Abstract:
BACKGROUND:Kazakhstan remains a high-burden TB prevalence country with a concomitent high-burden of multi-drug resistant tuberculosis. For this reason, we performed an in depth genetic diversity and population structure characterization of Mycobacterium tuberculosis complex (MTC) genetic diversity in Kazakhstan with both patient and community benefit. METHODS:A convenience sample of 700 MTC DNA cultures extracts from 630 tuberculosis patients recruited from 12 out of 14 regions in Kazakhstan, between 2010 and 2015, was independently studied by high-throughput hybridization-based methods, TB-SPRINT (59-Plex, n = 700), TB-SNPID (50-Plex, n = 543). DNA from 391 clinical isolates was successfully typed by two methods. To resolve the population structure of drug-resistant clades in more detail two complementary assays were run on the L2 isolates: an IS6110-NTF insertion site typing assay and a SigE SNP polymorphism assay. RESULTS:Strains belonged to L2/Beijing and L4/Euro-American sublineages; L2/Beijing prevalence totaled almost 80%. 50% of all samples were resistant to RIF and to INH., Subtyping showed that: (1) all L2/Beijing were "modern" Beijing and (2) most of these belonged to the previously described 94-32 sublineage (Central Asian/Russian), (3) at least two populations of the Central Asian/Russian sublineages are circulating in Kazakhstan, with different evolutionary dynamics. CONCLUSIONS:For the first time, the global genetic diversity and population structure of M. tuberculosis genotypes circulating in Kazakhstan was obtained and compared to previous local studies. Results suggest a region-specific spread of a very limited number of L2/Beijing clonal complexes in Kazakhstan many strongly associated with an MDR phenotype.
journal_name
BMC Infect Disjournal_title
BMC infectious diseasesauthors
Klotoe BJ,Kacimi S,Costa-Conceicão E,Gomes HM,Barcellos RB,Panaiotov S,Haj Slimene D,Sikhayeva N,Sengstake S,Schuitema AR,Akhalaia M,Alenova A,Zholdybayeva E,Tarlykov P,Anthony R,Refrégier G,Sola Cdoi
10.1186/s12879-019-4201-2subject
Has Abstractpub_date
2019-06-24 00:00:00pages
553issue
1issn
1471-2334pii
10.1186/s12879-019-4201-2journal_volume
19pub_type
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