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Journal Article > Research

Second-line drug-resistant TB and associated risk factors in Karakalpakstan, Uzbekistan

Moe S, Azamat I, Allamuratova S, Oluya M, Khristusev A, Rekart M, Mamitova K, Bidwell G, Gomez-Restrepo C, Kalmuratov B, Tigay Z, Parpieva N, Safaev K, Sitali N, Gomez D, Mikhail A, Sinha A
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Abstract

BACKGROUND

Drug-resistant TB (DR-TB) remains a major public health threat. In 2022, Uzbekistan reported 2,117 cases of DR-TB, with 69% tested for fluoroquinolone resistance. Limited information is available on the prevalence of resistance to bedaquiline, linezolid, and fluoroquinolone, which are key components of the all-oral treatment regimen for rifampicin-resistant TB in Uzbekistan.


METHODS

A retrospective study was conducted using extensive programmatic data from 2019 to 2023 in Uzbekistan. We assessed second-line drug-resistant TB (SLDR-TB) rates using phenotypic drug susceptibility testing (pDST). Demographic and clinical characteristics associated with SLDR-TB were analysed using multivariable logistic regression models based on the Allen-Cady approach.


RESULTS 

In total, 2,405 patients with TB who had undergone pDST were included (median age 40 years, 47% female). The overall SLDR-TB resistance rate was 24% (95% CI 22-26). Prevalence of resistance to bedaquiline, linezolid, moxifloxacin, levofloxacin, and amikacin were respectively 3.1%, 0.8%, 15%, 13%, and 12%. Risk factors for SLDR-TB were resistance to rifampicin and/or isoniazid, exposure to clofazimine, retreatment status, contact with drug-susceptible TB case or DR-TB case, and diabetes.


CONCLUSIONS

The high prevalence of SLDR-TB is of major concern, emphasising the need for baseline pDST in RR-TB treatment. Identified risk factors can aid early detection of at-risk individuals and inform clinical practice.

Countries
Uzbekistan
Subject Area
tuberculosisantimicrobial resistance
DOI
10.5588/ijtldopen.24.0351
Published Date
01-Sep-2024
PubMed ID
39301133
Languages
English
Journal
IJTLD OPEN
Volume / Issue / Pages
Volume 1, Issue 9, Pages 391-397
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