterium tuberculosis. The annual incidence of all forms of TB is currently about 1.7 million globally, and is increasing. TB causes more health problems than any other disease caused by a single infectious agent. The increasing global TB burden is much more serious than in previous decades. This ...