» Articles » PMID: 39459966

Patterns of HIV-1 Drug Resistance Observed Through Geospatial Analysis of Routine Diagnostic Testing in KwaZulu-Natal, South Africa

Abstract

HIV-1 drug resistance (HIVDR) impedes treatment and control of HIV-1, especially in high-prevalence settings such as KwaZulu-Natal (KZN) province, South Africa. This study merged routine HIV-1 genotypic resistance test (GRT) data with Geographic Information Systems coordinates to assess patterns and geographic distribution of HIVDR in KZN, among ART-experienced adults with virological failure. We curated 3133 GRT records generated between 1 January 2018 and 30 June 2022, which includes the early phase of dolutegravir (DTG) rollout, of which 2735 (87.30%) had HIVDR. Of the 2735, major protease, nucleoside, and non-nucleoside reverse transcriptase inhibitor mutations were detected in 41.24%, 84.97% and 88.08% of GRTs, respectively. Additional genotyping of HIV-1 for 41/3133 (1.31%) GRTs showed that 17/41 (41.46%) had integrase strand transfer inhibitor resistance. Notably, of 26 patients on DTG with genotyping, 9 (34.62%) had DTG-associated resistance mutations. Dual- or triple-class resistance was observed in four of every five GRTs. The odds of HIVDR increased significantly with age, with ≥60 years having 5 times higher odds of HIVDR compared to 18-29 years ( = 0.001). We identified geospatial differences in the burden of HIVDR, providing proof of concept that this could be used for data-driven public health decision making. Ongoing real-time HIVDR surveillance is essential for evaluating the outcomes of the updated South African HIV treatment programme.

References
1.
Li J, Stella N, Choudhary M, Javed A, Rodriguez K, Ribaudo H . Impact of pre-existing drug resistance on risk of virological failure in South Africa. J Antimicrob Chemother. 2021; 76(6):1558-1563. PMC: 8599859. DOI: 10.1093/jac/dkab062. View

2.
Peterson M, Gandhi N, Clennon J, Nelson K, Morris N, Ismail N . Extensively drug-resistant tuberculosis 'hotspots' and sociodemographic associations in Durban, South Africa. Int J Tuberc Lung Dis. 2019; 23(6):720-727. PMC: 6641858. DOI: 10.5588/ijtld.18.0575. View

3.
Loosli T, Hossmann S, Ingle S, Okhai H, Kusejko K, Mouton J . HIV-1 drug resistance in people on dolutegravir-based antiretroviral therapy: a collaborative cohort analysis. Lancet HIV. 2023; 10(11):e733-e741. PMC: 10913014. DOI: 10.1016/S2352-3018(23)00228-X. View

4.
Sy K, Leavitt S, De Vos M, Dolby T, Bor J, Horsburgh Jr C . Spatial heterogeneity of extensively drug resistant-tuberculosis in Western Cape Province, South Africa. Sci Rep. 2022; 12(1):10844. PMC: 9237070. DOI: 10.1038/s41598-022-14581-4. View

5.
McLaren Z, Ardington C, Leibbrandt M . Distance decay and persistent health care disparities in South Africa. BMC Health Serv Res. 2014; 14:541. PMC: 4236491. DOI: 10.1186/s12913-014-0541-1. View