scholarly journals The effectiveness of tenofovir-based pre-exposure prophylaxis for prevention of HIV acquisition among sub-Saharan African women at high risk: a systematic review

2021 ◽  
Vol 38 ◽  
Author(s):  
Grant Murewanhema ◽  
Moffat Malisheni ◽  
Noah Fongwen Takah
Keyword(s):  
Systematic Review ◽  
High Risk ◽  
African Women ◽  
Sub Saharan ◽  
Hiv Acquisition ◽  
Exposure Prophylaxis ◽  
Prevention Of Hiv

scholarly journals The effectiveness of tenofovir-based pre-exposure prophylaxis for prevention of HIV acquisition among Sub-Saharan African women at high risk: a systematic review

2021 ◽  
Author(s):  
Grant Murewanhema ◽  
Moffat Malisheni ◽  
Noah Fongwen Takah
Keyword(s):  
Systematic Review ◽  
At Risk ◽  
High Risk ◽  
Hiv Infection ◽  
Current Evidence ◽  
High Risk Population ◽  
Risk Population ◽  
Vaginal Gel ◽  
Sub Saharan ◽  
Exposure Prophylaxis

Abstract Background Women in Sub-Saharan Africa (SSA) are disproportionately affected by the HIV epidemic. In 2019, they constituted 59% of new infections; thus, they remain a key population for control. Public health interventions to prevent acquisition of HIV in this high-risk population are urgently needed. Tenofovir-based pre-exposure prophylaxis (TFV-PrEP) has been shown to reduce HIV infections in other key populations. However, comprehensive evidence regarding TFV-PrEP effectiveness in women living in SSA has not been determined. Therefore, we undertook a systematic review to determine the effectiveness of tenofovir-1% (TFV-1%) vaginal gel, oral tenofovir (TFV) and tenofovir-emtricitabine (TDF-FTC) pre-exposure prophylaxis for primary acquisition of HIV in at-risk women living in SSA.Methods OVID MEDLINE, EMBASE, CENTRAL, Web of Science and Clinical Trials.gov were searched for eligible studies from 01 January 2020 to 31 July 2020. Only randomised controlled trials (RCTs) conducted in women living in SSA were included. Measures of effectiveness (hazard ratios (HR), incidence rate ratios (IRR)) were extracted from individual studies to determine the effectiveness of TFV-PrEP in preventing HIV infection among at-risk women living in SSA.Results From 2002 non-duplicate articles, four RCTs evaluating the effectiveness of one or more of the interventions against placebos were included. TFV-1% vaginal gel, oral TDF or TDF-FTC were not effective in preventing the acquisition of HIV infection in women living in SSA. However, poor adherence by study participants could have confounded the true effectiveness of TFV-PrEP in this high risk population. Meta-analysis was not conducted given the limited number of eligible studies identified from the search.Conclusion The current evidence does not support the effectiveness of TFV-PrEP for HIV in SSA women. More studies aimed at addressing factors driving low adherence to HIV interventions in this high risk population are urgently needed in order to improve the design of future RCTs leading to the determination of more reliable estimates of TFV-1% vaginal gel or oral TDF or TDF-FTC effectiveness.Protocol registration: This systematic review was not registered in PROSPERO.

scholarly journals Effect of syphilis infection on HIV acquisition: a systematic review and meta-analysis

2020 ◽  
pp. sextrans-2020-054706
Author(s):  
Meng Yin Wu ◽  
Hui Zi Gong ◽  
Kui Ru Hu ◽  
He-yi Zheng ◽  
Xia Wan ◽  
...  
Keyword(s):  
Systematic Review ◽  
Relative Risk ◽  
High Risk ◽  
Meta Analysis ◽  
Risk Groups ◽  
Hiv Incidence ◽  
Syphilis Infection ◽  
High Risk Populations ◽  
Hiv Acquisition ◽  
Risk Of Hiv Acquisition

ObjectivesCo-infection of syphilis and HIV remains hard to manage and its morbidity shows a rising tendency. Syphilis has been associated with increased risk of HIV acquisition in high-risk groups, especially in men who have sex with men (MSM). This systematic review and meta-analysis estimates the effect of syphilis infection on subsequent HIV acquisition, and assesses its difference between MSM and other high-risk populations.MethodsFive electronic databases were searched for literature published to 21 September 2019 without language restrictions. Longitudinal studies that enrolled key populations to compare the incidence of HIV with and without syphilis exposure were included. We used a random-effects model to estimate the effect of syphilis infection on HIV acquisition among high-risk populations, which include MSM, sex workers, serodiscordant couples, people who inject drugs and attendees of STD clinics.ResultsA total of 17 cohorts and 5 case-control studies involving 65 232 participants were included. HIV incidence showed a two-time increase after syphilis exposure, compared with a control group (relative risk (RR) 2.67 (95% CI 2.05 to 3.47); p<0.05 for prevalence; RR 3.21 (95% CI 2.26 to 4.57); p=0.419 for incidence). No significant differences were observed between MSM and other high-risk groups in syphilis infection prevalence (RR 2.60 (95% CI 1.78 to 3.80); p<0.05 vs RR, 2.98 (95% CI 2.15 to 4.14); p<0.05; ratio of relative risk 0.76 (95% CI 0.49 to 1.17)).ConclusionsSyphilis infection increases the risk of HIV acquisition in high-risk populations. There is no evidence to suggest MSM are at greater risk than other high-risk populations. Prompt diagnosis, timely treatment, preventive interventions against syphilis infection would be a worthwhile investment for reducing HIV incidence. Strategies to combat stigma and discrimination targeted at MSM are pragmatically needed.

scholarly journals Challenges and potential barriers to the uptake of antiretroviral-based prevention in Asia and the Pacific region

Sexual Health ◽  
2014 ◽  
Vol 11 (2) ◽  
pp. 126 ◽  
Author(s):  
Ying-Ru Lo ◽  
Masaya Kato ◽  
Nittaya Phanuphak ◽  
Masami Fujita ◽  
Duong Bui Duc ◽  
...  
Keyword(s):  
Hiv Transmission ◽  
Sub Saharan Africa ◽  
Treatment As Prevention ◽  
The Pacific ◽  
Prep Implementation ◽  
Sub Saharan ◽  
Hiv Acquisition ◽  
Operational Issues ◽  
Exposure Prophylaxis ◽  
Firm Evidence

Evidence has emerged over the past few years on the effectiveness of antiretroviral-based prevention technologies to prevent (i) HIV transmission while decreasing morbidity and mortality in HIV-infected persons, and (ii) HIV acquisition in HIV-uninfected individuals through pre-exposure prophylaxis (PrEP). Only few of the planned studies on treatment as prevention (TasP) are conducted in Asia. TasP might be more feasible and effective in concentrated rather than in generalised epidemics, as resources for HIV testing and antiretroviral treatment could focus on confined and much smaller populations than in the generalised epidemics observed in sub-Saharan Africa. Several countries such as Cambodia, China, Thailand and Vietnam, are now paving the way to success. Similar challenges arise for both TasP and PrEP. However, the operational issues for PrEP are amplified by the need for frequent retesting and ensuring adherence. This paper describes challenges for the implementation of antiretroviral-based prevention and makes the case that TasP and PrEP implementation research in Asia is much needed to provide insights into the feasibility of these interventions in populations where firm evidence of ‘real world’ effectiveness is still lacking.

scholarly journals Diaphragm and lubricant gel for prevention of HIV acquisition in southern African women: a randomised controlled trial

The Lancet ◽  
2007 ◽  
Vol 370 (9583) ◽  
pp. 251-261 ◽  
Author(s):  
Nancy S Padian ◽  
Ariane van der Straten ◽  
Gita Ramjee ◽  
Tsungai Chipato ◽  
Guy de Bruyn ◽  
...  
Keyword(s):  
Randomised Controlled Trial ◽  
Controlled Trial ◽  
African Women ◽  
Hiv Acquisition ◽  
Randomised Controlled ◽  
Prevention Of Hiv

scholarly journals “I wish to remain HIV negative”: Pre-exposure prophylaxis adherence and persistence in transgender women and men who have sex with men in coastal Kenya

PLoS ONE ◽  
2021 ◽  
Vol 16 (1) ◽  
pp. e0244226
Author(s):  
Makobu Kimani ◽  
Elise M. van der Elst ◽  
Oscar Chirro ◽  
Elizabeth Wahome ◽  
Fauz Ibrahim ◽  
...  
Keyword(s):  
Risk Behaviour ◽  
Healthcare Services ◽  
Transgender Women ◽  
Situational Factors ◽  
Sub Saharan Africa ◽  
Sexual Risk Behaviour ◽  
Sub Saharan ◽  
Sex With Men ◽  
Hiv Acquisition ◽  
Exposure Prophylaxis

Background Transgender women (TGW) and men who have sex with men (MSM) in sub-Saharan Africa have high HIV acquisition risks and can benefit from daily pre-exposure prophylaxis (PrEP). We assessed PrEP adherence by measuring tenofovir-diphosphate (TFV-DP) levels and explore motives for PrEP persistence in TGW and MSM. Methods Participants were enrolled in a one-year PrEP programme and made quarterly visits irrespective of whether they were still using PrEP. At their month 6 visit, participants provided a dried blood spot to test for TFV-DP levels; protective levels were defined as those compatible with ≥4 pills per week (700–1249 fmol/punch). Before TFV-DP levels were available, a sub-set of these participants were invited for an in-depth interview (IDI). Semi-structured IDI topic guides were used to explore motives to uptake, adhere to, and discontinue PrEP. IDI data were analyzed thematically. Results Fifty-three participants (42 MSM and 11 TGW) were enrolled. At month 6, 11 (20.7%) participants (8 MSM and 3 TGW) were lost to follow up or stopped taking PrEP. Any TFV-DP was detected in 62.5% (5/8) of TGW vs. 14.7% of MSM (5/34, p = 0.01). Protective levels were detected in 37.5% of TGW (3/8), but not in any MSM. Nineteen IDI were conducted with 7 TGW and 9 MSM on PrEP, and 1 TGW and 2 MSM off PrEP. Unplanned or frequent risky sexual risk behaviour were the main motives for PrEP uptake. Among participants on PrEP, TGW had a more complete understanding of the benefits of PrEP. Inconsistent PrEP use was attributed to situational factors. Motives to discontinue PrEP included negative reactions from partners and stigmatizing healthcare services. Conclusion While MSM evinced greater adherence challenges in this PrEP programme, almost 40% of TGW were protected by PrEP. Given high HIV incidences in TGW these findings hold promise for TGW PrEP programming in the region.

scholarly journals A Web-Based Study of HIV Prevention in the Era of Pre-Exposure Prophylaxis Among Vulnerable HIV-Negative Gay and Bisexual Men, Transmen, and Transwomen Who Have Sex With Men: Protocol for an Observational Cohort Study (Preprint)

2019 ◽  
Author(s):  
Denis Nash ◽  
Matthew Stief ◽  
Caitlin MacCrate ◽  
Chloe Mirzayi ◽  
Viraj V Patel ◽  
...  
Keyword(s):  
High Risk ◽  
Hiv Prevention ◽  
Hiv Testing ◽  
The United States ◽  
Racially Diverse ◽  
Web Based ◽  
Sex With Men ◽  
Hiv Acquisition ◽  
Exposure Prophylaxis ◽  
Hiv Negative

BACKGROUND Gay, bisexual, and other men who have sex with men continue to bear a large burden of the HIV epidemic in the United States and are among the only populations with increasing incidence in recent years. OBJECTIVE The Together 5000 (T5K) Study aimed to enroll a US-based, racially diverse sample of HIV-negative men, transmen, and transwomen who are not on pre-exposure prophylaxis (PrEP) into an observational cohort to inform the design, implementation, scale-up, and evaluation of HIV prevention programs. METHODS We used internet-based strategies to enroll a large, racially diverse national sample of HIV-negative men, transmen, and transwomen aged 16 to 49 years at high risk of HIV acquisition via sexual networking apps. Study participants are contacted every 6 months (in between annual surveys) for a brief survey on HIV testing, HIV diagnosis, and PrEP use (ie, attempts to access, PrEP initiation, and PrEP discontinuation). Participants complete annual self-administered at-home HIV testing and Web-based surveys. Using baseline serologic data and self-reported HIV testing history, we reconstructed a cohort of persons who were HIV negative at 12 months before baseline to estimate HIV incidence leading up to cohort enrollment. RESULTS The study sample included 8777 participants from all 50 US states, Puerto Rico, and Guam; 50.91% (4468/8777) were persons of color and 25.30% (2221/8777) were young individuals aged 16 to 24 years. Per eligibility criteria, all T5K participants reported having sex with >2 male partners in the 90 days before enrollment, self-reported not having been diagnosed with HIV, and were not actively taking PrEP. In addition, 79.39% (6968/8777) reported >2 insertive condomless anal sex (CAS) acts, 61.02% (5356/8777) reported >1 receptive CAS acts in the past 90 days. Furthermore, most (7525/8777, 85.74%) reported never having taken PrEP. In total, 70.25% (6166/8777) were sent a self-administered at-home HIV test kit and 82.29% (5074/6166) of those sent a kit returned a sample for testing. The HIV incidence rate during the 12-month period leading up to enrollment was estimated to be 2.41 (95% CI 2.02-2.90) per 100 person-years. CONCLUSIONS A large, national, and racially diverse fully Web-based cohort of HIV-negative men, transmen, and transwomen at high risk for HIV seroconversion has successfully been recruited into longitudinal follow-up. This cohort is at high risk for HIV acquisition and can provide important insights related to the real-world uptake, impact, and equity of HIV prevention interventions in the United States. Participants can be invited to participate in trials aimed at testing strategies to improve the uptake of and engagement in these interventions. INTERNATIONAL REGISTERED REPORT RR1-10.2196/13715

HIV Transmission Prevention

2017 ◽  
Author(s):  
Carolyn Chu ◽  
Christopher M. Bositis
Keyword(s):  
Hiv Transmission ◽  
Hiv Infections ◽  
Risk Groups ◽  
Antiviral Drugs ◽  
Antiretroviral Drugs ◽  
Post Exposure Prophylaxis ◽  
Needle Exchange Programs ◽  
Hiv Acquisition ◽  
Exposure Prophylaxis ◽  
Prevention Of Hiv

The prevention of HIV transmission involves a number of behavioral, structural, and biomedical interventions. Behavioral methods include education about sexual health, drug use, and risk reduction, as well as specific messages for at-risk populations who are HIV positive. Needle exchange programs and consistent use of condoms have proven effective for prevention of HIV infection. Post-exposure prophylaxis against HIV with antiviral drugs is often recommended in occupational health care and non-occupational settings. Voluntary male circumcision also reduces the risk of HIV acquisition. The treatment of pregnant women who are HIV infected can effectively eliminate mother-to-child transmission of the virus. Recently, the use of antiretroviral drugs for pre-exposure prophylaxis has proven highly effective in preventing HIV infections in high-risk groups including men who have sex with men. Promising therapies that likely will be available in the future include injectable antiviral drugs, vaginal microbicides, and HIV vaccines.

High uptake of pre-exposure prophylaxis (PrEP) during early roll-out in Belgium: results from surveillance reports

Sexual Health ◽  
2019 ◽  
Vol 16 (1) ◽  
pp. 80 ◽  
Author(s):  
Bea Vuylsteke ◽  
Thijs Reyniers ◽  
Catherine Lucet ◽  
Christiana Nöstlinger ◽  
Jessika Deblonde ◽  
...  
Keyword(s):  
Disability Insurance ◽  
Aggregated Data ◽  
Increased Risk ◽  
Event Driven ◽  
Sub Saharan ◽  
Sex With Men ◽  
Hiv Acquisition ◽  
Risk Of Hiv Acquisition ◽  
Exposure Prophylaxis ◽  
Roll Out

Background Since 1 June 2017, oral pre-exposure prophylaxis (PrEP) could be prescribed and reimbursed in Belgium as prophylactic medication for people who are at increased risk of HIV acquisition. The aim of this study was to determine the uptake of daily and event-driven PrEP in Belgium during the first 9 months of roll-out. Methods: Routine aggregated data on the number of reimbursement requests and the number of boxes of Truvada (Gilead Sciences, Cambridge, UK) delivered for PrEP through the Belgian pharmacies were obtained from the National Institute for Health and Disability Insurance. We also collected aggregated data from seven Aids Reference Centres (ARCs) currently providing most of the PrEP care in Belgium. Results: From 1 June 2017 to 28 February 2018, 1352 requests for reimbursement were approved by the National Institute for Health and Disability Insurance. Almost 98% of those who bought at least one box of 30 tablets of emtricitabine 200mg/tenofovir disoproxil fumarate 300mg (FTC/TDF) in a Belgian pharmacy were male, and most (67%) were between 30 and 50 years of age. According to data obtained from ARCs, the proportion of those choosing event-driven PrEP initially ranged between 29% and 73%. Conclusions: The uptake of PrEP in Belgium since the start of the roll-out in June 2017 has been high, and almost entirely limited to men who have sex with men, of whom 43% initially prefer a non-daily regimen. A better understanding is needed as to why other populations, such as sub-Saharan African migrants, are not accessing PrEP, as well as the development of a more sustainable PrEP delivery model.

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