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Prevalence of different HIV-1 subtypes in sexual transmission in China: a systematic review and meta-analysis.

ABSTRACT: Sexual transmission has become the primary route of HIV transmission in China. Therefore, a comprehensive overview of HIV-1 subtype distribution is necessary for the prevention and control of the HIV epidemic. The present study aimed to provide a comprehensive prevalence estimate of different HIV-1 subtypes in sexual transmission in China. We conducted a systematic literature review for studies of HIV-1 subtypes in English and Chinese through several databases. Eligible articles were screened and selected by two authors independently. Random-effects model were applied to calculate the pooled prevalence of different HIV-1 subtypes, and subgroup analyses examined prevalence estimates across time, locations, and populations. A total of 130 eligible studies were identified, including 18 752 successfully genotyped samples. The pooled prevalence of CRF01_AE, subtype B, CRF07_BC, CRF08_BC, and subtype C were 44·54% (95% CI 40·81-48·30), 18·31% (95% CI 14·71-22·17), 16·45% (95% CI 13·82-19·25), 2·55% (95% CI 1·56-3·73), 0·37% (95% CI 0·11-0·72), respectively. The prevalence of subtype B in sexual transmission decreased, while the prevalence of CRF01_AE and CRF07_BC in sexual transmission, and CRF08_BC in heterosexual transmission increased. There is significant variation in HIV-1 subtype distribution between regions. The distribution of HIV-1 subtypes and circulating recombinant forms have changed significantly. The high genetic variability of HIV-1 poses a significant challenge for disease control and surveillance in China.

SUBMITTER: Yuan R

PROVIDER: S-EPMC9150594 | biostudies-literature | 2016 Jul

REPOSITORIES: biostudies-literature

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Prevalence of different HIV-1 subtypes in sexual transmission in China: a systematic review and meta-analysis.

Yuan R R Cheng H H Chen L-S LS Zhang X X Wang B B

Epidemiology and infection 20160219 10

Sexual transmission has become the primary route of HIV transmission in China. Therefore, a comprehensive overview of HIV-1 subtype distribution is necessary for the prevention and control of the HIV epidemic. The present study aimed to provide a comprehensive prevalence estimate of different HIV-1 subtypes in sexual transmission in China. We conducted a systematic literature review for studies of HIV-1 subtypes in English and Chinese through several databases. Eligible articles were screened an ...[more]

PMID: 26892485

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Project description:BackgroundApproximately 2.4 million people are living with HIV in India. This large disease burden, and potential for epidemic spread in some areas, demands a full understanding of transmission in that country. We wished to quantify the effects of key sexual risk factors for HIV infection for each gender and among high- and low-HIV risk populations in India.MethodologyWe conducted a systematic review of sexual risk factors for HIV infection from 35 published studies. Risk factors analyzed were: male circumcision/religion, Herpes Simplex Virus 2, syphilis, gonorrhoea, genital ulcer, multiple sexual partners and commercial sex. Studies were included if they met predetermined criteria. Data were extracted and checked by two researchers and random-effects meta analysis of effects was conducted. Heterogeneity in effect estimates was examined by I(2) statistic. Publication bias was tested by Begg's test and funnel plots. Meta regression was used to assess effect modification by various study attributes.ResultsAll risk factors were significantly associated with HIV status. The factor most strongly associated with HIV for both sexes was HSV-2 infection (OR(men): 5.87; 95%CI: 2.46-14.03; OR(women): 6.44; 95%CI: 3.22-12.86). The effect of multiple sexual partners was similar among men (OR = 2.46; 95%CI: 1.91-3.17,) and women (OR = 2.02; 95%CI: 1.43-2.87) and when further stratified by HIV-risk group. The association between HSV-2 and HIV prevalence was consistently stronger than other STIs or self-reported genital ulcer. If the strong associations between HSV-2 and HIV were interpreted causally, these results implied that approximately half of the HIV infections observed in our study population were attributable to HSV-2 infection.ConclusionsThe risk factors examined in our analysis should remain targets of HIV prevention programs. Our results confirm that sexual risk factors for HIV infection continue to be an important part of Indian HIV epidemic 26 years after it began.

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Project description:BackgroundWorkplace sexual violence is a significant public health problem in low and middle-income countries, including Ethiopia. However, except for individual studies with varying prevalence rates in different occupations, there are no national prevalence studies conducted in workplace settings in Ethiopia. Appropriate estimation of the problem is essential to formulate health service plans most fitted for workplaces. Hence, this review and meta-analysis intended to estimate the national pooled prevalence of workplace sexual violence in Ethiopia.MethodsThe databases used were; PubMed, Google Scholar, CINAHL, and African Journals Online. For a critical appraisal of the papers, we used the Joanna Briggs Institute Meta-Analysis of Statistics Assessment and Review Instrument for cross-sectional studies. The meta-analysis was conducted using comprehensive meta-analysis and MetaXL software. Descriptive information of studies was presented in narrative form, and quantitative results were presented in forest plots. The Cochran Q test and I2 test statistics were employed to test heterogeneity across studies. A random-effect model computed the pooled estimate prevalence with 95% confidence intervals.ResultsThe pooled prevalence of workplace sexual violence was 22% (95% CI 17%, 28%). The pooled prevalence was 14.1% (95% CI 10.4%, 18.9%) for attempted rape, 8% (95% CI 5.7%, 11.1%) for rape, and 33.2% (95% CI 24.1%, 43.7%) for sexual harassment. The pooled prevalence was the highest among female university staffs 49% (95% CI 45%, 56%), and among commercial sex workers 28% (95% CI 3%, 59%).ConclusionsThis analysis revealed that the prevalence of sexual violence and sexual harassment in Ethiopian workplaces is high. It was also exceptionally high among female faculty staff, commercial sex workers, and workplaces in Tigray National regional state. Thus, concerned stakeholders must design and implement effective interventions to prevent workplace sexual violence in workplaces in Ethiopia and provide necessary support and care to the victims.

Project description:BackgroundThe risk of sexual transmission of HIV from individuals with low-level HIV viraemia receiving antiretroviral therapy (ART) has important public health implications, especially in resource-limited settings that use alternatives to plasma-based viral load testing. This Article summarises the evidence related to sexual transmission of HIV at varying HIV viral load levels to inform messaging for people living with HIV, their partners, their health-care providers, and the wider public.MethodsWe conducted a systematic review and searched PubMed, MEDLINE, Cochrane Central Register of Controlled Trials, Embase, Conference Proceedings Citation Index-Science, and WHO Global Index Medicus, for work published from Jan 1, 2010 to Nov 17, 2022. Studies were included if they pertained to sexual transmission between serodiscordant couples at various levels of viraemia, the science behind undetectable=untransmittable, or the public health impact of low-level viraemia. Studies were excluded if they did not specify viral load thresholds or a definition for low-level viraemia or did not provide quantitative viral load information for transmission outcomes. Reviews, non-research letters, commentaries, and editorials were excluded. Risk of bias was evaluated using the ROBINS-I framework. Data were extracted and summarised with a focus on HIV sexual transmission at varying HIV viral loads.Findings244 studies were identified and eight were included in the analysis, comprising 7762 serodiscordant couples across 25 countries. The certainty of evidence was moderate; the risk of bias was low. Three studies showed no HIV transmission when the partner living with HIV had a viral load less than 200 copies per mL. Across the remaining four prospective studies, there were 323 transmission events; none were in patients considered stably suppressed on ART. Among all studies there were two cases of transmission when the index patient's (ie, patient with previously diagnosed HIV infection) most recent viral load was less than 1000 copies per mL. However, interpretation of both cases was complicated by long intervals (ie, 50 days and 53 days) between the transmission date and the most recent index viral load result.InterpretationThere is almost zero risk of sexual transmission of HIV with viral loads of less than 1000 copies per mL. These data provide a powerful opportunity to destigmatise HIV and promote adherence to ART through dissemination of this positive public health message. These findings can also promote access to viral load testing in resource-limited settings for all people living with HIV by facilitating uptake of alternative sample types and technologies.FundingBill & Melinda Gates Foundation.

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Prevalence of different HIV-1 subtypes in sexual transmission in China: a systematic review and meta-analysis.

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Prevalence of different HIV-1 subtypes in sexual transmission in China: a systematic review and meta-analysis.

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