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Extremely lethal and hypervirulent Mycobacterium tuberculosis strain cluster emerging in Far East, Russia

Mycobacterium tuberculosis strains of the early ancient sublineage of the Beijing genotype are mostly drug susceptible and mainly circulate in East Asia. We have recently discovered two clusters of this sublineage emerging in the Asian part of Russia (VNTR-defined 1071-32 and 14717-15 types) and, to...

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Published in:Emerging microbes & infections 2021-01, Vol.10 (1), p.1691-1701
Main Authors: Vinogradova, Tatiana, Dogonadze, Marine, Zabolotnykh, Natalia, Badleeva, Maria, Yarusova, Irina, Vyazovaya, Anna, Gerasimova, Alena, Zhdanova, Svetlana, Vitovskaya, Maria, Solovieva, Natalia, Pasechnik, Oksana, Ogarkov, Oleg, Mokrousov, Igor
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creator Vinogradova, Tatiana
Dogonadze, Marine
Zabolotnykh, Natalia
Badleeva, Maria
Yarusova, Irina
Vyazovaya, Anna
Gerasimova, Alena
Zhdanova, Svetlana
Vitovskaya, Maria
Solovieva, Natalia
Pasechnik, Oksana
Ogarkov, Oleg
Mokrousov, Igor
description Mycobacterium tuberculosis strains of the early ancient sublineage of the Beijing genotype are mostly drug susceptible and mainly circulate in East Asia. We have recently discovered two clusters of this sublineage emerging in the Asian part of Russia (VNTR-defined 1071-32 and 14717-15 types) and, to our surprise, both were strongly MDR/XDR-associated. Here, we evaluated their pathogenic features. The clinical isolates and reference laboratory strain H37Rv were investigated in the C57BL/6 mouse model to assess their virulence and lethality properties. The BACTEC MGIT 960 system was used to study the in vitro growth characteristics. In the murine model, strains 396 (14717-15-cluster, from Buryatia, Far East) and 6691 (1071-32-cluster, from Omsk, Siberia) demonstrated contrasting properties. The 396-infected group had significantly higher mortality, more weight loss, higher bacterial burden, and more severe lung pathology. Furthermore, compared to the previously published data on other Russian epidemic Beijing strains (B0/W148, CAO, Central Asian Russian), strain 396 demonstrated the highest mortality. Under the in vitro growth experiment, cluster 14717-15 isolates had significantly shorter lag-phase. To conclude, low-virulent MDR strain 6691 belongs to the Beijing 1071-32-cluster widespread across FSU countries but at low prevalence. This corresponds to common expectation that multiple drug resistance mutations reduce fitness and virulence. In contrast, highly lethal and hypervirulent MDR strain 396 represents an intriguing Beijing 14717-15 cluster predominant only in Buryatia, Far East (16%), sporadically found beyond it, but not forming clusters of transmission. Further in-depth study of this most virulent Russian Beijing cluster is warranted.
doi_str_mv 10.1080/22221751.2021.1967704
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infections</jtitle><addtitle>Emerg Microbes Infect</addtitle><date>2021-01-01</date><risdate>2021</risdate><volume>10</volume><issue>1</issue><spage>1691</spage><epage>1701</epage><pages>1691-1701</pages><issn>2222-1751</issn><eissn>2222-1751</eissn><notes>ObjectType-Article-1</notes><notes>SourceType-Scholarly Journals-1</notes><notes>ObjectType-Feature-2</notes><notes>content type line 23</notes><notes>Supplemental data for this article can be accessed at https://doi.org/10.1080/22221751.2021.1967704.</notes><abstract>Mycobacterium tuberculosis strains of the early ancient sublineage of the Beijing genotype are mostly drug susceptible and mainly circulate in East Asia. We have recently discovered two clusters of this sublineage emerging in the Asian part of Russia (VNTR-defined 1071-32 and 14717-15 types) and, to our surprise, both were strongly MDR/XDR-associated. Here, we evaluated their pathogenic features. The clinical isolates and reference laboratory strain H37Rv were investigated in the C57BL/6 mouse model to assess their virulence and lethality properties. The BACTEC MGIT 960 system was used to study the in vitro growth characteristics. In the murine model, strains 396 (14717-15-cluster, from Buryatia, Far East) and 6691 (1071-32-cluster, from Omsk, Siberia) demonstrated contrasting properties. The 396-infected group had significantly higher mortality, more weight loss, higher bacterial burden, and more severe lung pathology. Furthermore, compared to the previously published data on other Russian epidemic Beijing strains (B0/W148, CAO, Central Asian Russian), strain 396 demonstrated the highest mortality. Under the in vitro growth experiment, cluster 14717-15 isolates had significantly shorter lag-phase. To conclude, low-virulent MDR strain 6691 belongs to the Beijing 1071-32-cluster widespread across FSU countries but at low prevalence. This corresponds to common expectation that multiple drug resistance mutations reduce fitness and virulence. In contrast, highly lethal and hypervirulent MDR strain 396 represents an intriguing Beijing 14717-15 cluster predominant only in Buryatia, Far East (16%), sporadically found beyond it, but not forming clusters of transmission. Further in-depth study of this most virulent Russian Beijing cluster is warranted.</abstract><cop>United States</cop><pub>Taylor &amp; Francis</pub><pmid>34380361</pmid><doi>10.1080/22221751.2021.1967704</doi><tpages>11</tpages><orcidid>https://orcid.org/0000-0001-5924-0576</orcidid><oa>free_for_read</oa></addata></record>
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source Taylor & Francis Open Access Journals; PubMed Central
subjects Animals
Antitubercular Agents - pharmacology
Beijing
Beijing genotype
Disease Models, Animal
DNA, Bacterial - genetics
Drug Resistance, Multiple, Bacterial
epidemic
Epidemics
Genotype
Male
Mice
Mice, Inbred C57BL
Microbial Sensitivity Tests
mouse model
Mycobacterium tuberculosis
Mycobacterium tuberculosis - drug effects
Mycobacterium tuberculosis - genetics
Mycobacterium tuberculosis - pathogenicity
Original
Russia - epidemiology
Tuberculosis, Multidrug-Resistant - epidemiology
Tuberculosis, Multidrug-Resistant - mortality
Virulence
title Extremely lethal and hypervirulent Mycobacterium tuberculosis strain cluster emerging in Far East, Russia
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