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Silhol R, Maheu-Giroux M, Soni N, Fotso AS, Rouveau N, Vautier A, Doumenc-Aïdara C, Geoffroy O, N’Guessan KN, Sidibé Y, Kabemba OK, Gueye PA, Ndeye PD, Mukandavire C, Vickerman P, Keita A, Ndour CT, Ehui E, Larmarange J, Boily MC. The impact of past HIV interventions and diagnosis gaps on new HIV acquisitions, transmissions, and HIV-related deaths in Côte d'Ivoire, Mali, and Senegal. AIDS 2024; 38:1783-1793. [PMID: 38953898 PMCID: PMC11356671 DOI: 10.1097/qad.0000000000003974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Revised: 05/28/2024] [Accepted: 06/06/2024] [Indexed: 07/04/2024]
Abstract
OBJECTIVES To estimate the epidemiological impact of past HIV interventions and the magnitude and contribution of undiagnosed HIV among different risk groups on new HIV acquisitions in Côte d'Ivoire, Mali and Senegal. DESIGN HIV transmission dynamic models among the overall population and key populations [female sex workers (FSW), their clients, and MSM]. METHODS Models were independently parameterized and calibrated for each set of country-specific demographic, behavioural, and epidemiological data. We estimated the fraction of new HIV infections over 2012-2021 averted by condom use and antiretroviral therapy (ART) uptake among key populations and non-key populations, the direct and indirect contribution of specific groups to new infections [transmission population-attributable fraction (tPAF)] over 2012-2021 due to prevention gaps, and the distribution of undiagnosed people with HIV (PWH) by risk group in January 2022 and their tPAF over 2022-2031. RESULTS Condom use and ART may have averted 81-88% of new HIV infections over 2012-2021 across countries, mostly due to condom use by key population. The tPAF of all key populations combined over 2012-2021 varied between 27% (Côte d'Ivoire) and 79% (Senegal). Male key populations (clients of FSW and MSM) contributed most to new infections (>60% in Mali and Senegal) owing to their higher HIV prevalence and larger prevention gaps. In 2022, men represented 56% of all PWH with an undiagnosed infection in Côte d'Ivoire (male key populations = 15%), 46% in Mali (male key populations = 23%), and 69% in Senegal (male key populations = 55%). If HIV testing and ART initiation rates remain at current levels, 20% of new HIV infections could be due to undiagnosed key populations living with HIV in Côte d'Ivoire over 2022-2031, 53% in Mali, and 65% in Senegal. CONCLUSION Substantial HIV diagnosis gaps remain in Western Africa, especially among male key populations. Addressing these gaps is key to impacting the HIV epidemics in the region and achieving the goal of ending AIDS by 2030.
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Affiliation(s)
- Romain Silhol
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, UK
| | - Mathieu Maheu-Giroux
- Department of Epidemiology and Biostatistics, School of Population and Global Health, Faculty of Medicine and Health Sciences, McGill University, Montréal, QC, Canada
| | - Nirali Soni
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, UK
| | - Arlette Simo Fotso
- Centre Population & Développement, Université Paris Cité, IRD, Inserm, Paris
- Institut National d’Études Démographiques, INED, Aubervilliers
| | - Nicolas Rouveau
- Centre Population & Développement, Université Paris Cité, IRD, Inserm, Paris
| | - Anthony Vautier
- Solidarité Thérapeutique et Initiatives pour la Santé, Solthis, Paris, France
| | | | - Olivier Geoffroy
- Solidarité Thérapeutique et Initiatives pour la Santé, Solthis, Abidjan, Côte d’Ivoire
| | | | - Younoussa Sidibé
- Solidarité Thérapeutique et Initiatives pour la Santé, Solthis, Bamako, Mali
| | - Odé Kanku Kabemba
- Solidarité Thérapeutique et Initiatives pour la Santé, Solthis, Bamako, Mali
| | - Papa Alioune Gueye
- Solidarité Thérapeutique et Initiatives pour la Santé, Solthis, Dakar, Sénégal
| | - Pauline Dama Ndeye
- Solidarité Thérapeutique et Initiatives pour la Santé, Solthis, Dakar, Sénégal
| | - Christinah Mukandavire
- Department of Epidemiology and Data Science, Coalition for Epidemic Preparedness and Innovations, London, UK
- School of Mathematics and Data Science, Emirates Aviation University, Dubai, United Arab Emirates
| | - Peter Vickerman
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
| | - Abdelaye Keita
- Institut National de Santé Publique (INSP), Bamako, Mali
| | - Cheikh Tidiane Ndour
- Division de Lutte contre le Sida et les IST, Ministère de la Santé et de l’Action Sociale Institut d’Hygiène Sociale, Dakar, Sénégal
| | - Eboi Ehui
- Programme National de Lutte contre le Sida, Abidjan, Côte d’Ivoire
| | - Joseph Larmarange
- Centre Population & Développement, Université Paris Cité, IRD, Inserm, Paris
- Institut National d’Études Démographiques, INED, Aubervilliers
| | - Marie-Claude Boily
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, UK
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Jones HS, Anderson RL, Cust H, McClelland RS, Richardson BA, Thirumurthy H, Malama K, Hensen B, Platt L, Rice B, Cowan FM, Imai-Eaton JW, Hargreaves JR, Stevens O. HIV incidence among women engaging in sex work in sub-Saharan Africa: a systematic review and meta-analysis. Lancet Glob Health 2024; 12:e1244-e1260. [PMID: 39030057 DOI: 10.1016/s2214-109x(24)00227-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 04/08/2024] [Accepted: 05/24/2024] [Indexed: 07/21/2024]
Abstract
BACKGROUND Women who engage in sex work in sub-Saharan Africa have a high risk of acquiring HIV infection. HIV incidence has declined among all women in sub-Saharan Africa, but trends among women who engage in sex work are poorly characterised. We synthesised data on HIV incidence among women who engage in sex work in sub-Saharan Africa and compared these with the total female population to understand relative incidence and trends over time. METHODS We searched MEDLINE, Embase, Global Health, and Google Scholar from Jan 1, 1990, to Feb 28, 2024, and grey literature for studies that reported empirical estimates of HIV incidence among women who engage in sex work in any sub-Saharan Africa country. We calculated incidence rate ratios (IRRs) compared with total female population incidence estimates matched for age, district, and year, did a meta-analysis of IRRs, and used a continuous mixed-effects model to estimate changes in IRR over time. FINDINGS From 32 studies done between 1985 and 2020, 2194 new HIV infections were observed among women who engage in sex work over 51 490 person-years. Median HIV incidence was 4·3 per 100 person years (IQR 2·8-7·0 per 100 person-years). Incidence among women who engage in sex work was eight times higher than matched total population women (IRR 7·8 [95% CI 5·1-11·8]), with larger relative difference in western and central Africa (19·9 [9·6-41·0]) than in eastern and southern Africa (4·9 [3·4-7·1]). There was no evidence that IRRs changed over time (IRR per 5 years: 0·9 [0·7-1·2]). INTERPRETATION Across sub-Saharan Africa, HIV incidence among women who engage in sex work remains disproportionately high compared with the total female population. However, constant relative incidence over time indicates HIV incidence among women who engage in sex work has declined at a similar rate. Location-specific data for women who engage in sex work incidence are sparse, but improved surveillance and standardisation of incidence measurement approaches could fill these gaps. Sustained and enhanced HIV prevention for women who engage in sex work is crucial to address continuing inequalities and ensure declines in new HIV infections. FUNDING Bill & Melinda Gates Foundation, UK Research and Innovation, National Institutes of Health. TRANSLATION For the French translation of the abstract see Supplementary Materials section.
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Affiliation(s)
- Harriet S Jones
- Faculty of Public Health and Policy, London School of Hygiene and Tropical Medicine, London, UK.
| | - Rebecca L Anderson
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, UK
| | - Henry Cust
- Institute of Global Health, University College London, London, UK
| | - R Scott McClelland
- Department of Medicine, University of Washington, Seattle, WA, USA; Department of Epidemiology, University of Washington, Seattle, WA, USA; Department of Biostatistics, University of Washington, Seattle, WA, USA; Department of Global Health, University of Washington, Seattle, WA, USA
| | - Barbra A Richardson
- Department of Biostatistics, University of Washington, Seattle, WA, USA; Department of Global Health, University of Washington, Seattle, WA, USA
| | - Harsha Thirumurthy
- Department of Medical Ethics and Health Policy, University of Pennsylvania, Philadelphia, PA, USA
| | - Kalonde Malama
- Ingram School of Nursing, McGill University, Montréal, Quebec, QC, Canada
| | - Bernadette Hensen
- Sexual and Reproductive Health Group, Department of Public Health, Institute of Tropical Medicine, Antwerp, Belgium
| | - Lucy Platt
- Faculty of Public Health and Policy, London School of Hygiene and Tropical Medicine, London, UK
| | - Brian Rice
- Sheffield Centre for Health and Related Research, School of Medicine and Population Health, University of Sheffield, UK
| | - Frances M Cowan
- Department of International Public Health, Liverpool School of Tropical Medicine, Liverpool, UK; Centre for Sexual Health and HIV/AIDS Research Zimbabwe, Harare, Zimbabwe
| | - Jeffrey W Imai-Eaton
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, UK; Center for Communicable Disease Dynamics, Department of Epidemiology, Harvard T H Chan School of Public Health, Boston, MA, USA
| | - James R Hargreaves
- Faculty of Public Health and Policy, London School of Hygiene and Tropical Medicine, London, UK
| | - Oliver Stevens
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, UK
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Silhol R, Maheu-Giroux M, Soni N, Simo Fotso A, Rouveau N, Vautier A, Doumenc-Aïdara C, Geoffroy O, N'Guessan KN, Sidibé Y, Kabemba OK, Gueye PA, Ndeye PD, Mukandavire C, Vickerman P, Keita A, Ndour CT, Larmarange J, Boily MC. Potential population-level effects of HIV self-test distribution among key populations in Côte d'Ivoire, Mali, and Senegal: a mathematical modelling analysis. Lancet HIV 2024; 11:e531-e541. [PMID: 38991596 DOI: 10.1016/s2352-3018(24)00126-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 04/24/2024] [Accepted: 05/07/2024] [Indexed: 07/13/2024]
Abstract
BACKGROUND During 2019-21, the AutoTest VIH, Libre d'accéder à la connaissance de son Statut (ATLAS) programme distributed around 380 000 HIV self-testing kits to key populations, including female sex workers, men who have sex with men, and their partners, in Côte d'Ivoire, Mali, and Senegal. We aimed to estimate the effects of the ATLAS programme and national scale-up of HIV self-test distribution on HIV diagnosis, HIV treatment coverage, HIV incidence, and HIV-related mortality. METHODS We adapted a deterministic compartmental model of HIV transmission in Côte d'Ivoire, parameterised and fitted to country-specific demographic, behavioural, HIV epidemiological, and intervention data in Côte d'Ivoire, Mali, and Senegal separately during 1980-2020. We simulated dynamics of new HIV infections, HIV diagnoses, and HIV-related deaths within scenarios with and without HIV self-test distribution among key populations. Models were separately parameterised and fitted to country-specific sets of epidemiological and intervention outcomes (stratified by sex, risk, age group, and HIV status, if available) over time within a Bayesian framework. We estimated the effects on the absolute increase in the proportion of people with HIV diagnosed at the end of 2021 for the ATLAS-only scenario and at the end of 2028 and 2038 for the HIV self-testing scale-up scenario. We estimated cumulative numbers of additional HIV diagnoses and initiations of antiretroviral therapy and the proportion and absolute numbers of new HIV infections and HIV-related deaths averted during 2019-21 and 2019-28 for the ATLAS-only scenario and during 2019-28 and 2019-38 for the HIV self-testing scale-up scenario. FINDINGS Our model estimated that ATLAS could have led to 700 (90% uncertainty interval [UI] 500-900) additional HIV diagnoses in Côte d'Ivoire, 500 (300-900) in Mali, and 300 (50-700) in Senegal during 2019-21, a 0·4 percentage point (90% UI 0·3-0·5) increase overall by the end of 2021. During 2019-28, ATLAS was estimated to avert 1900 (90% UI 1300-2700) new HIV infections and 600 (400-800) HIV-related deaths across the three countries, of which 38·6% (90% UI 31·8-48·3) of new infections and 70·1% (60·4-77·3) of HIV-related deaths would be among key populations. ATLAS would avert 1·5% (0·8-3·1) of all HIV-related deaths across the three countries during this period. Scaling up HIV self-testing would avert 16·2% (90% UI 10·0-23·1) of all new HIV infections during 2019-28 in Senegal, 5·3% (3·0-8·9) in Mali, and 1·6% (1·0-2·4) in Côte d'Ivoire. HIV self-testing scale-up among key populations was estimated to increase HIV diagnosis by the end of 2028 to 1·3 percentage points (90% UI 0·8-1·9) in Côte d'Ivoire, 10·6 percentage points (5·3-16·8) in Senegal, and 3·6 percentage points (2·0-6·4) in Mali. INTERPRETATION Scaling up HIV self-test distribution among key populations in western Africa could attenuate disparities in access to HIV testing and reduce infections and deaths among key populations and their partners. FUNDING Unitaid, Solthis, the UK Medical Research Council Centre for Global Infectious Disease Analysis, the EU European & Developing Countries Clinical Trials Partnership programme, and the Wellcome Trust. TRANSLATION For the French translation of the abstract see Supplementary Materials section.
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Affiliation(s)
- Romain Silhol
- Medical Research Council Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, UK.
| | - Mathieu Maheu-Giroux
- Department of Epidemiology and Biostatistics, School of Population and Global Health, Faculty of Medicine and Health Sciences, McGill University, Montreal, QC, Canada
| | - Nirali Soni
- Medical Research Council Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, UK
| | - Arlette Simo Fotso
- Centre Population et Développement, Université Paris Cité, Institut de Recherche pour le Développement, Institut National de la Santé et de la Recherche Médicale, Paris, France; French Institute for Demographic Studies, Institut National d'Études Démographiques, Paris, France
| | - Nicolas Rouveau
- Centre Population et Développement, Université Paris Cité, Institut de Recherche pour le Développement, Institut National de la Santé et de la Recherche Médicale, Paris, France
| | - Anthony Vautier
- Solidarité Thérapeutique et Initiatives pour la Santé, Solthis, Dakar, Senegal
| | | | - Olivier Geoffroy
- Solidarité Thérapeutique et Initiatives pour la Santé, Solthis, Abidjan, Côte d'Ivoire
| | | | - Younoussa Sidibé
- Solidarité Thérapeutique et Initiatives pour la Santé, Solthis, Bamako, Mali
| | - Odé Kanku Kabemba
- Solidarité Thérapeutique et Initiatives pour la Santé, Solthis, Bamako, Mali
| | - Papa Alioune Gueye
- Solidarité Thérapeutique et Initiatives pour la Santé, Solthis, Dakar, Senegal
| | - Pauline Dama Ndeye
- Solidarité Thérapeutique et Initiatives pour la Santé, Solthis, Dakar, Senegal
| | - Christinah Mukandavire
- Faculty of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, London, UK
| | - Peter Vickerman
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
| | | | - Cheikh Tidiane Ndour
- Division de Lutte contre le Sida et les Infections Sexuellement Transmissibles, Ministère de la Santé et de l'Action Sociale Institut d'Hygiène Sociale, Dakar, Senegal
| | - Joseph Larmarange
- Centre Population et Développement, Université Paris Cité, Institut de Recherche pour le Développement, Institut National de la Santé et de la Recherche Médicale, Paris, France; French Institute for Demographic Studies, Institut National d'Études Démographiques, Paris, France
| | - Marie-Claude Boily
- Medical Research Council Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, UK
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Lu IJ, Silhol R, d'Elbée M, Boily M, Soni N, Ky‐Zerbo O, Vautier A, Simo Fosto A, Badiane K, Traoré M, Terris‐Prestholt F, Larmarange J, Maheu‐Giroux M. Cost-effectiveness analysis of community-led HIV self-testing among key populations in Côte d'Ivoire, Mali, and Senegal. J Int AIDS Soc 2024; 27:e26334. [PMID: 39034541 PMCID: PMC11260876 DOI: 10.1002/jia2.26334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Accepted: 06/27/2024] [Indexed: 07/23/2024] Open
Abstract
INTRODUCTION HIV self-testing (HIVST) is a promising strategy to improve diagnosis coverage among key populations (KP). The ATLAS (Auto Test VIH, Libre d'Accéder à la connaissance de son Statut) programme implemented HIVST in three West African countries, distributing over 380,000 kits up between 2019 and 2021, focussing on community-led distribution by KP to their peers and subsequent secondary distribution to their partners and clients. We aim to evaluate the cost-effectiveness of community-led HIVST in Côte d'Ivoire, Mali and Senegal. METHODS An HIV transmission dynamics model was adapted and calibrated to country-specific epidemiological data and used to predict the impact of HIVST. We considered the distribution of HIVST among two KP-female sex workers (FSW), and men who have sex with men (MSM)-and their sexual partners and clients. We compared the cost-effectiveness of two scenarios against a counterfactual without HIVST over a 20-year horizon (2019-2039). The ATLAS-only scenario mimicked the 2-year implemented ATLAS programme, whereas the ATLAS-scale-up scenario achieved 95% coverage of HIVST distribution among FSW and MSM by 2025 onwards. The primary outcome is the number of disability-adjusted life-years (DALY) averted. Scenarios were compared using incremental cost-effectiveness ratios (ICERs). Costing was performed using a healthcare provider's perspective. Costs were discounted at 4%, converted to $USD 2022 and estimated using a cost-function to accommodate economies of scale. RESULTS The ATLAS-only scenario was highly cost-effective over 20 years, even at low willingness-to-pay thresholds. The median ICERs were $126 ($88-$210) per DALY averted in Côte d'Ivoire, $92 ($88-$210) in Mali and 27$ ($88-$210) in Senegal. Scaling-up the ATLAS programme would also be cost-effective, and substantial epidemiological impacts would be achieved. The ICERs for the scale-up scenario were $199 ($122-$338) per DALY averted in Côte d'Ivoire, $224 ($118-$415) in Mali and $61 ($18-$128) in Senegal. CONCLUSIONS Both the implemented and the potential scale-up of community-led HIVST programmes in West Africa, where KP are important to overall transmission dynamics, have the potential to be highly cost-effective, as compared to a scenario without HIVST. These findings support the scale-up of community-led HIVST to reach populations that otherwise may not access conventional testing services.
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Affiliation(s)
- Ingrid Jiayin Lu
- Department of Epidemiology and BiostatisticsSchool of Population and Global HealthFaculty of Medicine and Health SciencesMcGill UniversityMontréalQuébecCanada
| | - Romain Silhol
- Medical Research Council Centre for Global Infectious Disease AnalysisImperial College LondonLondonUK
| | - Marc d'Elbée
- University of BordeauxNational Institute for Health and Medical Research (INSERM) UMR 1219Research Institute for Sustainable Development (IRD) EMR 271Bordeaux Population Health CentreBordeauxFrance
- CepedUniversité Paris CitéIRDInsermParisFrance
| | - Marie‐Claude Boily
- Medical Research Council Centre for Global Infectious Disease AnalysisImperial College LondonLondonUK
| | - Nirali Soni
- Medical Research Council Centre for Global Infectious Disease AnalysisImperial College LondonLondonUK
| | - Odette Ky‐Zerbo
- TransVIHMIUniversité de MontpellierIRDINSERMMontpellierFrance
| | | | - Artlette Simo Fosto
- L'Institut national d’études démographiques (INED)AubervilliersFrance
- Ceped UMR 196, Université Paris CitéResearch Institute for Sustainable Development (IRD)InsermParisFrance
| | | | - Metogara Traoré
- Université LavalQuébec CityQuébecCanada
- VITAM ‐ Centre de recherche en santé durableQuébec CityQuébecCanada
- Centre de recherche du CHU de QuébecQuébec CityQuébecCanada
| | | | | | - Mathieu Maheu‐Giroux
- Department of Epidemiology and BiostatisticsSchool of Population and Global HealthFaculty of Medicine and Health SciencesMcGill UniversityMontréalQuébecCanada
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Korenromp EL, Sabin K, Stover J, Brown T, Johnson LF, Martin-Hughes R, ten Brink D, Teng Y, Stevens O, Silhol R, Arias-Garcia S, Kimani J, Glaubius R, Vickerman P, Mahy M. New HIV Infections Among Key Populations and Their Partners in 2010 and 2022, by World Region: A Multisources Estimation. J Acquir Immune Defic Syndr 2024; 95:e34-e45. [PMID: 38180737 PMCID: PMC10769164 DOI: 10.1097/qai.0000000000003340] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2024]
Abstract
BACKGROUND Previously, The Joint United Nations Programme on HIV/AIDS estimated proportions of adult new HIV infections among key populations (KPs) in the last calendar year, globally and in 8 regions. We refined and updated these, for 2010 and 2022, using country-level trend models informed by national data. METHODS Infections among 15-49 year olds were estimated for sex workers (SWs), male clients of female SW, men who have sex with men (MSM), people who inject drugs (PWID), transgender women (TGW), and non-KP sex partners of these groups. Transmission models used were Goals (71 countries), AIDS Epidemic Model (13 Asian countries), Optima (9 European and Central Asian countries), and Thembisa (South Africa). Statistical Estimation and Projection Package fits were used for 15 countries. For 40 countries, new infections in 1 or more KPs were approximated from first-time diagnoses by the mode of transmission. Infection proportions among nonclient partners came from Goals, Optima, AIDS Epidemic Model, and Thembisa. For remaining countries and groups not represented in models, median proportions by KP were extrapolated from countries modeled within the same region. RESULTS Across 172 countries, estimated proportions of new adult infections in 2010 and 2022 were both 7.7% for SW, 11% and 20% for MSM, 0.72% and 1.1% for TGW, 6.8% and 8.0% for PWID, 12% and 10% for clients, and 5.3% and 8.2% for nonclient partners. In sub-Saharan Africa, proportions of new HIV infections decreased among SW, clients, and non-KP partners but increased for PWID; elsewhere these groups' 2010-to-2022 differences were opposite. For MSM and TGW, the proportions increased across all regions. CONCLUSIONS KPs continue to have disproportionately high HIV incidence.
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Affiliation(s)
- Eline L. Korenromp
- Data for Impact Department, The Joint United Nations Program on HIV/AIDS (UNAIDS), Geneva, Switzerland
| | - Keith Sabin
- Data for Impact Department, The Joint United Nations Program on HIV/AIDS (UNAIDS), Geneva, Switzerland
| | - John Stover
- Center for Modeling, Planning and Policy Analysis, Avenir Health, Glastonbury, CT
| | - Tim Brown
- Research Program, East-West Center, Honolulu, HI
| | - Leigh F. Johnson
- Centre for Infectious Disease Epidemiology and Research, University of Cape Town, Cape Town, South Africa
| | - Rowan Martin-Hughes
- Macfarlane Burnet Institute for Medical Research and Public Health, Melbourne, Australia
| | - Debra ten Brink
- Macfarlane Burnet Institute for Medical Research and Public Health, Melbourne, Australia
| | - Yu Teng
- Center for Modeling, Planning and Policy Analysis, Avenir Health, Glastonbury, CT
| | - Oliver Stevens
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, United Kingdom
| | - Romain Silhol
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, United Kingdom
- HIV Prevention Trials Network Modelling Centre, Imperial College London, London, United Kingdom
| | - Sonia Arias-Garcia
- Data for Impact Department, The Joint United Nations Program on HIV/AIDS (UNAIDS), Geneva, Switzerland
| | - Joshua Kimani
- Partners for Health and Development in Africa, Nairobi, Kenya
- University of Nairobi, Nairobi, Kenya; and
| | - Robert Glaubius
- Center for Modeling, Planning and Policy Analysis, Avenir Health, Glastonbury, CT
| | - Peter Vickerman
- Population Health Sciences, University of Bristol, Bristol, United Kingdom
| | - Mary Mahy
- Data for Impact Department, The Joint United Nations Program on HIV/AIDS (UNAIDS), Geneva, Switzerland
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6
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Silhol R, Anderson RL, Stevens O, Stannah J, Booton RD, Baral S, Dimitrov D, Mitchell KM, Donnell D, Bershteyn A, Brown T, Kelly SL, Kim HY, Johnson LF, Maheu-Giroux M, Martin-Hughes R, Mishra S, Peerapatanapokin W, Stone J, Stover J, Teng Y, Vickerman P, Garcia SA, Korenromp E, Imai-Eaton JW, Boily MC. Measuring HIV Acquisitions Among Partners of Key Populations: Estimates From HIV Transmission Dynamic Models. J Acquir Immune Defic Syndr 2024; 95:e59-e69. [PMID: 38180739 PMCID: PMC10769162 DOI: 10.1097/qai.0000000000003334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2024]
Abstract
BACKGROUND Key populations (KPs), including female sex workers (FSWs), gay men and other men who have sex with men (MSM), people who inject drugs (PWID), and transgender women (TGW) experience disproportionate risks of HIV acquisition. The UNAIDS Global AIDS 2022 Update reported that one-quarter of all new HIV infections occurred among their non-KP sexual partners. However, this fraction relied on heuristics regarding the ratio of new infections that KPs transmitted to their non-KP partners to the new infections acquired among KPs (herein referred to as "infection ratios"). We recalculated these ratios using dynamic transmission models. SETTING One hundred seventy-eight settings (106 countries). METHODS Infection ratios for FSW, MSM, PWID, TGW, and clients of FSW were estimated from 12 models for 2020. RESULTS Median model estimates of infection ratios were 0.7 (interquartile range: 0.5-1.0; n = 172 estimates) and 1.2 (0.8-1.8; n = 127) for acquisitions from FSW clients and transmissions from FSW to all their non-KP partners, respectively, which were comparable with the previous UNAIDS assumptions (0.2-1.5 across regions). Model estimates for female partners of MSM were 0.5 (0.2-0.8; n = 20) and 0.3 (0.2-0.4; n = 10) for partners of PWID across settings in Eastern and Southern Africa, lower than the corresponding UNAIDS assumptions (0.9 and 0.8, respectively). The few available model estimates for TGW were higher [5.1 (1.2-7.0; n = 8)] than the UNAIDS assumptions (0.1-0.3). Model estimates for non-FSW partners of FSW clients in Western and Central Africa were high (1.7; 1.0-2.3; n = 29). CONCLUSIONS Ratios of new infections among non-KP partners relative to KP were high, confirming the importance of better addressing prevention and treatment needs among KP as central to reducing overall HIV incidence.
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Affiliation(s)
- Romain Silhol
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, United Kingdom
- HIV Prevention Trials Network Modelling Centre, Imperial College London, London, United Kingdom
| | - Rebecca L. Anderson
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, United Kingdom
| | - Oliver Stevens
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, United Kingdom
| | - James Stannah
- Department of Epidemiology and Biostatistics, School of Population and Global Health, Faculty of Medicine and Health Sciences, McGill University, Montréal, Quebec, Canada
| | - Ross D. Booton
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, United Kingdom
| | - Stefan Baral
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD
| | - Dobromir Dimitrov
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Center, Seattle, WA
| | - Kate M. Mitchell
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, United Kingdom
- HIV Prevention Trials Network Modelling Centre, Imperial College London, London, United Kingdom
- Department of Nursing and Community Health, Glasgow Caledonian University London, London, United Kindom
| | - Deborah Donnell
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Center, Seattle, WA
| | - Anna Bershteyn
- Department of Population Health, New York University Grossman School of Medicine, New York, New York
| | - Tim Brown
- Research Program, East-West Center, Honolulu, HI
| | | | - Hae-Young Kim
- Department of Population Health, New York University Grossman School of Medicine, New York, New York
| | - Leigh F. Johnson
- Centre for Infectious Disease Epidemiology and Research, School of Public Health, University of Cape Town, Cape Town, South Africa
| | - Mathieu Maheu-Giroux
- Department of Epidemiology and Biostatistics, School of Population and Global Health, Faculty of Medicine and Health Sciences, McGill University, Montréal, Quebec, Canada
| | | | - Sharmistha Mishra
- Department of Medicine, University of Toronto, Toronto, Ontario, Canada
| | | | - Jack Stone
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, United Kingdom
| | | | - Yu Teng
- Avenir Health, Glastonbury, CT
| | - Peter Vickerman
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, United Kingdom
| | | | | | - Jeffrey W. Imai-Eaton
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, United Kingdom
- Center for Communicable Disease Dynamics, Department of Epidemiology, Harvard T. H. Chan School of Public Health, Boston, MA
| | - Marie-Claude Boily
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, United Kingdom
- HIV Prevention Trials Network Modelling Centre, Imperial College London, London, United Kingdom
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Stevens O, Anderson R, Stover J, Teng Y, Stannah J, Silhol R, Jones H, Booton RD, Martin-Hughes R, Johnson L, Maheu-Giroux M, Mishra S, Stone J, Bershteyn A, Kim HY, Sabin K, Mitchell KM, Dimitrov D, Baral S, Donnell D, Korenromp E, Rice B, Hargreaves JR, Vickerman P, Boily MC, Imai-Eaton JW. Comparison of Empirically Derived and Model-Based Estimates of Key Population HIV Incidence and the Distribution of New Infections by Population Group in Sub-Saharan Africa. J Acquir Immune Defic Syndr 2024; 95:e46-e58. [PMID: 38180738 PMCID: PMC10769165 DOI: 10.1097/qai.0000000000003321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2024]
Abstract
BACKGROUND The distribution of new HIV infections among key populations, including female sex workers (FSWs), gay men and other men who have sex with men (MSM), and people who inject drugs (PWID) are essential information to guide an HIV response, but data are limited in sub-Saharan Africa (SSA). We analyzed empirically derived and mathematical model-based estimates of HIV incidence among key populations and compared with the Joint United Nations Programme on HIV/AIDS (UNAIDS) estimates. METHODS We estimated HIV incidence among FSW and MSM in SSA by combining meta-analyses of empirical key population HIV incidence relative to the total population incidence with key population size estimates (KPSE) and HIV prevalence. Dynamic HIV transmission model estimates of HIV incidence and percentage of new infections among key populations were extracted from 94 country applications of 9 mathematical models. We compared these with UNAIDS-reported distribution of new infections, implied key population HIV incidence and incidence-to-prevalence ratios. RESULTS Across SSA, empirical FSW HIV incidence was 8.6-fold (95% confidence interval: 5.7 to 12.9) higher than total population female 15-39 year incidence, and MSM HIV incidence was 41.8-fold (95% confidence interval: 21.9 to 79.6) male 15-29 year incidence. Combined with KPSE, these implied 12% of new HIV infections in 2021 were among FSW and MSM (5% and 7% respectively). In sensitivity analysis varying KPSE proportions within 95% uncertainty range, the proportion of new infections among FSW and MSM was between 9% and 19%. Insufficient data were available to estimate PWID incidence rate ratios. Across 94 models, median proportion of new infections among FSW, MSM, and PWID was 6.4% (interquartile range 3.2%-11.7%), both much lower than the 25% reported by UNAIDS. CONCLUSION Empirically derived and model-based estimates of HIV incidence confirm dramatically higher HIV risk among key populations in SSA. Estimated proportions of new infections among key populations in 2021 were sensitive to population size assumptions and were substantially lower than estimates reported by UNAIDS.
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Affiliation(s)
- Oliver Stevens
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, United Kingdom
| | - Rebecca Anderson
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, United Kingdom
| | - John Stover
- Center for Modeling, Planning and Policy Analysis, Avenir Health, Glastonbury, CT
| | - Yu Teng
- Center for Modeling, Planning and Policy Analysis, Avenir Health, Glastonbury, CT
| | - James Stannah
- Department of Epidemiology and Biostatistics, School of Population and Global Health, McGill University, Montréal, Canada
| | - Romain Silhol
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, United Kingdom
- HIV Prevention Trials Network Modelling Centre, Imperial College London, London, United Kingdom
| | - Harriet Jones
- Faculty of Public Health and Policy, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Ross D. Booton
- United Kingdom Heath Security Agency, London, United Kingdom
| | - Rowan Martin-Hughes
- Macfarlane Burnet Institute for Medical Research and Public Health, Melbourne, Australia
| | - Leigh Johnson
- Centre for Infectious Disease Epidemiology and Research, University of Cape Town, Cape Town, South Africa
| | - Mathieu Maheu-Giroux
- Department of Epidemiology and Biostatistics, School of Population and Global Health, McGill University, Montréal, Canada
| | - Sharmistha Mishra
- Division of Infectious Diseases, Department of Medicine, University of Toronto, Toronto, Ontario, Canada
- MAP Centre for Urban Health Solutions, Li Ka Shing Knowledge Institute, Unity Health Toronto, Toronto, Canada
| | - Jack Stone
- Population Health Sciences, University of Bristol, Bristol, United Kingdom
| | - Anna Bershteyn
- Department of Population Health, New York University Grossman School of Medicine, New York, NY
| | - Hae-Young Kim
- Department of Population Health, New York University Grossman School of Medicine, New York, NY
| | - Keith Sabin
- Data for Impact, The Joint United Nations Program on HIV/AIDS (UNAIDS), Geneva, Switzerland
| | - Kate M. Mitchell
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, United Kingdom
- Department of Nursing and Community Health, Glasgow Caledonian University London, London, United Kingdom
| | - Dobromir Dimitrov
- HIV Prevention Trials Network Modelling Centre, Imperial College London, London, United Kingdom
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Center, Seattle, WA
| | - Stefan Baral
- Department of Epidemiology, Johns Hopkins School of Public Health, Baltimore, MD
| | - Deborah Donnell
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Center, Seattle, WA
| | - Eline Korenromp
- Data for Impact, The Joint United Nations Program on HIV/AIDS (UNAIDS), Geneva, Switzerland
| | - Brian Rice
- School of Health and Related Research (SchARR), University of Sheffield, Sheffield, United Kingdom; and
| | - James R. Hargreaves
- Faculty of Public Health and Policy, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Peter Vickerman
- Population Health Sciences, University of Bristol, Bristol, United Kingdom
| | - Marie-Claude Boily
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, United Kingdom
- HIV Prevention Trials Network Modelling Centre, Imperial College London, London, United Kingdom
| | - Jeffrey W. Imai-Eaton
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, United Kingdom
- Center for Communicable Disease Dynamics, Department of Epidemiology, Harvard T. H. Chan School of Public Health, Boston, MA
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Guure C, Dery S, Afagbedzi S, Maya E, da-Costa Vroom FB, Torpey K. Correlates of prevalent HIV infection among adolescents, young adults, and older adult female sex workers in Ghana: Analysis of data from the Ghana biobehavioral survey. PLoS One 2023; 18:e0292686. [PMID: 37976280 PMCID: PMC10655993 DOI: 10.1371/journal.pone.0292686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 09/26/2023] [Indexed: 11/19/2023] Open
Abstract
BACKGROUND Human immunodeficiency virus infection remains a high burden among key populations such as female sex workers in the world. We aimed to provide distribution of prevalence and correlates of Human immunodeficiency virus infection among adolescent, young, and older adult FSWs in Ghana. METHODS This data was obtained from the biobehavioral survey of female sex workers (2020) in Ghana based on a time location sampling approach for the selection of respondents. A sampling frame was developed taking into consideration list of venues, days, and time that sex workers operate across all the regions of Ghana. These lists were derived from a sampling universe which was obtained during a mapping exercise. All sex workers aged 16 years and above and eligible on the day of visit participated. Human immunodeficiency virus testing was done based on First Response and Oraquick. To obtain estimates for sex workers, sampling weights were calculated and applied to the dataset. Inferential analyses using Bayesian regression models were applied with interaction effects. RESULTS A total of 5,990 participants completed both the biological and behavioral aspects of the study. The HIV prevalence among female sex workers in Ghana was 4.67% (CI: 4.05%, 5.40%). About 70% of the respondents who tested positive for Human immunodeficiency virus were among the older adults (= >25 years) group. Generally, there was a high prevalence variation across the 16 regions of Ghana, from 0.00% to 8.40%. Respondents' age was a significant contributor to the prevalence of HIV. Respondents who were forced into having sex had higher odds (38%) of being positive in the combined analysis. Respondents who had comprehensive knowledge of HIV had lower odds (39%) of testing positive. CONCLUSION The findings suggest a low prevalence of HIV among sex workers in 2020 compared to the 2011 and 2015 biobehavioral survey results but higher than the general population. Specifically, older adults have a higher prevalence of HIV. There is generally low level of comprehensive knowledge among sex workers. Interventions geared towards increasing FSW knowledge on risky behavior should be vigorously pursued.
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Affiliation(s)
- Chris Guure
- Department of Biostatistics, School of Public Health, University of Ghana, Legon, Accra, Ghana
- AND Department of Global Health and Population, Harvard T.H. Chan School of Public Health, Boston, MA, United States of America
| | - Samuel Dery
- Department of Biostatistics, School of Public Health, University of Ghana, Legon, Accra, Ghana
| | - Seth Afagbedzi
- Department of Biostatistics, School of Public Health, University of Ghana, Legon, Accra, Ghana
| | - Ernest Maya
- Department of Population, Family and Reproductive Health, School of Public Health, University of Ghana, Legon, Accra, Ghana
| | | | - Kwasi Torpey
- Department of Population, Family and Reproductive Health, School of Public Health, University of Ghana, Legon, Accra, Ghana
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Garenne M. Age-incidence and prevalence of HIV among intact and circumcised men: an analysis of PHIA surveys in Southern Africa. J Biosoc Sci 2023; 55:1156-1168. [PMID: 36286328 DOI: 10.1017/s0021932022000414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The study investigates the statistical relationship between male circumcision and HIV prevalence in Africa, in the context of the Voluntary Medical Male Circumcision (VMMC) campaigns in place since 2008. Data from the Population-based HIV Impact Assessment (PHIA) surveys conducted in African countries in 2017-2018 were utilized. Six countries with high HIV prevalence, low traditional circumcision and large VMMC programs were selected: Eswatini, Lesotho, Malawi, Namibia, Zambia, Zimbabwe. The statistical analysis investigated the relative risk (RR) of HIV prevalence by circumcision status (circumcised vs intact) among men age 20-59, and the age-incidence of HIV in the two groups among men age 20-49, defined as the linear-logistic slope of the relationship between prevalence and age. Results show that the standardized RR was not different from 1 at older ages (50-59): RR = 0.923, 95% CI = 0.769-1.108, P = 0.390. Furthermore, the age-incidence was at least as high or higher among the circumcised groups than among the intact groups. The standardized RR was lower than 1 at younger ages, and this could be explained by selection biases. HIV prevalence at age 40-59 (27.3%) was also the same in the four groups of circumcision status (intact, traditional, medical, unknown). Results matched earlier observations made in South Africa that circumcised and intact men had similar levels of HIV infection. The study questions the current strategy of large scale VMMC campaigns to control the HIV epidemic. These campaigns also raise a number of ethical issues.
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Affiliation(s)
- Michel Garenne
- MRC/Wits Rural Public Health and Health Transitions Research Unit, School of Public Health, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
- Extraordinary Professor, University of Western Cape, Department of Statistics and Population Studies, Cape Town, South Africa
- Senior Fellow, FERDI, Université d'Auvergne, Clermont-Ferrand, France
- Institut de Recherche pour le Développement (IRD), UMI Résiliences, Bondy, France
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10
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Jones HS, Anderson RL, Cust H, McClelland RS, Richardson BA, Thirumurthy H, Malama K, Hensen B, Platt L, Rice B, Cowan FM, Imai-Eaton JW, Hargreaves JR, Stevens O. HIV incidence among women engaging in sex work in sub-Saharan Africa: a systematic review and meta-analysis. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2023:2023.10.17.23297108. [PMID: 37905066 PMCID: PMC10615019 DOI: 10.1101/2023.10.17.23297108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/02/2023]
Abstract
Introduction HIV incidence among women in sub-Saharan Africa (SSA) has declined steadily, but it is unknown whether new infections among women who engage in sex work (WESW) have declined at a similar rate. We synthesised estimates of HIV incidence among WESW in SSA and compared these to the wider female population to understand levels and trends in incidence over time. Methods We searched Medline, Embase, Global Health, Popline, Web of Science, and Google Scholar from January 1990 to October 2022, and grey literature for estimates of HIV incidence among WESW in SSA. We included studies reporting empirical estimates in any SSA country. We calculated incidence rate ratios (IRR) compared to age-district-year matched total female population incidence estimates. We conducted a meta-analysis of IRRs and used a continuous mixed-effects model to estimate changes in IRR over time. Results From 32 studies between 1985 and 2020, 2,194 new HIV infections were observed in WESW over 51,000 person-years (py). Median HIV incidence was 4.3/100py (IQR 2.8-7.0/100py), declining from a median of 5.96/100py between 1985 and 1995 to a median of 3.2/100py between 2010 and 2020. Incidence among WESW was nine times higher than in matched total population women (RR 8.6, 95%CI: 5.7-12.9), and greater in Western and Central Africa (RR 22.4, 95%CI: 11.3-44.3) than in Eastern and Southern Africa (RR 5.3, 95%CI: 3.7-7.6). Annual changes in log IRRs were minimal (-0.1% 95%CI: -6.9 to +6.8%). Conclusions Across SSA, HIV incidence among WESW remains disproportionately high compared to the total female population but showed similar rates of decline between 1990 and 2020. Improved surveillance and standardisation of approaches to obtain empirical estimates of sex worker incidence would enable a clearer understanding of whether we are on track to meet global targets for this population and better support data-driven HIV prevention programming.
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Affiliation(s)
- Harriet S Jones
- Faculty of Public Health and Policy, London School of Hygiene and Tropical Medicine, London, UK
| | - Rebecca L Anderson
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, United Kingdom
| | - Henry Cust
- Faculty of Public Health and Policy, London School of Hygiene and Tropical Medicine, London, UK
- Department of Global Health and Development, London School of Hygiene and Tropical Medicine, London, UK
| | - R Scott McClelland
- Department of Medicine, University of Washington, Seattle, WA, USA
- Department of Epidemiology, University of Washington, Seattle, WA, United States of America
- Department of Biostatistics, University of Washington, Seattle, WA, USA
| | - Barbra A Richardson
- Department of Biostatistics, University of Washington, Seattle, WA, USA
- Department of Global Health, University of Washington, Seattle, WA, United States of America
| | - Harsha Thirumurthy
- Department of Medical Ethics and Health Policy, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Kalonde Malama
- University of Toronto Factor-Inwentash Faculty of Social Work, Toronto Ontario, Canada
| | - Bernadette Hensen
- Sexual and Reproductive Health Group, Department of Public Health, Institute of Tropical Medicine, Antwerp, Belgium
| | - Lucy Platt
- Faculty of Public Health and Policy, London School of Hygiene and Tropical Medicine, London, UK
| | - Brian Rice
- Sheffield Centre for Health and Related Research (SCHARR); School of Medicine and Population Health, University of Sheffield, UK
| | - Frances M Cowan
- Department of International Public Health, Liverpool School of Tropical Medicine, Liverpool, UK
- Centre for Sexual Health and HIV/AIDS Research Zimbabwe, Harare, Zimbabwe
| | - Jeffrey W Imai-Eaton
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, United Kingdom
- Center for Communicable Disease Dynamics, Department of Epidemiology, Harvard T. H. Chan School of Public Health, Boston, MA, USA
| | - James R Hargreaves
- Faculty of Public Health and Policy, London School of Hygiene and Tropical Medicine, London, UK
| | - Oliver Stevens
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, United Kingdom
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11
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Elmi N, Marquez NG, Rucinski K, Lyons C, Turpin G, Ba I, Turpin N, Gouane E, Obodou E, Diouf D, Baral S. Meeting the reproductive health needs of female sex workers in Côte d'Ivoire: protecting the human right to dignified health. Reprod Health 2023; 20:133. [PMID: 37670305 PMCID: PMC10481554 DOI: 10.1186/s12978-023-01659-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Accepted: 07/30/2023] [Indexed: 09/07/2023] Open
Abstract
The sexual and reproductive health needs of female sex workers (FSW) are often understudied and underserved in the context of HIV-related research in countries across Sub-Saharan Africa and West Africa. We assessed the lived experiences of FSW across Côte d'Ivoire to characterize unmet reproductive health needs and opportunities to address them. From February-August, 2020, ENDA Santé, Côte d'Ivoire conducted 75 in-depth interviews and 15 focus group discussions with FSW and community informants in five cities in Côte d'Ivoire. Themes that emerged included the inconsistent use of contraception services, a history of unintended pregnancies, and experiences of stigma at public healthcare facilities. Opportunities to increase the impact of both SRH and HIV services included strengthening existing HIV and family planning service integration for FSW. Taken together, the results highlight the importance of addressing the unmet reproductive health needs of FSW to both optimize the HIV response and increase the delivery of human-rights affirming sexual and reproductive health services for sex workers.
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Affiliation(s)
- Nika Elmi
- Center for Public Health and Human Rights, Department of Epidemiology, Johns Hopkins School of Public Health, Baltimore, MD USA
| | - Nuria Gallego Marquez
- Center for Public Health and Human Rights, Department of Epidemiology, Johns Hopkins School of Public Health, Baltimore, MD USA
| | - Katherine Rucinski
- Center for Public Health and Human Rights, Department of Epidemiology, Johns Hopkins School of Public Health, Baltimore, MD USA
- Department of International Health, Johns Hopkins School of Public Health, Baltimore, MD USA
| | - Carrie Lyons
- Center for Public Health and Human Rights, Department of Epidemiology, Johns Hopkins School of Public Health, Baltimore, MD USA
| | - Gnilane Turpin
- Center for Public Health and Human Rights, Department of Epidemiology, Johns Hopkins School of Public Health, Baltimore, MD USA
| | | | | | - Emile Gouane
- ENDA Santé Côte d’Ivoire, Abidjan, Côte d’Ivoire
| | | | | | - Stefan Baral
- Center for Public Health and Human Rights, Department of Epidemiology, Johns Hopkins School of Public Health, Baltimore, MD USA
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Simo Fotso A, Johnson C, Vautier A, Kouamé KB, Diop PM, Silhol R, Maheu-Giroux M, Boily MC, Rouveau N, Doumenc-Aïdara C, Baggaley R, Ehui E, Larmarange J. Routine programmatic data show a positive population-level impact of HIV self-testing: the case of Côte d'Ivoire and implications for implementation. AIDS 2022; 36:1871-1879. [PMID: 35848584 PMCID: PMC9594126 DOI: 10.1097/qad.0000000000003328] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 06/29/2022] [Accepted: 07/04/2022] [Indexed: 02/04/2023]
Abstract
OBJECTIVES We estimate the effects of ATLAS's HIV self-testing (HIVST) kit distribution on conventional HIV testing, diagnoses, and antiretroviral treatment (ART) initiations in Côte d'Ivoire. DESIGN Ecological study using routinely collected HIV testing services program data. METHODS We used the ATLAS's programmatic data recorded between the third quarter of 2019 and the first quarter of 2021, in addition to data from the President's Emergency Plan for AIDS Relief dashboard. We performed ecological time series regression using linear mixed models. Results are presented per 1000 HIVST kits distributed through ATLAS. RESULTS We found a negative but nonsignificant effect of the number of ATLAS' distributed HIVST kits on conventional testing uptake (-190 conventional tests; 95% confidence interval [CI]: -427 to 37). The relationship between the number of HIVST kits and HIV diagnoses was significant and positive (+8 diagnosis; 95% CI: 0 to 15). No effect was observed on ART initiation (-2 ART initiations; 95% CI: -8 to 5). CONCLUSIONS ATLAS' HIVST kit distribution had a positive impact on HIV diagnoses. Despite the negative signal on conventional testing, even if only 20% of distributed kits are used, HIVST would increase access to testing. The methodology used in this paper offers a promising way to leverage routinely collected programmatic data to estimate the effects of HIVST kit distribution in real-world programs.
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Affiliation(s)
- Arlette Simo Fotso
- Centre Population & Développement, Université Paris-Cité, IRD, Inserm, Paris
- French Institute for Demographic Studies, INED, Aubervilliers, France
| | | | - Anthony Vautier
- Solidarité Thérapeutique et Initiatives pour la Santé, Solthis, Dakar, Sénégal
| | | | - Papa Moussa Diop
- Solidarité Thérapeutique et Initiatives pour la Santé, Solthis, Dakar, Sénégal
| | - Romain Silhol
- Medical Research Council Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, United Kingdom
| | - Mathieu Maheu-Giroux
- Department of Epidemiology and Biostatistics, School of Population and Global Health, McGill University, Montréal, QC, Canada
| | - Marie-Claude Boily
- Medical Research Council Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, United Kingdom
| | - Nicolas Rouveau
- Centre Population & Développement, Université Paris-Cité, IRD, Inserm, Paris
| | | | | | - Eboi Ehui
- Programme National de Lutte contre le Sida, Abidjan, Côte d’Ivoire
| | - Joseph Larmarange
- Centre Population & Développement, Université Paris-Cité, IRD, Inserm, Paris
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13
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Yu Z, Zhang TT, Wang X, Chang Q, Huang H, Zhang H, Song D, Yu M, Yang J, Liu Y, Li C, Cui Z, Ma J. Sexual behaviour changes and HIV infection among men who have sex with men: evidence from an open cohort in China. BMJ Open 2022; 12:e055046. [PMID: 36171031 PMCID: PMC9528664 DOI: 10.1136/bmjopen-2021-055046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
BACKGROUND The HIV epidemic in key populations such as men who have sex with men (MSM) is a public health issue of worldwide concern. China has seen an increase in newly diagnosed HIV infections through male-male sexual contact in the past decade. In a long-term cohort, how the complex behaviour pattern of MSM changed and the association with the HIV risk are unclear at present. METHODS This study was conducted from October 2011 to December 2019 in Tianjin. MSM were recruited by snowball sampling through online and offline ways. Demographic and sexual behavioural data were collected for analysis. Three indicators (condom use in last anal sex, frequency of condom use during anal sex and the number of sexual partners) were used to define the behaviour change. Participants with zero, one, and two or three risk indicators were categorised into behaviour types of 'protective', 'moderate', and 'fragile', respectively. Change in behaviour type between baseline and each visit was considered. Time-varying Cox models were performed to evaluate HIV infection risk. RESULTS Of 2029 MSM included in the study, 127 were new HIV diagnoses. The overall incidence rate was 3.36 per 100 person-years. The percentage of 'protective' and 'moderate' behaviour types had a conspicuous growth trend as the follow-up. Furthermore, the HIV incidence rate in each visit among different behaviour transition types showed a general downward trend as the number of total follow-up times increased. Individuals who remained in 'fragile' (adjusted HR (aHR): 25.86, 95% CI: 6.92 to 96.57) or changed from 'protective' to 'moderate' (aHR: 4.79, 95% CI: 1.18 to 19.47), 'protective' to 'fragile' (aHR: 23.03, 95% CI: 6.02 to 88.13), and 'moderate' to 'fragile' (aHR: 25.48, 95% CI: 6.79 to 95.40) between baseline and the last follow-up had a higher HIV risk. Gained risk indicators were associated with the increase of HIV risk (gained one indicator, aHR: 2.67, 95% CI: 1.68 to 4.24; gained two or three indicators, aHR: 4.99, 95% CI: 3.00 to 8.31) while losing just one risk indicator could halve the risk (aHR: 0.43, 95% CI: 0.21 to 0.90). CONCLUSIONS Among MSM in Tianjin, it is necessary to get timely behaviour change for those with high-incidence behaviour patterns while sustaining for those with low-incidence patterns. TRIAL REGISTRATION NUMBER Chinese Clinical Trials Registry (ChiCTR2000039500).
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Affiliation(s)
- Zeyang Yu
- School of Public Health, Tianjin Medical University, No. 22 Qixiangtai Road, Heping District, Tianjin, China
| | - Tian-Tian Zhang
- School of Public Health, Tianjin Medical University, No. 22 Qixiangtai Road, Heping District, Tianjin, China
| | - Xiaomeng Wang
- School of Public Health, Tianjin Medical University, No. 22 Qixiangtai Road, Heping District, Tianjin, China
| | - Qinxue Chang
- School of Public Health, Tianjin Medical University, No. 22 Qixiangtai Road, Heping District, Tianjin, China
| | - Huijie Huang
- School of Public Health, Tianjin Medical University, No. 22 Qixiangtai Road, Heping District, Tianjin, China
| | - Honglu Zhang
- School of Public Health, Tianjin Medical University, No. 22 Qixiangtai Road, Heping District, Tianjin, China
| | - Desheng Song
- School of Public Health, Tianjin Medical University, No. 22 Qixiangtai Road, Heping District, Tianjin, China
| | - Maohe Yu
- STD & AIDS Control and Prevention Section, Tianjin Centers for Disease Control and Prevention, No. 6 Huayue Road, Hedong District, Tianjin, China
| | - Jie Yang
- Tianjin Shenlan Community-Based Organization, No. 43, Shuimu Tiancheng Tuanjie Ring Road, Hongqiao District, Tianjin, China
| | - Yuanyuan Liu
- School of Public Health, Tianjin Medical University, No. 22 Qixiangtai Road, Heping District, Tianjin, China
| | - Changping Li
- School of Public Health, Tianjin Medical University, No. 22 Qixiangtai Road, Heping District, Tianjin, China
| | - Zhuang Cui
- School of Public Health, Tianjin Medical University, No. 22 Qixiangtai Road, Heping District, Tianjin, China
| | - Jun Ma
- School of Public Health, Tianjin Medical University, No. 22 Qixiangtai Road, Heping District, Tianjin, China
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HIV prevention in Africa: is VMMC useful and acceptable? Int J Impot Res 2022; 35:279-281. [PMID: 35488081 DOI: 10.1038/s41443-022-00575-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 04/15/2022] [Accepted: 04/21/2022] [Indexed: 11/08/2022]
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15
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Milwid RM, Xia Y, Doyle CM, Cox J, Lambert G, Thomas R, Mishra S, Grace D, Lachowsky NJ, Hart TA, Boily MC, Maheu-Giroux M. Past dynamics of HIV transmission among men who have sex with men in Montréal, Canada: a mathematical modeling study. BMC Infect Dis 2022; 22:233. [PMID: 35255860 PMCID: PMC8902714 DOI: 10.1186/s12879-022-07207-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Accepted: 02/24/2022] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND Gay, bisexual, and other men who have sex with men (gbMSM) experience disproportionate risks of HIV acquisition and transmission. In 2017, Montréal became the first Canadian Fast-Track City, setting the 2030 goal of zero new HIV infections. To inform local elimination efforts, we estimate the evolving role of prevention and sexual behaviours on HIV transmission dynamics among gbMSM in Montréal between 1975 and 2019. METHODS Data from local bio-behavioural surveys were analyzed to develop, parameterize, and calibrate an agent-based model of sexual HIV transmission. Partnership dynamics, HIV's natural history, and treatment and prevention strategies were considered. The model simulations were analyzed to estimate the fraction of HIV acquisitions and transmissions attributable to specific groups, with a focus on age, sexual partnering level, and gaps in the HIV care-continuum. RESULTS The model-estimated HIV incidence peaked in 1985 (2.3 per 100 person years (PY); 90% CrI: 1.4-2.9 per 100 PY) and decreased to 0.1 per 100 PY (90% CrI: 0.04-0.3 per 100 PY) in 2019. Between 2000-2017, the majority of HIV acquisitions and transmissions occurred among men aged 25-44 years, and men aged 35-44 thereafter. The unmet prevention needs of men with > 10 annual anal sex partners contributed 90-93% of transmissions and 67-73% of acquisitions annually. The primary stage of HIV played an increasing role over time, contributing to 11-22% of annual transmissions over 2000-2019. In 2019, approximately 70% of transmission events occurred from men who had discontinued, or never initiated antiretroviral therapy. CONCLUSIONS The evolving HIV landscape has contributed to the declining HIV incidence among gbMSM in Montréal. The shifting dynamics identified in this study highlight the need for continued population-level surveillance to identify gaps in the HIV care continuum and core groups on which to prioritize elimination efforts.
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Affiliation(s)
- Rachael M. Milwid
- grid.14709.3b0000 0004 1936 8649Department of Epidemiology and Biostatistics, School of Population and Global Health, McGill University, Montréal, QC Canada
| | - Yiqing Xia
- grid.14709.3b0000 0004 1936 8649Department of Epidemiology and Biostatistics, School of Population and Global Health, McGill University, Montréal, QC Canada
| | - Carla M. Doyle
- grid.14709.3b0000 0004 1936 8649Department of Epidemiology and Biostatistics, School of Population and Global Health, McGill University, Montréal, QC Canada
| | - Joseph Cox
- grid.14709.3b0000 0004 1936 8649Department of Epidemiology and Biostatistics, School of Population and Global Health, McGill University, Montréal, QC Canada ,grid.459278.50000 0004 4910 4652Direction Régionale de Santé Publique de Montréal, Montréal, QC Canada
| | - Gilles Lambert
- grid.459278.50000 0004 4910 4652Direction Régionale de Santé Publique de Montréal, Montréal, QC Canada
| | | | - Sharmistha Mishra
- grid.17063.330000 0001 2157 2938Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, ON Canada
| | - Daniel Grace
- grid.17063.330000 0001 2157 2938Social and Behavioural Health Sciences, Dalla Lana School of Public Health, University of Toronto, Toronto, ON Canada
| | - Nathan J. Lachowsky
- grid.143640.40000 0004 1936 9465School of Public Health and Social Policy, University of Victoria, Victoria, BC Canada
| | - Trevor A. Hart
- grid.68312.3e0000 0004 1936 9422Department of Psychology, Ryerson University, Toronto, ON Canada
| | - Marie-Claude Boily
- grid.7445.20000 0001 2113 8111Department of Infectious Diseases, Imperial College London, London, UK
| | - Mathieu Maheu-Giroux
- grid.14709.3b0000 0004 1936 8649Department of Epidemiology and Biostatistics, School of Population and Global Health, McGill University, Montréal, QC Canada
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16
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Hodgins C, Stannah J, Kuchukhidze S, Zembe L, Eaton JW, Boily MC, Maheu-Giroux M. Population sizes, HIV prevalence, and HIV prevention among men who paid for sex in sub-Saharan Africa (2000-2020): A meta-analysis of 87 population-based surveys. PLoS Med 2022; 19:e1003861. [PMID: 35077459 PMCID: PMC8789156 DOI: 10.1371/journal.pmed.1003861] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2021] [Accepted: 11/04/2021] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Key populations, including sex workers, are at high risk of HIV acquisition and transmission. Men who pay for sex can contribute to HIV transmission through sexual relationships with both sex workers and their other partners. To characterize the population of men who pay for sex in sub-Saharan Africa (SSA), we analyzed population size, HIV prevalence, and use of HIV prevention and treatment. METHODS AND FINDINGS We performed random-effects meta-analyses of population-based surveys conducted in SSA from 2000 to 2020 with information on paid sex by men. We extracted population size, lifetime number of sexual partners, condom use, HIV prevalence, HIV testing, antiretroviral (ARV) use, and viral load suppression (VLS) among sexually active men. We pooled by regions and time periods, and assessed time trends using meta-regressions. We included 87 surveys, totaling over 368,000 male respondents (15-54 years old), from 35 countries representing 95% of men in SSA. Eight percent (95% CI 6%-10%; number of surveys [Ns] = 87) of sexually active men reported ever paying for sex. Condom use at last paid sex increased over time and was 68% (95% CI 64%-71%; Ns = 61) in surveys conducted from 2010 onwards. Men who paid for sex had higher HIV prevalence (prevalence ratio [PR] = 1.50; 95% CI 1.31-1.72; Ns = 52) and were more likely to have ever tested for HIV (PR = 1.14; 95% CI 1.06-1.24; Ns = 81) than men who had not paid for sex. Men living with HIV who paid for sex had similar levels of lifetime HIV testing (PR = 0.96; 95% CI 0.88-1.05; Ns = 18), ARV use (PR = 1.01; 95% CI 0.86-1.18; Ns = 8), and VLS (PR = 1.00; 95% CI 0.86-1.17; Ns = 9) as those living with HIV who did not pay for sex. Study limitations include a reliance on self-report of sensitive behaviors and the small number of surveys with information on ARV use and VLS. CONCLUSIONS Paying for sex is prevalent, and men who ever paid for sex were 50% more likely to be living with HIV compared to other men in these 35 countries. Further prevention efforts are needed for this vulnerable population, including improved access to HIV testing and condom use initiatives. Men who pay for sex should be recognized as a priority population for HIV prevention.
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Affiliation(s)
- Caroline Hodgins
- Department of Microbiology and Immunology, McGill University, Montréal, Québec, Canada
| | - James Stannah
- Department of Epidemiology and Biostatistics, School of Population and Global Health, McGill University, Montréal, Québec, Canada
| | - Salome Kuchukhidze
- Department of Epidemiology and Biostatistics, School of Population and Global Health, McGill University, Montréal, Québec, Canada
| | - Lycias Zembe
- Joint United Nations Programme on HIV/AIDS, Geneva, Switzerland
| | - Jeffrey W. Eaton
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, United Kingdom
| | - Marie-Claude Boily
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, United Kingdom
| | - Mathieu Maheu-Giroux
- Department of Epidemiology and Biostatistics, School of Population and Global Health, McGill University, Montréal, Québec, Canada
- * E-mail:
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17
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Fraser H, Borquez A, Stone J, Abramovitz D, Brouwer KC, Goodman-Meza D, Hickman M, Patterson TL, Silverman J, Smith L, Strathdee SA, Martin NK, Vickerman P. Overlapping Key Populations and HIV Transmission in Tijuana, Mexico: A Modelling Analysis of Epidemic Drivers. AIDS Behav 2021; 25:3814-3827. [PMID: 34216285 PMCID: PMC8560668 DOI: 10.1007/s10461-021-03361-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/20/2021] [Indexed: 12/18/2022]
Abstract
Tijuana, Mexico, has a concentrated HIV epidemic among overlapping key populations (KPs) including people who inject drugs (PWID), female sex workers (FSW), their male clients, and men who have sex with men (MSM). We developed a dynamic HIV transmission model among these KPs to determine the extent to which their unmet prevention and treatment needs is driving HIV transmission. Over 2020-2029 we estimated the proportion of new infections acquired in each KP, and the proportion due to their unprotected risk behaviours. We estimate that 43.7% and 55.3% of new infections are among MSM and PWID, respectively, with FSW and their clients making-up < 10% of new infections. Projections suggest 93.8% of new infections over 2020-2029 will be due to unprotected sex between MSM or unsafe injecting drug use. Prioritizing interventions addressing sexual and injecting risks among MSM and PWID are critical to controlling HIV in Tijuana.
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Affiliation(s)
- Hannah Fraser
- Oakfield House, Population Health Sciences - Bristol Medical School, University of Bristol, Bristol, BS8 2BN, UK.
| | - Annick Borquez
- School of Medicine, University of California San Diego, San Diego, USA
| | - Jack Stone
- Oakfield House, Population Health Sciences - Bristol Medical School, University of Bristol, Bristol, BS8 2BN, UK
| | | | | | - David Goodman-Meza
- David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA
| | - Matthew Hickman
- Oakfield House, Population Health Sciences - Bristol Medical School, University of Bristol, Bristol, BS8 2BN, UK
| | | | - Jay Silverman
- School of Medicine, University of California San Diego, San Diego, USA
| | - Laramie Smith
- School of Medicine, University of California San Diego, San Diego, USA
| | | | - Natasha K Martin
- Oakfield House, Population Health Sciences - Bristol Medical School, University of Bristol, Bristol, BS8 2BN, UK
- School of Medicine, University of California San Diego, San Diego, USA
| | - Peter Vickerman
- Oakfield House, Population Health Sciences - Bristol Medical School, University of Bristol, Bristol, BS8 2BN, UK.
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18
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Silhol R, Geidelberg L, Mitchell KM, Mishra S, Dimitrov D, Bowring A, Béhanzin L, Guédou F, Diabaté S, Schwartz S, Billong SC, Njindam IM, Levitt D, Mukandavire C, Maheu-Giroux M, Rönn MM, Dalal S, Vickerman P, Baral S, Alary M, Boily MC. Assessing the Potential Impact of Disruptions Due to COVID-19 on HIV Among Key and Lower-Risk Populations in the Largest Cities of Cameroon and Benin. J Acquir Immune Defic Syndr 2021; 87:899-911. [PMID: 33657058 PMCID: PMC8191475 DOI: 10.1097/qai.0000000000002663] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Accepted: 02/08/2021] [Indexed: 11/26/2022]
Abstract
BACKGROUND The COVID-19 pandemic indirectly impacts HIV epidemiology in Central/West Africa. We estimated the potential impact of COVID-19-related disruptions to HIV prevention/treatment services and sexual partnerships on HIV incidence and HIV-related deaths among key populations including female sex workers (FSW), their clients, men who have sex with men, and overall. SETTING Yaoundé (Cameroon) and Cotonou (Benin). METHODS We used mathematical models of HIV calibrated to city population-specific and risk population-specific demographic/behavioral/epidemic data. We estimated the relative change in 1-year HIV incidence and HIV-related deaths for various disruption scenarios of HIV prevention/treatment services and decreased casual/commercial partnerships, compared with a scenario without COVID-19. RESULTS A 50% reduction in condom use in all partnerships over 6 months would increase 1-year HIV incidence by 39%, 42%, 31%, and 23% among men who have sex with men, FSW, clients, and overall in Yaoundé, respectively, and 69%, 49%, and 23% among FSW, clients, and overall, respectively, in Cotonou. Combining a 6-month interruption of ART initiation and 50% reduction in HIV prevention/treatment use would increase HIV incidence by 50% and HIV-related deaths by 20%. This increase in HIV infections would be halved by a simultaneous 50% reduction in casual and commercial partnerships. CONCLUSIONS Reductions in condom use after COVID-19 would increase infections among key populations disproportionately, particularly FSW in Cotonou, who need uninterrupted condom provision. Disruptions in HIV prevention/treatment services have the biggest impacts on HIV infections and deaths overall, only partially mitigated by equal reductions in casual/commercial sexual partnerships. Maintaining ART provision must be prioritized to minimize short-term excess HIV-related deaths.
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Affiliation(s)
- Romain Silhol
- MRC Centre for Global Infectious Disease Analysis, Abdul Latif Jameel Institute for Disease and Emergency Analytics (J-IDEA), School of Public Health, Imperial College London, London, United Kingdom
| | - Lily Geidelberg
- MRC Centre for Global Infectious Disease Analysis, Abdul Latif Jameel Institute for Disease and Emergency Analytics (J-IDEA), School of Public Health, Imperial College London, London, United Kingdom
| | - Kate M. Mitchell
- MRC Centre for Global Infectious Disease Analysis, Abdul Latif Jameel Institute for Disease and Emergency Analytics (J-IDEA), School of Public Health, Imperial College London, London, United Kingdom
| | - Sharmistha Mishra
- Department of Medicine, Division of Infectious Disease, University of Toronto, Toronto, Ontario, Canada
| | | | - Anna Bowring
- Department of Epidemiology, Johns Hopkins School of Public Health, Baltimore, MD
| | - Luc Béhanzin
- National School of Public Health and Epidemiological Surveillance workers, Parakou University, Bénin
| | - Fernand Guédou
- Free STI clinic, Cotonou Communal Health Center, Cotonou, Bénin
| | - Souleymane Diabaté
- Population Health and Optimal Health Practices, Québec University Hospital Research Center, Laval University, Québec, Quebec, Canada
| | - Sheree Schwartz
- Department of Epidemiology, Johns Hopkins School of Public Health, Baltimore, MD
| | - Serge C. Billong
- Department of Public Health, Faculty of Medicine and Biomedical Sciences, University of Yaoundé 1, Yaoundé, Cameroon
| | | | - Daniel Levitt
- HIV/AIDS Heath Equity and Rights, CARE USA, New York, NY
| | - Christinah Mukandavire
- Department of Infectious Disease Epidemiology, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Mathieu Maheu-Giroux
- Department of Epidemiology, Biostatistics, and Occupational Health, School of Population and Global Health, McGill University, Montréal, Quebec, Canada
| | - Minttu M. Rönn
- Department of Global Health and Population, Harvard T. H. Chan School of Public Health, Boston, MA
| | - Shona Dalal
- Department of HIV/AIDS, World Health Organization, Geneva, Switzerland; and
| | - Peter Vickerman
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, United Kingdom
| | - Stefan Baral
- Department of Epidemiology, Johns Hopkins School of Public Health, Baltimore, MD
| | - Michel Alary
- Population Health and Optimal Health Practices, Québec University Hospital Research Center, Laval University, Québec, Quebec, Canada
| | - Marie-Claude Boily
- MRC Centre for Global Infectious Disease Analysis, Abdul Latif Jameel Institute for Disease and Emergency Analytics (J-IDEA), School of Public Health, Imperial College London, London, United Kingdom
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19
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Mishra S, Silhol R, Knight J, Phaswana‐Mafuya R, Diouf D, Wang L, Schwartz S, Boily M, Baral S. Estimating the epidemic consequences of HIV prevention gaps among key populations. J Int AIDS Soc 2021; 24 Suppl 3:e25739. [PMID: 34189863 PMCID: PMC8242976 DOI: 10.1002/jia2.25739] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 04/22/2021] [Accepted: 04/28/2021] [Indexed: 11/07/2022] Open
Abstract
INTRODUCTION HIV epidemic appraisals are used to characterize heterogeneity and inequities in the context of the HIV pandemic and the response. However, classic measures used in appraisals have been shown to underestimate disproportionate risks of onward transmission, particularly among key populations. In response, a growing number of modelling studies have quantified the consequences of unmet prevention and treatment needs (prevention gaps) among key populations as a transmission population attributable fraction over time (tPAFt ). To aid its interpretation and use by programme implementers and policy makers, we outline and discuss a conceptual framework for understanding and estimating the tPAFt via transmission modelling as a measure of onward transmission risk from HIV prevention gaps; and discuss properties of the tPAFt . DISCUSSION The distribution of onward transmission risks may be defined by who is at disproportionate risk of onward transmission, and under which conditions. The latter reflects prevention gaps, including secondary prevention via treatment: the epidemic consequences of which may be quantified by the tPAFt . Steps to estimating the tPAFt include parameterizing the acquisition and onward transmission risks experienced by the subgroup of interest, defining the most relevant counterfactual scenario, and articulating the time-horizon of analyses and population among whom to estimate the relative difference in cumulative transmissions; such steps could reflect programme-relevant questions about onward transmission risks. Key properties of the tPAFt include larger onward transmission risks over longer time-horizons; seemingly mutually exclusive tPAFt measures summing to greater than 100%; an opportunity to quantify the magnitude of disproportionate onward transmission risks with a per-capita tPAFt ; and that estimates are conditional on what has been achieved so far in reducing prevention gaps and maintaining those conditions moving forward as the status quo. CONCLUSIONS The next generation of HIV epidemic appraisals has the potential to support a more specific HIV response by characterizing heterogeneity in disproportionate risks of onward transmission which are defined and conditioned on the past, current and future prevention gaps across subsets of the population.
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Affiliation(s)
- Sharmistha Mishra
- Department of MedicineUniversity of TorontoTorontoONCanada
- Institute of Medical SciencesUniversity of TorontoTorontoONCanada
- Institute of Health Policy, Management and EvaluationUniversity of TorontoTorontoOnCanada
- Li Ka Shing Knowledge InstituteSt. Michael’s HospitalUnity Health TorontoTorontoONCanada
| | - Romain Silhol
- MRC Centre for Global Infectious Disease AnalysisSchool of Public HealthImperial College LondonLondonUnited Kingdom
| | - Jesse Knight
- Institute of Medical SciencesUniversity of TorontoTorontoONCanada
- Li Ka Shing Knowledge InstituteSt. Michael’s HospitalUnity Health TorontoTorontoONCanada
| | | | | | - Linwei Wang
- Li Ka Shing Knowledge InstituteSt. Michael’s HospitalUnity Health TorontoTorontoONCanada
| | - Sheree Schwartz
- Department of EpidemiologyJohns Hopkins School of Public HealthBaltimoreMDUSA
| | - Marie‐Claude Boily
- MRC Centre for Global Infectious Disease AnalysisSchool of Public HealthImperial College LondonLondonUnited Kingdom
| | - Stefan Baral
- Department of EpidemiologyJohns Hopkins School of Public HealthBaltimoreMDUSA
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20
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Garnett GP. Reductions in HIV incidence are likely to increase the importance of key population programmes for HIV control in sub-Saharan Africa. J Int AIDS Soc 2021; 24 Suppl 3:e25727. [PMID: 34189844 PMCID: PMC8242973 DOI: 10.1002/jia2.25727] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2020] [Revised: 03/24/2021] [Accepted: 04/20/2021] [Indexed: 11/10/2022] Open
Abstract
INTRODUCTION An efficient HIV response requires that resources be focussed on effective interventions for those most at risk of acquiring and transmitting infection. As HIV epidemics evolve the distribution of HIV across key and other populations will change. Here, the epidemiological concepts underpinning these changes are described and the importance of appropriate allocation of effective interventions is discussed. DISCUSSION In many sub-Saharan African countries HIV epidemics have been categorized as "generalized," and HIV testing, treatment and prevention interventions have focussed on the "general" population. As HIV epidemics are better controlled the relative importance of "key" populations will increase, dominating the ongoing burden of disease and providing the potential for repeated outbreaks of HIV if interventions are relaxed. The basic reproductive number (R0 ) describes the potential for an infectious disease to spread at the boundary of invasion or elimination, whereas the effective reproduction number (Rt ) describes the current potential for spread. Heterogeneity in risk means that while Rt is temporarily below one and prevalence declining, the R0 can remain above one, preventing eventual elimination. Patterns of HIV acquisition are often used to guide interventions but inadequately capture the transmission dynamics of the virus and the most efficient approach to controlling HIV. Risks for HIV acquisition are not identical to risks for HIV transmission and will change depending on the epidemiological context. In addition to the challenges in measuring HIV transmission dynamics, there is a tension between using epidemiology to drive the HIV response and the social and political realities constraining how programmes and providers can practically and appropriately focus on key populations and maintain political support. In addition to being well focussed, interventions need to be effective and cost-effective, which requires a better understanding of packages of interventions rather than specific tools. CONCLUSIONS Continued control of HIV will increasingly rely on resources, programmes and interventions supporting key populations. Current epidemiological and programmatic approaches for key populations in sub-Saharan Africa are insufficient with a need for an improved understanding of local epidemiology and the effectiveness of interventions.
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Affiliation(s)
- Geoff P Garnett
- Tuberculosis and HIV Strategic TeamBill & Melinda Gates FoundationSeattleWAUSA
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21
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Nsanzimana S, Mills EJ, Harari O, Mugwaneza P, Karita E, Uwizihiwe JP, Park JJ, Dron L, Condo J, Bucher H, Thorlund K. Prevalence and incidence of HIV among female sex workers and their clients: modelling the potential effects of intervention in Rwanda. BMJ Glob Health 2021; 5:bmjgh-2020-002300. [PMID: 32764126 PMCID: PMC7412619 DOI: 10.1136/bmjgh-2020-002300] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 02/27/2020] [Accepted: 03/07/2020] [Indexed: 11/04/2022] Open
Abstract
BACKGROUND Rwanda has identified several targeted HIV prevention strategies, such as promotion of condom use and provision of antiretroviral therapy (ART) and pre-exposure prophylaxis (PrEP) for female sex workers (FSWs). Given this country's limited resources, understanding how the HIV epidemic will be affected by these strategies is crucial. METHODS We developed a Markov model to estimate the effects of targeted strategies to FSWs on the HIV prevalence/incidence in Rwanda from 2017 to 2027. Our model consists of the six states: HIV-; HIV+ undiagnosed/diagnosed pre-ART; HIV+ diagnosed with/without ART; and death. We considered three populations: FSWs, sex clients and the general population. For the period 2017-2027, the HIV epidemic among each of these population was estimated using Rwanda's demographic, sexual risk behaviour and HIV-associated morbidity and mortality data. RESULTS Between 2017 and 2027, with no changes in the current condom and ART use, the overall number of people living with HIV is expected to increase from 344,971 to 402,451. HIV incidence will also decrease from 1.36 to 1.20 100 person-years. By 2027, a 30% improvement in consistent condom use among FSWs will result in absolute reduction of HIV prevalence among FSWs, sex clients and the general population by 7.86%, 5.97% and 0.17%, respectively. While recurring HIV testing and improving the ART coverage mildly reduced the prevalence/incidence among FSWs and sex clients, worsening the two (shown by our worst-case scenario) will result in an increase in the HIV prevalence/incidence among FSWs and sex clients. Introduction of PrEP to FSWs in 2019 will reduce the HIV incidence among FSWs by 1.28%. CONCLUSIONS Continued efforts toward improving condom and ART use will be critical for Rwanda to continue their HIV epidemic control. Implementing a targeted intervention strategy in PrEP for FSWs will reduce the HIV epidemic in this high-risk population.
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Affiliation(s)
- Sabin Nsanzimana
- Rwanda Biomedical Center, Kigali, Rwanda .,Basel Institute for Clinical Epidemiology and Biostatistics, University of Basel, Basel, Switzerland
| | - Edward J Mills
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Canada, McMaster University, Hamilton, Ontario, Canada.,Real World and Advanced Analytics, Cytel Inc, Vancouver, BC, Canada
| | - Ofir Harari
- Real World and Advanced Analytics, Cytel Inc, Vancouver, BC, Canada
| | - Placidie Mugwaneza
- Institute for HIV, Diseases Prevention and Control, Rwanda Biomedical Center, Kigali, Rwanda
| | - Etienne Karita
- School of Medicine and Hubert Department of Global Health, Rollins School of Public Health, Emory University, Atlanta, United States
| | - Jean Paul Uwizihiwe
- School of Medicine and Pharmacy, Department of Primary Health Care, University of Rwanda, Kigali, Rwanda.,Department of Public Health, Center for Global Health, Aarhus University, Aarhus University, Aarhus, Denmark
| | - Jay Jh Park
- Real World and Advanced Analytics, Cytel Inc, Vancouver, BC, Canada.,Experimental Medicine, Department of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Louis Dron
- Real World and Advanced Analytics, Cytel Inc, Vancouver, BC, Canada
| | - Jeanine Condo
- School of Public Health, University of Rwanda, Kigali, Rwanda
| | - Heiner Bucher
- Basel Institute for Clinical Epidemiology and Biostatistics, University of Basel, Basel, Switzerland
| | - Kristian Thorlund
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Canada, McMaster University, Hamilton, Ontario, Canada.,Real World and Advanced Analytics, Cytel Inc, Vancouver, BC, Canada
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22
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d'Elbée M, Traore MM, Badiane K, Vautier A, Simo Fotso A, Kabemba OK, Rouveau N, Godfrey-Faussett P, Maheu-Giroux M, Boily MC, Medley GF, Larmarange J, Terris-Prestholt F. Costs and Scale-Up Costs of Integrating HIV Self-Testing Into Civil Society Organisation-Led Programmes for Key Populations in Côte d'Ivoire, Senegal, and Mali. Front Public Health 2021; 9:653612. [PMID: 34109146 PMCID: PMC8182047 DOI: 10.3389/fpubh.2021.653612] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Accepted: 04/26/2021] [Indexed: 11/13/2022] Open
Abstract
Despite significant progress on the proportion of individuals who know their HIV status in 2020, Côte d'Ivoire (76%), Senegal (78%), and Mali (48%) remain far below, and key populations (KP) including female sex workers (FSW), men who have sex with men (MSM), and people who use drugs (PWUD) are the most vulnerable groups with a HIV prevalence at 5-30%. HIV self-testing (HIVST), a process where a person collects his/her own specimen, performs a test, and interprets the result, was introduced in 2019 as a new testing modality through the ATLAS project coordinated by the international partner organisation Solthis (IPO). We estimate the costs of implementing HIVST through 23 civil society organisations (CSO)-led models for KP in Côte d'Ivoire (N = 7), Senegal (N = 11), and Mali (N = 5). We modelled costs for programme transition (2021) and early scale-up (2022-2023). Between July 2019 and September 2020, a total of 51,028, 14,472, and 34,353 HIVST kits were distributed in Côte d'Ivoire, Senegal, and Mali, respectively. Across countries, 64-80% of HIVST kits were distributed to FSW, 20-31% to MSM, and 5-8% to PWUD. Average costs per HIVST kit distributed were $15 for FSW (Côte d'Ivoire: $13, Senegal: $17, Mali: $16), $23 for MSM (Côte d'Ivoire: $15, Senegal: $27, Mali: $28), and $80 for PWUD (Côte d'Ivoire: $16, Senegal: $144), driven by personnel costs (47-78% of total costs), and HIVST kits costs (2-20%). Average costs at scale-up were $11 for FSW (Côte d'Ivoire: $9, Senegal: $13, Mali: $10), $16 for MSM (Côte d'Ivoire: $9, Senegal: $23, Mali: $17), and $32 for PWUD (Côte d'Ivoire: $14, Senegal: $50). Cost reductions were mainly explained by the spreading of IPO costs over higher HIVST distribution volumes and progressive IPO withdrawal at scale-up. In all countries, CSO-led HIVST kit provision to KP showed relatively high costs during the study period related to the progressive integration of the programme to CSO activities and contextual challenges (COVID-19 pandemic, country safety concerns). In transition to scale-up and integration of the HIVST programme into CSO activities, this model shows large potential for substantial economies of scale. Further research will assess the overall cost-effectiveness of this model.
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Affiliation(s)
- Marc d'Elbée
- Department of Global Health and Development, Faculty of Public Health and Policy, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | | | | | | | - Arlette Simo Fotso
- Centre Population et Développement (Ceped UMR 196), Institut de Recherche pour le Développement (IRD), Université de Paris, Inserm (ERL 1244), Paris, France
| | | | - Nicolas Rouveau
- Centre Population et Développement (Ceped UMR 196), Institut de Recherche pour le Développement (IRD), Université de Paris, Inserm (ERL 1244), Paris, France
| | - Peter Godfrey-Faussett
- Joint United Nations Programme on HIV/AIDS (UNAIDS), Geneva, Switzerland
- Clinical Research Department, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Mathieu Maheu-Giroux
- Department of Epidemiology, Biostatistics, and Occupational Health, School of Population and Global Health, McGill University, Montréal, QC, Canada
| | - Marie-Claude Boily
- Department of Infectious Disease Epidemiology, Medical Research Council Centre for Global Infectious Disease Analysis, Imperial College London, London, United Kingdom
| | - Graham Francis Medley
- Department of Global Health and Development, Faculty of Public Health and Policy, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Joseph Larmarange
- Centre Population et Développement (Ceped UMR 196), Institut de Recherche pour le Développement (IRD), Université de Paris, Inserm (ERL 1244), Paris, France
| | - Fern Terris-Prestholt
- Department of Global Health and Development, Faculty of Public Health and Policy, London School of Hygiene and Tropical Medicine, London, United Kingdom
- Joint United Nations Programme on HIV/AIDS (UNAIDS), Geneva, Switzerland
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Silhol R, Baral S, Bowring AL, Mukandavire C, Njindam IM, Rao A, Schwartz S, Tamoufe U, Billong SC, Njoya O, Zoung-Kanyi Bissek AC, Calleja JMG, Vickerman P, Mishra S, Boily MC. Quantifying the Evolving Contribution of HIV Interventions and Key Populations to the HIV Epidemic in Yaoundé, Cameroon. J Acquir Immune Defic Syndr 2021; 86:396-405. [PMID: 33234807 DOI: 10.1097/qai.0000000000002580] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Accepted: 11/04/2020] [Indexed: 12/12/2022]
Abstract
BACKGROUND Key populations (KP) including men who have sex with men (MSM), female sex workers (FSW), and their clients are disproportionately affected by HIV in Sub-Saharan Africa. We estimated the evolving impact of past interventions and contribution of unmet HIV prevention/treatment needs of key populations and lower-risk groups to HIV transmission. SETTING Yaoundé, Cameroon. METHODS We parametrized and fitted a deterministic HIV transmission model to Yaoundé-specific demographic, behavioral, HIV, and intervention coverage data in a Bayesian framework. We estimated the fraction of incident HIV infections averted by condoms and antiretroviral therapy (ART) and the fraction of all infections over 10-year periods directly and indirectly attributable to sex within and between each risk group. RESULTS Condom use and ART together may have averted 43% (95% uncertainty interval: 31-54) of incident infections over 1980-2018 and 72% (66-79) over 2009-2018. Most onward transmissions over 2009-2018 stemmed from sex between lower-risk individuals [47% (32-61)], clients [37% (23-51)], and MSM [35% (20-54)] with all their partners. The contribution of commercial sex decreased from 25% (8-49) over 1989-1998 to 8% (3-22) over 2009-2018, due to higher intervention coverage among FSW. CONCLUSION Condom use and recent ART scale-up mitigated the HIV epidemic in Yaoundé and changed the contribution of different partnerships to onward transmission over time. Findings highlight the importance of prioritizing HIV prevention and treatment for MSM and clients of FSW whose unmet needs now contribute most to onward transmission, while maintaining services that successfully reduced transmissions in the context of commercial sex.
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Affiliation(s)
- Romain Silhol
- Department of Infectious Disease Epidemiology, Imperial College London, HPTN Modelling Centre, London, United Kingdom
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, United Kingdom
| | - Stefan Baral
- Department of Epidemiology, Johns Hopkins School of Public Health, Baltimore, MD
| | - Anna L Bowring
- Department of Epidemiology, Johns Hopkins School of Public Health, Baltimore, MD
- Burnet Institute, Melbourne, Australia
| | - Christinah Mukandavire
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, United Kingdom
| | - Iliassou M Njindam
- Department of Epidemiology, Johns Hopkins School of Public Health, Baltimore, MD
| | - Amrita Rao
- Department of Epidemiology, Johns Hopkins School of Public Health, Baltimore, MD
| | - Sheree Schwartz
- Department of Epidemiology, Johns Hopkins School of Public Health, Baltimore, MD
| | - Ubald Tamoufe
- Department of Epidemiology, Johns Hopkins School of Public Health, Baltimore, MD
- Metabiota, Yaoundé, Cameroon
| | - Serge C Billong
- Department of Public Health, Faculty of Medicine and Biomedical Sciences, University of Yaoundé I, Yaoundé, Cameroon
- National AIDS Control Committee (NACC/CNLS), Yaoundé, Cameroon
| | - Oudou Njoya
- Department of Internal Medicine and Specialties, Faculty of Medicine and Biomedical Sciences, University of Yaoundé I, Yaoundé, Cameroon
| | - Anne-Cecile Zoung-Kanyi Bissek
- Department of Internal Medicine and Specialties, Faculty of Medicine and Biomedical Sciences, University of Yaoundé I, Yaoundé, Cameroon
- Division of Operations Research, Ministry of Health, Yaoundé, Cameroon
| | | | - Peter Vickerman
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, United Kingdom
| | - Sharmistha Mishra
- St. Michael's Hospital, Li Ka Shing Knowledge Institute, University of Toronto, Toronto, Canada; and
- Division of Infectious Disease, Department of Medicine, University of Toronto, Toronto, Canada
| | - Marie-Claude Boily
- Department of Infectious Disease Epidemiology, Imperial College London, HPTN Modelling Centre, London, United Kingdom
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, United Kingdom
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24
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Rouveau N, Ky-Zerbo O, Boye S, Fotso AS, d'Elbée M, Maheu-Giroux M, Silhol R, Kouassi AK, Vautier A, Doumenc-Aïdara C, Breton G, Keita A, Ehui E, Ndour CT, Boilly MC, Terris-Prestholt F, Pourette D, Desclaux A, Larmarange J. Describing, analysing and understanding the effects of the introduction of HIV self-testing in West Africa through the ATLAS programme in Côte d'Ivoire, Mali and Senegal. BMC Public Health 2021; 21:181. [PMID: 33478470 PMCID: PMC7818756 DOI: 10.1186/s12889-021-10212-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Accepted: 01/10/2021] [Indexed: 01/26/2023] Open
Abstract
BACKGROUND The ATLAS programme aims to promote and implement HIV self-testing (HIVST) in three West African countries: Côte d'Ivoire, Mali, and Senegal. During 2019-2021, in close collaboration with the national AIDS implementing partners and communities, ATLAS plans to distribute 500,000 HIVST kits through eight delivery channels, combining facility-based, community-based strategies, primary and secondary distribution of HIVST. Considering the characteristics of West African HIV epidemics, the targets of the ATLAS programme are hard-to-reach populations: key populations (female sex workers, men who have sex with men, and drug users), their clients or sexual partners, partners of people living with HIV and patients diagnosed with sexually transmitted infections and their partners. The ATLAS programme includes research support implementation to generate evidence for HIVST scale-up in West Africa. The main objective is to describe, analyse and understand the social, health, epidemiological effects and cost-effectiveness of HIVST introduction in Côte d'Ivoire, Mali and Senegal to improve the overall HIV testing strategy (accessibility, efficacy, ethics). METHODS ATLAS research is organised into five multidisciplinary workpackages (WPs): Key Populations WP: qualitative surveys (individual in-depth interviews, focus group discussions) conducted with key actors, key populations, and HIVST users. Index testing WP: ethnographic observation of three HIV care services introducing HIVST for partner testing. Coupons survey WP: an anonymous telephone survey of HIVST users. Cost study WP: incremental economic cost analysis of each delivery model using a top-down costing with programmatic data, complemented by a bottom-up costing of a representative sample of HIVST distribution sites, and a time-motion study for health professionals providing HIVST. Modelling WP: Adaptation, parameterisation and calibration of a dynamic compartmental model that considers the varied populations targeted by the ATLAS programme and the different testing modalities and strategies. DISCUSSION ATLAS is the first comprehensive study on HIV self-testing in West Africa. The ATLAS programme focuses particularly on the secondary distribution of HIVST. This protocol was approved by three national ethic committees and the WHO's Ethical Research Committee.
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Affiliation(s)
- Nicolas Rouveau
- Ceped (Centre Population & Développement UMR 196), IRD, Université de Paris, Inserm, Paris, France.
| | - Odette Ky-Zerbo
- Institut de Recherche pour le Développement, Transvihmi (UMI 233 IRD, 1175 INSERM, Montpellier University), Montpellier, France
| | - Sokhna Boye
- Ceped (Centre Population & Développement UMR 196), IRD, Université de Paris, Inserm, Paris, France
| | - Arlette Simo Fotso
- Ceped (Centre Population & Développement UMR 196), IRD, Université de Paris, Inserm, Paris, France
| | - Marc d'Elbée
- Department of Global Health and Development, Faculty of Public Health and Policy, London School of Hygiene and Tropical Medicine, London, UK
| | - Mathieu Maheu-Giroux
- Department of Epidemiology, Biostatistics, and Occupational Health, School of Population and Global Health, McGill University, Montréal, QC, H3A 1A2, Canada
| | - Romain Silhol
- Analysis Department of Infectious Disease Epidemiology, Medical Research Council Centre for Global Infectious Disease, Imperial College London, London, UK
| | - Arsène Kra Kouassi
- Ceped (Centre Population & Développement UMR 196), IRD, Université de Paris, Inserm, Paris, France
| | | | | | | | - Abdelaye Keita
- Institut National de Recherche en Santé Publique (INRSP), Bamako, Mali
| | - Eboi Ehui
- Programme National de Lutte contre le Sida, Abidjan, Côte d'Ivoire
| | - Cheikh Tidiane Ndour
- Division de Lutte contre le Sida et les IST, Ministère de la Santé et de l'Action sociale, Dakar, Sénégal
| | - Marie-Claude Boilly
- Analysis Department of Infectious Disease Epidemiology, Medical Research Council Centre for Global Infectious Disease, Imperial College London, London, UK
| | - Fern Terris-Prestholt
- Department of Global Health and Development, Faculty of Public Health and Policy, London School of Hygiene and Tropical Medicine, London, UK
| | - Dolorès Pourette
- Ceped (Centre Population & Développement UMR 196), IRD, Université de Paris, Inserm, Paris, France
| | - Alice Desclaux
- Institut de Recherche pour le Développement, Transvihmi (UMI 233 IRD, 1175 INSERM, Montpellier University), Montpellier, France.,CRCF, Dakar, Sénégal
| | - Joseph Larmarange
- Ceped (Centre Population & Développement UMR 196), IRD, Université de Paris, Inserm, Paris, France
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Understanding the HIV Epidemic Among MSM in Baltimore: A Modeling Study Estimating the Impact of Past HIV Interventions and Who Acquired and Contributed to Infections. J Acquir Immune Defic Syndr 2021; 84:253-262. [PMID: 32141958 PMCID: PMC8432604 DOI: 10.1097/qai.0000000000002340] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Supplemental Digital Content is Available in the Text. Men who have sex with men (MSM) in the United States are disproportionately affected by HIV. We estimated the impact of past interventions and contribution of different population groups to incident MSM HIV infections.
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Stone J, Mukandavire C, Boily M, Fraser H, Mishra S, Schwartz S, Rao A, Looker KJ, Quaife M, Terris‐Prestholt F, Marr A, Lane T, Coetzee J, Gray G, Otwombe K, Milovanovic M, Hausler H, Young K, Mcingana M, Ncedani M, Puren A, Hunt G, Kose Z, Phaswana‐Mafuya N, Baral S, Vickerman P. Estimating the contribution of key populations towards HIV transmission in South Africa. J Int AIDS Soc 2021; 24:e25650. [PMID: 33533115 PMCID: PMC7855076 DOI: 10.1002/jia2.25650] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 10/26/2020] [Accepted: 11/12/2020] [Indexed: 12/21/2022] Open
Abstract
INTRODUCTION In generalized epidemic settings, there is insufficient understanding of how the unmet HIV prevention and treatment needs of key populations (KPs), such as female sex workers (FSWs) and men who have sex with men (MSM), contribute to HIV transmission. In such settings, it is typically assumed that HIV transmission is driven by the general population. We estimated the contribution of commercial sex, sex between men, and other heterosexual partnerships to HIV transmission in South Africa (SA). METHODS We developed the "Key-Pop Model"; a dynamic transmission model of HIV among FSWs, their clients, MSM, and the broader population in SA. The model was parameterized and calibrated using demographic, behavioural and epidemiological data from national household surveys and KP surveys. We estimated the contribution of commercial sex, sex between men and sex among heterosexual partnerships of different sub-groups to HIV transmission over 2010 to 2019. We also estimated the efficiency (HIV infections averted per person-year of intervention) and prevented fraction (% IA) over 10-years from scaling-up ART (to 81% coverage) in different sub-populations from 2020. RESULTS Sex between FSWs and their paying clients, and between clients with their non-paying partners contributed 6.9% (95% credibility interval 4.5% to 9.3%) and 41.9% (35.1% to 53.2%) of new HIV infections in SA over 2010 to 2019 respectively. Sex between low-risk groups contributed 59.7% (47.6% to 68.5%), sex between men contributed 5.3% (2.3% to 14.1%) and sex between MSM and their female partners contributed 3.7% (1.6% to 9.8%). Going forward, the largest population-level impact on HIV transmission can be achieved from scaling up ART to clients of FSWs (% IA = 18.2% (14.0% to 24.4%) or low-risk individuals (% IA = 20.6% (14.7 to 27.5) over 2020 to 2030), with ART scale-up among KPs being most efficient. CONCLUSIONS Clients of FSWs play a fundamental role in HIV transmission in SA. Addressing the HIV prevention and treatment needs of KPs in generalized HIV epidemics is central to a comprehensive HIV response.
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Affiliation(s)
- Jack Stone
- Population Health SciencesUniversity of BristolBristolUnited Kingdom
| | - Christinah Mukandavire
- Department of Infectious Disease EpidemiologyLondon School of Hygiene and Tropical MedicineLondonUnited Kingdom
| | - Marie‐Claude Boily
- Department of Infectious Disease EpidemiologyImperial CollegeLondonUnited Kingdom
| | - Hannah Fraser
- Population Health SciencesUniversity of BristolBristolUnited Kingdom
| | | | - Sheree Schwartz
- Department of EpidemiologyJohns Hopkins Bloomberg School of Public HealthBaltimoreMDUSA
| | - Amrita Rao
- Department of EpidemiologyJohns Hopkins Bloomberg School of Public HealthBaltimoreMDUSA
| | | | - Matthew Quaife
- London School of Hygiene and Tropical MedicineLondonUnited Kingdom
| | | | - Alexander Marr
- University of California San FranciscoSan FranciscoCAUSA
| | - Tim Lane
- Equal InternationalWashingtonDCUSA
| | - Jenny Coetzee
- Perinatal HIV Research UnitFaculty of Health SciencesUniversity of the WitwatersrandJohannesburgSouth Africa
- South African Medical Research CouncilCape TownSouth Africa
| | - Glenda Gray
- South African Medical Research CouncilCape TownSouth Africa
| | - Kennedy Otwombe
- Perinatal HIV Research UnitFaculty of Health SciencesUniversity of the WitwatersrandJohannesburgSouth Africa
| | - Minja Milovanovic
- Perinatal HIV Research UnitFaculty of Health SciencesUniversity of the WitwatersrandJohannesburgSouth Africa
| | | | | | | | | | - Adrian Puren
- National Institute of Communicable DiseasesJohannesburgSouth Africa
| | - Gillian Hunt
- National Institute of Communicable DiseasesJohannesburgSouth Africa
| | - Zamakayise Kose
- Research and Innovation OfficeNorth West UniversityPotchefstroomSouth Africa
| | | | - Stefan Baral
- Department of EpidemiologyJohns Hopkins Bloomberg School of Public HealthBaltimoreMDUSA
| | - Peter Vickerman
- Population Health SciencesUniversity of BristolBristolUnited Kingdom
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Olawore O, Astatke H, Lillie T, Persaud N, Lyons C, Kamali D, Wilcher R, Baral S. Peer Recruitment Strategies for Female Sex Workers Not Engaged in HIV Prevention and Treatment Services in Côte d'Ivoire: Program Data Analysis. JMIR Public Health Surveill 2020; 6:e18000. [PMID: 33001039 PMCID: PMC7563635 DOI: 10.2196/18000] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 08/07/2020] [Accepted: 08/20/2020] [Indexed: 02/02/2023] Open
Abstract
Background In the context of the mostly generalized HIV epidemic in Côte d’Ivoire, key populations bear a higher burden of HIV than that borne by the general reproductive-aged population. Mathematical models have demonstrated the significant potential impact and cost-effectiveness of improving the coverage of HIV prevention and treatment services for key populations in Côte d’Ivoire. However, in 2019, coverage of these services remained limited by multiple intersecting stigmas affecting key populations, necessitating the study of innovative implementation strategies to better meet the needs of those most marginalized. Here, we leverage programmatic data to compare the effectiveness of the enhanced and traditional peer outreach approaches in reaching and providing community HIV testing to female sex workers not readily engaged in HIV prevention and treatment services in Côte d’Ivoire. Objective The aim of this study was to describe the characteristics of female sex workers reached by the LINKAGES project in Côte d’Ivoire with enhanced peer outreach and traditional peer outreach and to compare HIV-related outcomes between the women reached by both strategies. Methods Deidentified routine programmatic data collected as part of LINKAGES Côte d’Ivoire between October 2017 and April 2018 were used in these analyses. Demographic characteristics and HIV indicators including HIV testing history, HIV case-finding, linkage to HIV treatment, and treatment initiation were assessed using descriptive statistics. Differences in these indicators were compared by outreach strategy using Pearson chi-square tests. Results There were 9761 women reached with enhanced peer outreach and routine peer outreach included in these analyses. The overall case-finding rate in the sample was 7.8% (698/8851). Compared with women reached by routine outreach, those reached by enhanced peer outreach were more likely to have previously been tested for HIV (enhanced: 1695/2509, 67.6%; routine: 4302/7252, 60.0%; χ21=43.8; P=.001). The enhanced peer outreach approach was associated with a higher HIV case-finding rate (enhanced: 269/2507 10.7%; routine: 429/6344, 6.8%; χ21=32.3; P=.001), higher proportion of linkage to treatment (enhanced: 258/269, 95.9%; routine: 306/429, 71.3%; χ21=64.4; P=.001), and higher proportion of treatment initiation (enhanced: 212/269, 78.8%; routine: 315/429, 73.3%; χ21=2.6; P=.11). Women reached by both approaches were categorized as high risk for HIV-related behaviors such as condomless sex and number of sex acts in the previous week. Conclusions These analyses suggest that the novel peer-referral strategy, the enhanced peer outreach approach, was effective in reaching female sex workeres in Côte d’Ivoire with demonstrated acquisition risks for HIV and who had not been effectively engaged by routine outreach approaches. Scaling up novel strategies such as enhanced peer outreach in the context of differentiated service models may be needed to optimize HIV prevention and treatment outcomes for key populations in Côte d’Ivoire.
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Affiliation(s)
- Oluwasolape Olawore
- Department of Epidemiology, Johns Hopkins School of Public Health, Baltimore, MD, United States
| | | | | | | | - Carrie Lyons
- Department of Epidemiology, Johns Hopkins School of Public Health, Baltimore, MD, United States
| | | | | | - Stefan Baral
- Department of Epidemiology, Johns Hopkins School of Public Health, Baltimore, MD, United States
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Hakim AJ, Bolo A, Werner M, Achut V, Katoro J, Caesar G, Lako R, Taban AI, Wesson J, Okiria AG. High HIV and syphilis prevalence among female sex workers in Juba, South Sudan. PLoS One 2020; 15:e0239543. [PMID: 32986767 PMCID: PMC7521730 DOI: 10.1371/journal.pone.0239543] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Accepted: 09/08/2020] [Indexed: 11/24/2022] Open
Abstract
HIV prevalence is estimated to be 2.7% in South Sudan; however, little is known about the young country’s epidemic. We conducted a respondent-driven sampling biobehavioral survey in Juba of female sex workers (FSW) aged ≥15 years who sold or exchanged sex in the last 6 months to learn more about this population. We enrolled 838 FSW from November 2015 to March 2016 and estimated HIV prevalence to be 37.8%. Prevalence of active syphilis was 7.3%. FSW were from South Sudan and most neighboring countries. Comprehensive knowledge of HIV was 11.1% and 64.2% of FSW had never spoken with an outreach worker. In multivariable analysis, HIV was associated with being from Uganda (aOR: 3.3, 95% CI: 1.7–6.1) or Kenya (aOR: 4.3, 95% CI: 1.5–13.0) versus from South Sudan. Our survey suggests that FSW may play a critical role in South Sudan’s HIV epidemic and highlights the importance of tailoring services to the unique needs of FSW of all nationalities in Juba.
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Affiliation(s)
- Avi J. Hakim
- Division of Global HIV and TB, US Centers for Disease Control and Prevention, Atlanta, GA, United States of America
- * E-mail:
| | - Alex Bolo
- Division of Global HIV and TB, US Centers for Disease Control and Prevention, Atlanta, GA, United States of America
| | - Margaret Werner
- Division of Global HIV and TB, US Centers for Disease Control and Prevention, Atlanta, GA, United States of America
| | | | - Joel Katoro
- Division of Global HIV and TB, US Centers for Disease Control and Prevention, Atlanta, GA, United States of America
| | - Golda Caesar
- South Sudan Ministry of Health, Juba, South Sudan
| | - Richard Lako
- South Sudan Ministry of Health, Juba, South Sudan
| | | | - Jennifer Wesson
- IntraHealth International, Chapel Hill, NC, United States of America
| | - Alfred G. Okiria
- IntraHealth International, Chapel Hill, NC, United States of America
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Knight J, Baral SD, Schwartz S, Wang L, Ma H, Young K, Hausler H, Mishra S. Contribution of high risk groups' unmet needs may be underestimated in epidemic models without risk turnover: A mechanistic modelling analysis. Infect Dis Model 2020; 5:549-562. [PMID: 32913937 PMCID: PMC7452422 DOI: 10.1016/j.idm.2020.07.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 07/13/2020] [Accepted: 07/17/2020] [Indexed: 12/24/2022] Open
Abstract
Background Epidemic models of sexually transmitted infections (STIs) are often used to characterize the contribution of risk groups to overall transmission by projecting the transmission population attributable fraction (tPAF) of unmet prevention and treatment needs within risk groups. However, evidence suggests that STI risk is dynamic over an individual’s sexual life course, which manifests as turnover between risk groups. We sought to examine the mechanisms by which turnover influences modelled projections of the tPAF of high risk groups. Methods We developed a unifying, data-guided framework to simulate risk group turnover in deterministic, compartmental transmission models. We applied the framework to an illustrative model of an STI and examined the mechanisms by which risk group turnover influenced equilibrium prevalence across risk groups. We then fit a model with and without turnover to the same risk-stratified STI prevalence targets and compared the inferred level of risk heterogeneity and tPAF of the highest risk group projected by the two models. Results The influence of turnover on group-specific prevalence was mediated by three main phenomena: movement of previously high risk individuals with the infection into lower risk groups; changes to herd effect in the highest risk group; and changes in the number of partnerships where transmission can occur. Faster turnover led to a smaller ratio of STI prevalence between the highest and lowest risk groups. Compared to the fitted model without turnover, the fitted model with turnover inferred greater risk heterogeneity and consistently projected a larger tPAF of the highest risk group over time. Implications If turnover is not captured in epidemic models, the projected contribution of high risk groups, and thus, the potential impact of prioritizing interventions to address their needs, could be underestimated. To aid the next generation of tPAF models, data collection efforts to parameterize risk group turnover should be prioritized. A new framework for parameterizing turnover in risk groups is developed. Mechanisms by which turnover influences sexually transmitted infection (STI), prevalence in risk groups are examined. Turnover reduces the ratio of equilibrium STI prevalence in high vs low risk groups. Inferred risk heterogeneity is higher when fitting transmission models with turnover. Ignoring turnover in risk could underestimate the transmission population attributable fraction (tPAF), of high risk groups to the overall epidemic.
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Affiliation(s)
- Jesse Knight
- MAP Centre for Urban Health Solutions, Unity Health Toronto, Canada
| | - Stefan D Baral
- Deptartment of Epidemiology, Johns Hopkins Bloomberg School of Public Health, USA
| | - Sheree Schwartz
- Deptartment of Epidemiology, Johns Hopkins Bloomberg School of Public Health, USA
| | - Linwei Wang
- MAP Centre for Urban Health Solutions, Unity Health Toronto, Canada
| | - Huiting Ma
- MAP Centre for Urban Health Solutions, Unity Health Toronto, Canada
| | | | | | - Sharmistha Mishra
- MAP Centre for Urban Health Solutions, Unity Health Toronto, Canada.,Division of Infectious Disease, Department of Medicine, University of Toronto, Canada.,Institute of Health Policy, Management and Evaluation, Dalla Lana School of Public Health, University of Toronto, Canada.,Institute of Medical Sciences, University of Toronto, Canada
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Abstract
Purpose of review To explore the comparative importance of HIV infections among key populations and their intimate partners as HIV epidemics evolve, and to review implications for guiding responses. Recent findings Even as concentrated epidemics evolve, new infections among current and former key population members and their intimate partners dominate new infections. Prevalent infections in the general population grow primarily because of key population turnover and infections among their intimate partners. In generalized epidemic settings, data and analysis on key populations are often inadequate to assess the impact of key population-focused responses, so they remain limited in coverage and under resourced. Models must incorporate downstream infections in comparing impacts of alternative responses. Summary Recognize that every epidemic is unique, moving beyond the overly simplistic concentrated/generalized epidemic paradigm that can misdirect resources. Guide HIV responses by gathering and using locally relevant data, understanding risk heterogeneity, and applying modeling at both national and sub-national levels to optimize resource allocations among different populations for greatest impact. Translate this improved understanding into clear, unequivocal advice for policymakers on where to focus for impact, breaking them free of the generalized/concentrated paradigm limiting their thinking and affecting their decisions.
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Abstract
BACKGROUND Despite Côte d'Ivoire epidemic being labeled as "generalized," key populations (KPs) are important to overall transmission. Using a dynamic model of HIV transmission, we previously estimated the impact of several treatment-as-prevention strategies that reached-or missed-the UNAIDS 90-90-90 targets in different populations groups, including KP and clients of female sex workers (CFSWs). To inform program planning and resources allocation, we assessed the cost-effectiveness of these scenarios. METHODS Costing was performed from the provider's perspective. Unit costs were obtained from the Ivorian Programme national de lutte contre le Sida (USD 2015) and discounted at 3%. Net incremental cost-effectiveness ratios (ICER) per adult HIV infection prevented and per disability-adjusted life-years (DALY) averted were estimated over 2015-2030. RESULTS The 3 most cost-effective and affordable scenarios were the ones that projected current programmatic trends [ICER = $210; 90% uncertainty interval (90% UI): $150-$300], attaining the 90-90-90 objectives among KP and CFSW (ICER = $220; 90% UI: $80-$510), and among KP only (ICER = $290; 90% UI: $90-$660). The least cost-effective scenario was the one that reached the UNAIDS 90-90-90 target accompanied by a 25% point drop in condom use in KP (ICER = $710; 90% UI: $450-$1270). In comparison, the UNAIDS scenario had a net ICER of $570 (90% UI: $390-$900) per DALY averted. CONCLUSIONS According to commonly used thresholds, accelerating the HIV response can be considered very cost-effective for all scenarios. However, when balancing epidemiological impact, cost-effectiveness, and affordability, scenarios that sustain both high condom use and rates of viral suppression among KP and CFSW seem most promising in Côte d'Ivoire.
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Maheu-Giroux M, Marsh K, Doyle CM, Godin A, Lanièce Delaunay C, Johnson LF, Jahn A, Abo K, Mbofana F, Boily MC, Buckeridge DL, Hankins CA, Eaton JW. National HIV testing and diagnosis coverage in sub-Saharan Africa: a new modeling tool for estimating the 'first 90' from program and survey data. AIDS 2019; 33 Suppl 3:S255-S269. [PMID: 31764066 PMCID: PMC6919235 DOI: 10.1097/qad.0000000000002386] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Revised: 05/20/2019] [Accepted: 09/19/2019] [Indexed: 11/26/2022]
Abstract
OBJECTIVE HIV testing services (HTS) are a crucial component of national HIV responses. Learning one's HIV diagnosis is the entry point to accessing life-saving antiretroviral treatment and care. Recognizing the critical role of HTS, the Joint United Nations Programme on HIV/AIDS (UNAIDS) launched the 90-90-90 targets stipulating that by 2020, 90% of people living with HIV know their status, 90% of those who know their status receive antiretroviral therapy, and 90% of those on treatment have a suppressed viral load. Countries will need to regularly monitor progress on these three indicators. Estimating the proportion of people living with HIV who know their status (i.e. the 'first 90'), however, is difficult. METHODS We developed a mathematical model (henceforth referred to as 'Shiny90') that formally synthesizes population-based survey and HTS program data to estimate HIV status awareness over time. The proposed model uses country-specific HIV epidemic parameters from the standard UNAIDS Spectrum model to produce outputs that are consistent with other national HIV estimates. Shiny90 provides estimates of HIV testing history, diagnosis rates, and knowledge of HIV status by age and sex. We validate Shiny90 using both in-sample comparisons and out-of-sample predictions using data from three countries: Côte d'Ivoire, Malawi, and Mozambique. RESULTS In-sample comparisons suggest that Shiny90 can accurately reproduce longitudinal sex-specific trends in HIV testing. Out-of-sample predictions of the fraction of people living with HIV ever tested over a 4-to-6-year time horizon are also in good agreement with empirical survey estimates. Importantly, out-of-sample predictions of HIV knowledge of status are consistent (i.e. within 4% points) with those of the fully calibrated model in the three countries when HTS program data are included. The model's predictions of knowledge of status are higher than available self-reported HIV awareness estimates, however, suggesting - in line with previous studies - that these self-reports could be affected by nondisclosure of HIV status awareness. CONCLUSION Knowledge of HIV status is a key indicator to monitor progress, identify bottlenecks, and target HIV responses. Shiny90 can help countries track progress towards their 'first 90' by leveraging surveys of HIV testing behaviors and annual HTS program data.
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Affiliation(s)
- Mathieu Maheu-Giroux
- Department of Epidemiology, Biostatistics, and Occupational Health, School of Population and Global Health, McGill University, Montréal, Canada
| | - Kimberly Marsh
- The Joint United Nations Programme on HIV/AIDS (UNAIDS), Geneva, Switzerland
| | - Carla M. Doyle
- Department of Epidemiology, Biostatistics, and Occupational Health, School of Population and Global Health, McGill University, Montréal, Canada
| | - Arnaud Godin
- Department of Epidemiology, Biostatistics, and Occupational Health, School of Population and Global Health, McGill University, Montréal, Canada
| | - Charlotte Lanièce Delaunay
- Department of Epidemiology, Biostatistics, and Occupational Health, School of Population and Global Health, McGill University, Montréal, Canada
| | - Leigh F. Johnson
- Centre for Infectious Disease Epidemiology and Research, University of Cape Town, Cape Town, South Africa
| | - Andreas Jahn
- Ministry of Health, Lilongwe, Malawi and I-TECH, Department of Global Health, University of Washington, Seattle, USA
| | - Kouamé Abo
- Programme national de lutte contre le Sida, Abidjan, Côte d’Ivoire
| | | | - Marie-Claude Boily
- Department of Infectious Disease Epidemiology, Imperial College London, St Mary's Hospital, London, UK
| | - David L. Buckeridge
- Department of Epidemiology, Biostatistics, and Occupational Health, School of Population and Global Health, McGill University, Montréal, Canada
| | - Catherine A. Hankins
- Department of Epidemiology, Biostatistics, and Occupational Health, School of Population and Global Health, McGill University, Montréal, Canada
| | - Jeffrey W. Eaton
- Department of Infectious Disease Epidemiology, Imperial College London, St Mary's Hospital, London, UK
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Bekelynck A, Larmarange J. Pepfar 3.0's HIV testing policy in Côte d'Ivoire (2014 to 2018): fragmentation, acceleration and disconnection. J Int AIDS Soc 2019; 22:e25424. [PMID: 31854504 PMCID: PMC6921083 DOI: 10.1002/jia2.25424] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Accepted: 11/14/2019] [Indexed: 12/31/2022] Open
Abstract
INTRODUCTION HIV Testing and Counselling (HTC) remains a key challenge in achieving control of the HIV epidemic by 2030. In the early 2010s, the President's Emergency Plan for AIDS Relief (Pepfar) adopted targeted HTC strategies for populations and geographical areas most affected by HIV. We examine how Pepfar defined targeted HTC in Côte d'Ivoire, a country with a mixed HIV epidemic, after a decade of expanding HTC services. METHODS We explored the evolution of HTC strategies through the Country Operational Plans (COP) of Pepfar during its phase 3.0, from COP 14 to COP 17 (October 2014 to September 2018) in Côte d'Ivoire. We conducted an analysis of the grey literature over the period 2014 to 2018 (Budget & Target Report, Strategic Direction Summary, Sustainability Index and Dashboard Summary, https://data.pepfar.gov). We also conducted a qualitative study in Côte d'Ivoire (2015 to 2018) using in-depth interviews with stakeholders in the AIDS public response: CDC/Pepfar (3), Ministry of Health (3), intermediary NGOs (7); and public meeting observations (14). RESULTS Since the COP 14, Pepfar's HIV testing strategies have been characterized by significant variations in terms of numerical, geographical and population targets. While the aim of COP 14 and COP 15 seemed to be the improvement of testing efficacy in general and testing yield in particular, COP 16 and COP 17 prioritized accelerating progress towards the "first 90" (i.e. reducing the proportion of people living with HIV who are unaware of their HIV). A shift was observed in the definition of testing targets, with less focus on the inclusion of programmatic data and feedback from field actors, and greater emphasis on the use of models to estimate and disaggregate the targets by geographical units and sub-populations (even if the availability of data by this disaggregation was limited or uncertain); increasingly leading to gaps between targets and results. CONCLUSIONS These trials and tribulations question the real and long-term effectiveness of annually-revised, fragmented strategies, which widen an increasing disparity between the realities of the actors on the ground and the objectives set in Washington.
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Affiliation(s)
- Anne Bekelynck
- PAC‐CI/ANRS Research Site ProgramTreichville University HospitalAbidjanIvory Coast
- Centre Population et Développement (Ceped)Université Paris Descartes, IRD, InsermParisFrance
| | - Joseph Larmarange
- Centre Population et Développement (Ceped)Université Paris Descartes, IRD, InsermParisFrance
- Institut de Recherche et Développement (IRD)ParisFrance
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Mukandavire C, Walker J, Schwartz S, Boily M, Danon L, Lyons C, Diouf D, Liestman B, Diouf NL, Drame F, Coly K, Muhire RSM, Thiam S, Diallo PAN, Kane CT, Ndour C, Volz E, Mishra S, Baral S, Vickerman P. Estimating the contribution of key populations towards the spread of HIV in Dakar, Senegal. J Int AIDS Soc 2018; 21 Suppl 5:e25126. [PMID: 30033604 PMCID: PMC6055131 DOI: 10.1002/jia2.25126] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Accepted: 05/16/2018] [Indexed: 11/11/2022] Open
Abstract
INTRODUCTION Key populations including female sex workers (FSW) and men who have sex with men (MSM) bear a disproportionate burden of HIV. However, the role of focusing prevention efforts on these groups for reducing a country's HIV epidemic is debated. We estimate the extent to which HIV transmission among FSW and MSM contributes to overall HIV transmission in Dakar, Senegal, using a dynamic assessment of the population attributable fraction (PAF). METHODS A dynamic transmission model of HIV among FSW, their clients, MSM and the lower-risk adult population was parameterized and calibrated within a Bayesian framework using setting-specific demographic, behavioural, HIV epidemiological and antiretroviral treatment (ART) coverage data for 1985 to 2015. We used the model to estimate the 10-year PAF of commercial sex between FSW and their clients, and sex between men, to overall HIV transmission (defined as the percentage of new infections prevented when these modes of transmission are removed). In addition, we estimated the prevention benefits associated with historical increases in condom use and ART uptake, and impact of further increases in prevention and treatment. RESULTS The model projections suggest that unprotected sex between men contributed to 42% (2.5 to 97.5th percentile range 24 to 59%) of transmissions between 1995 and 2005, increasing to 64% (37 to 79%) from 2015 to 2025. The 10-year PAF of commercial sex is smaller, diminishing from 21% (7 to 39%) in 1995 to 14% (5 to 35%) in 2015. Without ART, 49% (32 to 71%) more HIV infections would have occurred since 2000, when ART was initiated, whereas without condom use since 1985, 67% (27 to 179%) more HIV infections would have occurred, and the overall HIV prevalence would have been 60% (29 to 211%) greater than what it is now. Further large decreases in HIV incidence (68%) can be achieved by scaling up ART in MSM to 74% coverage and reducing their susceptibility to HIV by two-thirds through any prevention modality. CONCLUSIONS Unprotected sex between men may be an important contributor to HIV transmission in Dakar, due to suboptimal coverage of evidence-informed interventions. Although existing interventions have effectively reduced HIV transmission among adults, it is crucial that further strategies address the unmet need among MSM.
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Affiliation(s)
| | - Josephine Walker
- Population Health Sciences, Bristol Medical SchoolUniversity of BristolBristolUK
| | - Sheree Schwartz
- Department of EpidemiologyJohns Hopkins Bloomberg School of Public HealthBaltimoreMDUSA
| | | | - Leon Danon
- Population Health Sciences, Bristol Medical SchoolUniversity of BristolBristolUK
- College of Engineering, Mathematics and Physical SciencesUniversity of ExeterExeterUK
| | - Carrie Lyons
- Department of EpidemiologyJohns Hopkins Bloomberg School of Public HealthBaltimoreMDUSA
| | | | - Ben Liestman
- Department of EpidemiologyJohns Hopkins Bloomberg School of Public HealthBaltimoreMDUSA
| | - Nafissatou Leye Diouf
- Institut de Recherche en Santéde Surveillance Epidemiologique et de FormationsDakarSenegal
| | | | - Karleen Coly
- Department of EpidemiologyJohns Hopkins Bloomberg School of Public HealthBaltimoreMDUSA
| | | | - Safiatou Thiam
- Department of HealthNational AIDS Council of SenegalDakarSenegal
| | | | - Coumba Toure Kane
- Institut de Recherche en Santéde Surveillance Epidemiologique et de FormationsDakarSenegal
| | - Cheikh Ndour
- Division de La Lutte Contre Le Sida et Les ISTMinistry of HealthDakarSenegal
| | - Erik Volz
- Department of Infectious Disease EpidemiologyImperial CollegeLondonUK
| | | | - Stefan Baral
- Department of Infectious Disease EpidemiologyImperial CollegeLondonUK
| | - Peter Vickerman
- Population Health Sciences, Bristol Medical SchoolUniversity of BristolBristolUK
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Knowledge, attitudes and practices of health personnel of maternities in the prevention of mother-to-child transmission of HIV in a sub-Saharan African region with high transmission rate: some solutions proposed. BMC Pregnancy Childbirth 2018; 18:227. [PMID: 29898688 PMCID: PMC6000955 DOI: 10.1186/s12884-018-1876-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Accepted: 05/31/2018] [Indexed: 11/19/2022] Open
Abstract
Background High mother-to-child (MTC) transmission rate of HIV might contribute to the increased pandemic rate. The aim of this study was to identify the knowledge, attitude and practices of health personnel working in maternities in the prevention of MTC transmission of HIV. Methods This cross-sectional descriptive study was carried out from 20th February to 30th April, 2017. All health personnel working in the maternity wards were included in this study. The variables recorded included their age, grade, experience (number of year of practice), gender, educational level, health structure and the training in prevention of MTC transmission of HIV. Analyses were done using SPSS 21.0. The Pearson Chi-square test or Fisher’s exact test and logistic regression were used for comparison. The level of significance was P < 0.05. Results A total of 140 health personnel were recruited. Knowledge was insufficient amongst 73 of them (52.1%). The factors significantly associated with sufficient knowledge were midwifery qualification (aOR 9.01, 95% CI 1.82–48.60) and training in prevention of MTC transmission of HIV (aOR 2.23, 95% CI 1.02–4.81). Regarding attitudes, it was negative in 85 practitioners (60.7%). Only those aged ≥33 years were significantly associated with a positive attitude (aOR 2.34, 95% CI 1.14–4.23). As concerns practices, only 32 practitioners (22.9%) had good practices. Only midwives were associated with good practices (aOR 3.23, 95% CI 1.21–9.95). Conclusion Insufficient knowledge, attitude and practices in the prevention of MTC transmission of HIV were observed among the majority of health personnel in the region. This lack of knowledge in prevention can therefore contribute to the rise of the mother-to-child transmission rate of HIV. To reduce this rate, more health personnel should be trained, especially midwives, in the prevention of MTC transmission of HIV. Moreover, deliveries of all women living with HIV should be conducted or at least supervised by trained midwives, especially those of at least 33 years of age. Electronic supplementary material The online version of this article (10.1186/s12884-018-1876-0) contains supplementary material, which is available to authorized users.
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Maheu-Giroux M, Baral S, Vesga JF, Diouf D, Diabaté S, Alary M, Abo K, Boily MC. Anal Intercourse Among Female Sex Workers in Côte d'Ivoire: Prevalence, Determinants, and Model-Based Estimates of the Population-Level Impact on HIV Transmission. Am J Epidemiol 2018. [PMID: 28633387 DOI: 10.1093/aje/kwx244] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Current evidence suggests that anal intercourse (AI) during sex work is common in sub-Saharan Africa, but there have been few studies in which the contribution of heterosexual AI to human immunodeficiency virus (HIV) epidemics has been investigated. Using a respondent-driven sampling survey of female sex workers (FSWs; n = 466) in Abidjan, Côte d'Ivoire, in 2014, we estimated AI prevalence and frequency. Poisson regressions were used to identify AI determinants. Approximately 20% of FSWs engaged in AI during a normal week (95% confidence interval: 15, 26). Women who performed AI were generally younger, had been selling sex for longer, were born in Côte d'Ivoire, and reported higher sex-work income, more frequent sex in public places, and violence from clients than women not reporting AI. Condom use was lower, condom breakage/slippage more frequent, and use of water-based lubricants was less frequently reported for AI than for vaginal intercourse. Using a dynamic transmission model, we estimated that 22% (95% credible interval: 11, 37% of new HIV infections could have been averted among FSWs during 2000-2015 if AI had been substituted for vaginal intercourse. Despite representing a small fraction of all sex acts, AI is an underestimated source of HIV transmission. Increasing availability and uptake of condoms, lubricants, and pre-exposure prophylaxis for women engaging in AI could help mitigate HIV risk.
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Affiliation(s)
- Mathieu Maheu-Giroux
- Department of Epidemiology, Biostatistics, and Occupational Health, McGill University, Montréal, Canada
| | - Stefan Baral
- Key Populations Program, Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Juan F Vesga
- Department of Infectious Disease Epidemiology, Imperial College London, St Mary’s Hospital, London, United Kingdom
| | | | - Souleymane Diabaté
- Centre de recherche du CHU de Québec–Université Laval, Ville de Québec, Canada
- Département d’infectiologie et santé publique, Université Alassane Ouattara, Bouaké, Côte d’Ivoire
| | - Michel Alary
- Centre de recherche du CHU de Québec–Université Laval, Ville de Québec, Canada
- Département de médecine sociale et préventive, Université Laval, Ville de Québec, Canada
- Institut national de santé publique du Québec, Ville de Québec, Canada
| | - Kouamé Abo
- Programme National de Lutte Contre le SIDA, Ministère de la santé et de l’hygiène publique, Abidjan, Côte d’Ivoire
| | - Marie-Claude Boily
- Department of Infectious Disease Epidemiology, Imperial College London, St Mary’s Hospital, London, United Kingdom
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Maheu-Giroux M, Vesga JF, Diabaté S, Alary M, Baral S, Diouf D, Abo K, Boily MC. Population-level impact of an accelerated HIV response plan to reach the UNAIDS 90-90-90 target in Côte d'Ivoire: Insights from mathematical modeling. PLoS Med 2017; 14:e1002321. [PMID: 28617810 PMCID: PMC5472267 DOI: 10.1371/journal.pmed.1002321] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Accepted: 05/09/2017] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND National responses will need to be markedly accelerated to achieve the ambitious target of the Joint United Nations Programme on HIV/AIDS (UNAIDS). This target aims for 90% of HIV-positive individuals to be aware of their status, for 90% of those aware to receive antiretroviral therapy (ART), and for 90% of those on treatment to have a suppressed viral load by 2020, with each individual target reaching 95% by 2030. We aimed to estimate the impact of various treatment-as-prevention scenarios in Côte d'Ivoire, one of the countries with the highest HIV incidence in West Africa, with unmet HIV prevention and treatment needs, and where key populations are important to the broader HIV epidemic. METHODS AND FINDINGS An age-stratified dynamic model was developed and calibrated to epidemiological and programmatic data using a Bayesian framework. The model represents sexual and vertical HIV transmission in the general population, female sex workers (FSW), and men who have sex with men (MSM). We estimated the impact of scaling up interventions to reach the UNAIDS targets, as well as the impact of 8 other scenarios, on HIV transmission in adults and children, compared to our baseline scenario that maintains 2015 rates of testing, ART initiation, ART discontinuation, treatment failure, and levels of condom use. In 2015, we estimated that 52% (95% credible intervals: 46%-58%) of HIV-positive individuals were aware of their status, 72% (57%-82%) of those aware were on ART, and 77% (74%-79%) of those on ART were virologically suppressed. Reaching the UNAIDS targets on time would avert 50% (42%-60%) of new HIV infections over 2015-2030 compared to 30% (25%-36%) if the 90-90-90 target is reached in 2025. Attaining the UNAIDS targets in FSW, their clients, and MSM (but not in the rest of the population) would avert a similar fraction of new infections (30%; 21%-39%). A 25-percentage-point drop in condom use from the 2015 levels among FSW and MSM would reduce the impact of reaching the UNAIDS targets, with 38% (26%-51%) of infections averted. The study's main limitation is that homogenous spatial coverage of interventions was assumed, and future lines of inquiry should examine how geographical prioritization could affect HIV transmission. CONCLUSIONS Maximizing the impact of the UNAIDS targets will require rapid scale-up of interventions, particularly testing, ART initiation, and limiting ART discontinuation. Reaching clients of FSW, as well as key populations, can efficiently reduce transmission. Sustaining the high condom-use levels among key populations should remain an important prevention pillar.
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Affiliation(s)
- Mathieu Maheu-Giroux
- Department of Epidemiology, Biostatistics, and Occupational Health, McGill University, Montréal, Québec, Canada
- * E-mail:
| | - Juan F. Vesga
- Department of Infectious Disease Epidemiology, Imperial College London, St Mary’s Hospital, London, United Kingdom
| | - Souleymane Diabaté
- Centre de recherche du CHU de Québec - Université Laval, Québec, Canada
- Département d’infectiologie et santé publique, Université Alassane Ouattara, Bouaké, Côte d’Ivoire
| | - Michel Alary
- Centre de recherche du CHU de Québec - Université Laval, Québec, Canada
- Département de médecine sociale et préventive, Université Laval, Québec, Canada
- Institut national de santé publique du Québec, Québec, Canada
| | - Stefan Baral
- Key Populations Program, Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, United States of America
| | | | - Kouamé Abo
- Programme National de Lutte contre le SIDA, Ministère de la Santé et de l’Hygiène Publique, Abidjan, Côte d’Ivoire
| | - Marie-Claude Boily
- Department of Infectious Disease Epidemiology, Imperial College London, St Mary’s Hospital, London, United Kingdom
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Kirakoya-Samadoulougou F, Jean K, Maheu-Giroux M. Uptake of HIV testing in Burkina Faso: an assessment of individual and community-level determinants. BMC Public Health 2017; 17:486. [PMID: 28532440 PMCID: PMC5441086 DOI: 10.1186/s12889-017-4417-2] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Accepted: 05/12/2017] [Indexed: 01/01/2023] Open
Abstract
Background Previous studies have highlighted a range of individual determinants associated with HIV testing but few have assessed the role of contextual factors. The objective of this paper is to examine the influence of both individual and community-level determinants of HIV testing uptake in Burkina Faso. Methods Using nationally representative cross-sectional data from the 2010 Demographic and Health Survey, the determinants of lifetime HIV testing were examined for sexually active women (n = 14,656) and men (n = 5680) using modified Poisson regression models. Results One third of women (36%; 95% Confidence Interval (CI): 33–37%) reported having ever been tested for HIV compared to a quarter of men (26%; 95% CI: 24–27%). For both genders, age, education, religious affiliation, household wealth, employment, media exposure, sexual behaviors, and HIV knowledge were associated with HIV testing. After adjustment, women living in communities where the following characteristics were higher than the median were more likely to report uptake of HIV testing: knowledge of where to access testing (Prevalence Ratio [PR] = 1.41; 95% CI: 1.34–1.48), willing to buy food from an infected vendor (PR = 2.06; 95% CI: 1.31–3.24), highest wealth quintiles (PR = 1.18; 95% CI: 1.10–1.27), not working year-round (PR = 0.90; 95% CI: 0.84–0.96), and high media exposure (PR = 1.11; 95% CI: 1.03–1.19). Men living in communities where the proportion of respondents were more educated (PR = 1.23; 95% CI: 1.07–1.41) than the median were more likely to be tested. Conclusions This study shed light on potential mechanisms through which HIV testing could be increased in Burkina Faso. Both individual and contextual factors should be considered to design effective strategies for scaling-up HIV testing.
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Affiliation(s)
- Fati Kirakoya-Samadoulougou
- Centre de Recherche en Epidémiologie, Biostatistiques et Recherche Clinique, École de Santé Publique, Université Libre de Bruxelles, Brussels, Belgium.
| | - Kévin Jean
- Department of Infectious Disease Epidemiology, Imperial College London, St Mary's Hospital, London, UK.,Laboratoire MESuRS (EA 4628), Conservatoire National des Arts et Métiers, Paris, France.,Conservatoire National des Arts et Métiers, Unité PACRI, Institut Pasteur, Paris, France
| | - Mathieu Maheu-Giroux
- Department of Epidemiology, Biostatistics, and Occupational Health, McGill University, Montréal, Canada
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