OBJECTIVE: To analyse possible associations of specific mutations conferring rifampicin (RMP) and isoniazid (INH) resistance with Beijing and non Beijing genotype strains of Mycobacterium tuberculosis from Kazakhstan. METHOD: Genotypic analysis of 92 multidrug-resistant (MDR), 50 INH but not RMP-resistant (INHr/RMPs) and 10 fully susceptible strains of M. tuberculosis from Kazakhstan was performed. In the MDR group, 59 strains (64.1%), and within the INHr/RMPs group, 32 strains (64.0%) were classified as Beijing genotype. RESULTS: Analysis of the rpoB gene of the MDR strains revealed 10 different mutations in five codons, with rpoB codons 531 (65.2%), 526 (23.9%) and 516 (7.6%) most frequently affected. A significantly higher proportion of the rpoB S531L mutation was found among Beijing genotype strains compared with non Beijing strains (71.2% vs. 46.2%, P = 0.027). All 92 MDR isolates (100%), irrespective of their genotype, carried a mutation in codon 315 of the katG gene (S315T). However, in the INHr/RMPS control group, the S315T mutation was significantly more prevalent in the Beijing than in the non Beijing group (96.9% vs. 71.4%, P = 0.012). CONCLUSION: The high similarity of mutations supports the assumption that transmission of resistant strains is a major reason for the emergence of drug resistance in this region.
OBJECTIVE: To analyse possible associations of specific mutations conferring rifampicin (RMP) and isoniazid (INH) resistance with Beijing and non Beijing genotype strains of Mycobacterium tuberculosis from Kazakhstan. METHOD: Genotypic analysis of 92 multidrug-resistant (MDR), 50 INH but not RMP-resistant (INHr/RMPs) and 10 fully susceptible strains of M. tuberculosis from Kazakhstan was performed. In the MDR group, 59 strains (64.1%), and within the INHr/RMPs group, 32 strains (64.0%) were classified as Beijing genotype. RESULTS: Analysis of the rpoB gene of the MDR strains revealed 10 different mutations in five codons, with rpoB codons 531 (65.2%), 526 (23.9%) and 516 (7.6%) most frequently affected. A significantly higher proportion of the rpoB S531L mutation was found among Beijing genotype strains compared with non Beijing strains (71.2% vs. 46.2%, P = 0.027). All 92 MDR isolates (100%), irrespective of their genotype, carried a mutation in codon 315 of the katG gene (S315T). However, in the INHr/RMPS control group, the S315T mutation was significantly more prevalent in the Beijing than in the non Beijing group (96.9% vs. 71.4%, P = 0.012). CONCLUSION: The high similarity of mutations supports the assumption that transmission of resistant strains is a major reason for the emergence of drug resistance in this region.
Authors: Manzour Hernando Hazbón; Michael Brimacombe; Miriam Bobadilla del Valle; Magali Cavatore; Marta Inírida Guerrero; Mandira Varma-Basil; Helen Billman-Jacobe; Caroline Lavender; Janet Fyfe; Lourdes García-García; Clara Inés León; Mridula Bose; Fernando Chaves; Megan Murray; Kathleen D Eisenach; José Sifuentes-Osornio; M Donald Cave; Alfredo Ponce de León; David Alland Journal: Antimicrob Agents Chemother Date: 2006-08 Impact factor: 5.191
Authors: I Mokrousov; W W Jiao; G Z Sun; J W Liu; M Li; O Narvskaya; A D Shen Journal: Eur J Clin Microbiol Infect Dis Date: 2006-11 Impact factor: 3.267
Authors: Philip Supply; Caroline Allix; Sarah Lesjean; Mara Cardoso-Oelemann; Sabine Rüsch-Gerdes; Eve Willery; Evgueni Savine; Petra de Haas; Henk van Deutekom; Solvig Roring; Pablo Bifani; Natalia Kurepina; Barry Kreiswirth; Christophe Sola; Nalin Rastogi; Vincent Vatin; Maria Cristina Gutierrez; Maryse Fauville; Stefan Niemann; Robin Skuce; Kristin Kremer; Camille Locht; Dick van Soolingen Journal: J Clin Microbiol Date: 2006-09-27 Impact factor: 5.948
Authors: Andrea von Groll; Anandi Martin; Matthias Stehr; Mahavir Singh; Françoise Portaels; Pedro Eduardo Almeida da Silva; Juan Carlos Palomino Journal: PLoS One Date: 2010-04-16 Impact factor: 3.240