Molecular characteristics of Mycobacterium tuberculosis in the "closed" Russian town with limited population migration.

Molecular characteristics of Mycobacterium tuberculosis in the "closed" Russian town with limited population migration. Infect Genet Evol. 2020 Jan 06;:104174 Authors: Umpeleva T, Belousova K, Golubeva L, Boteva T, Morozova I, Vyazovaya A, Mokrousov I, Eremeeva N, Vakhrusheva D Abstract The aim of this study was to perform a molecular characterization of Mycobacterium tuberculosis strains circulating in one of the "closed" Russian cities under conditions of the limited population migration and high HIV coinfection rate. We analyzed 109 M. tuberculosis isolates recovered from TB patients in the Novouralsk municipality in the Ural area of Russia; 38.5% were from HIV coinfected TB patients and 19.3% patients were former prison inmates. The Beijing genotype was predominant (78.9%) while 57.8% and 17.4% of isolates belonged to the Beijing B0/W148 and Beijing 94-32-clusters, respectively. An atypical allele of the QUB26 VNTR locus (2 repeat units) was detected in 11 of 63 Beijing B0/W148 isolates. The non-Beijing isolates were subdivided into nine spoligotypes of the four genetic families (Ural, LAM, Haarlem, T), SIT35/Ural being the largest group (n = 9; 8.3%). Multidrug resistance (MDR) was detected in 63.6% and 83.7% of isolates from newly diagnosed and previously treated patients, respectively. Almost all isolates of the B0/W148-cluster were MDR (92.1%) compared to the Beijing 94-32-cluster (47.4%). No association was found between...
Source: Infection, Genetics and Evolution - Category: Genetics & Stem Cells Authors: Tags: Infect Genet Evol Source Type: research