RESUMEN

INTRODUCTION: HIV pre-exposure prophylaxis (PrEP) has been recommended and partly subsidized in Québec, Canada, since 2013. We evaluated the population-level impact of PrEP on HIV transmission among men who have sex with men (MSM) in Montréal, Québec's largest city, over 2013-2021. METHODS: We used an agent-based mathematical model of sexual HIV transmission to estimate the fraction of HIV acquisitions averted by PrEP compared to a counterfactual scenario without PrEP. The model was calibrated to local MSM survey, surveillance, and cohort data and accounted for COVID-19 pandemic impacts on sexual activity, HIV prevention, and care. PrEP was modelled from 2013 onwards, assuming 86% individual-level effectiveness. The PrEP eligibility criteria were: any anal sex unprotected by condoms (past 6 months) and either multiple partnerships (past 6 months) or multiple uses of post-exposure prophylaxis (lifetime). To assess potential optimization strategies, we modelled hypothetical scenarios prioritizing PrEP to MSM with high sexual activity (≥11 anal sex partners annually) or aged ⩽45 years, increasing coverage to levels achieved in Vancouver, Canada (where PrEP is free-of-charge), and improving retention. RESULTS: Over 2013-2021, the estimated annual HIV incidence decreased from 0.4 (90% credible interval [CrI]: 0.3-0.6) to 0.2 (90% CrI: 0.1-0.2) per 100 person-years. PrEP coverage among HIV-negative MSM remained low until 2015 (<1%). Afterwards, coverage increased to a maximum of 10% of all HIV-negative MSM, or about 16% of the 62% PrEP-eligible HIV-negative MSM in 2020. Over 2015-2021, PrEP averted an estimated 20% (90% CrI: 11%-30%) of cumulative HIV acquisitions. The hypothetical scenarios modelled showed that, at the same coverage level, prioritizing PrEP to high sexual activity MSM could have averted 30% (90% CrI: 19%-42%) of HIV acquisitions from 2015-2021. Even larger impacts could have resulted from higher coverage. Under the provincial eligibility criteria, reaching 10% coverage among HIV-negative MSM in 2015 and 30% in 2019, like attained in Vancouver, could have averted up to 63% (90% CrI: 54%-70%) of HIV acquisitions from 2015 to 2021. CONCLUSIONS: PrEP reduced population-level HIV transmission among Montréal MSM. However, our study suggests missed prevention opportunities and adds support for public policies that reduce PrEP barriers, financial or otherwise, to MSM at risk of HIV acquisition.

Asunto(s)

Fármacos Anti-VIH , Infecciones por VIH , Profilaxis Pre-Exposición , Minorías Sexuales y de Género , Masculino , Humanos , Anciano , Homosexualidad Masculina , Infecciones por VIH/epidemiología , Infecciones por VIH/prevención & control , Profilaxis Pre-Exposición/métodos , Pandemias , Conducta Sexual , Canadá/epidemiología , Fármacos Anti-VIH/uso terapéutico

RESUMEN

Using repeated behavioural surveillance data collected from gay and bisexual men (GBM) across Australia, we assessed trends in HIV prevention coverage (the level of 'safe sex' achieved in the population by the use of effective prevention methods, including condoms, pre-exposure prophylaxis [PrEP] and having an undetectable viral load). We stratified these trends by age, country of birth/recency of arrival, sexual identity, and the proportion of gay residents in the participant's suburb. Among 25,865 participants with casual male partners, HIV prevention coverage increased from 69.8% in 2017 to 75.2% in 2021, lower than the UNAIDS target of 95%. Higher levels of coverage were achieved among older GBM (≥ 45 years), non-recently-arrived migrants, and in suburbs with ≥ 10% gay residents. The lowest levels of prevention coverage (and highest levels of HIV risk) were recorded among younger GBM (< 25 years) and bisexual and other-identified participants. Younger, recently-arrived, and bisexual GBM were the most likely to use condoms, while PrEP use was concentrated among gay men, 25-44-year-olds, and in suburbs with more gay residents. The use of undetectable viral load was most common among participants aged ≥ 45 years. Our analysis shows that high HIV prevention coverage can be achieved through a mixture of condom use, PrEP use, and undetectable viral load, or by emphasising PrEP use. In the Australian context, younger, bisexual and other-identified GBM should be prioritised for enhanced access to effective HIV prevention methods. We encourage other jurisdictions to assess the level of coverage achieved by combination prevention, and variations in uptake.

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RESUMEN: Utilizando datos repetidos de vigilancia conductual recopilados de hombres homosexuales y bisexuales (GBM) en toda Australia, evaluamos las tendencias en la cobertura de la prevención del VIH (el nivel de "sexo seguro" logrado en la población mediante el uso de métodos de prevención eficaces, incluyendo condones, Profilaxis de Pre-Exposición al VIH [PrEP] y tener una carga viral indetectable). Estratificamos estas tendencias por edad, país de nacimiento/tiempo desde la llegada al país, identidad sexual y proporción de residentes homosexuales en el suburbio del participante. Entre 25.865 participantes con parejas masculinas ocasionales, la cobertura de prevención del VIH aumentó del 69,8% en 2017 al 75,2% en 2021, cifra inferior al objetivo de ONUSIDA del 95%. Se lograron niveles más altos de cobertura entre GBM de mayor edad (≥45 años), inmigrantes no llegados recientemente y en suburbios con ≥10% de residentes homosexuales. Los niveles más bajos de cobertura de prevención (y los niveles más altos de riesgo de VIH) se registraron entre los GBM más jóvenes (<25 años) y los participantes bisexuales y con otras identidades. Los GBM más jóvenes, recién llegados y bisexuales fueron los más propensos a usar condones, mientras que el uso de PrEP se concentró entre hombres homosexuales, de 25 a 44 años, y en los suburbios con más residentes homosexuales. El uso de carga viral indetectable fue más común entre los participantes de ≥45 años. Nuestro análisis demuestra que se puede lograr una alta cobertura de prevención del VIH mediante una combinación del uso de condón, uso de PrEP y carga viral indetectable, o enfatizando el uso de PrEP. En el contexto australiano, se debe dar prioridad a los GBM más jóvenes, bisexuales y con otras identidades para mejorar el acceso a métodos eficaces de prevención del VIH. Alentamos a otras jurisdicciones a evaluar el nivel de cobertura logrado mediante la prevención combinada y las variaciones en la adopción.

RESUMEN

BACKGROUND: In countries with mature generalized HIV epidemics such as Uganda, there are still groups of individuals that are disproportionately affected. Among the key populations in Uganda are fishing communities, which make up about 10% of the population. Compared to the general population, HIV prevalence and incidence among individuals living in these communities is high. This high HIV burden has been attributed to several factors including limited access to prevention and treatment services as well as ongoing high-risk sexual behaviour. METHODS: We investigated the impact of combined HIV prevention interventions on HIV transmission dynamics in high-risk fishing communities in Uganda using a deterministic compartmental model. The model was calibrated to seroprevalence data from a census performed in 2014. To account for remaining uncertainty in the calibrated model parameters, 50 000 simulated scenarios were modelled to investigate the impact of combined prevention interventions. RESULTS: The projected HIV incidence decreased from 1.87 per 100 PY without intervention scale-up to 0.25 per 100 PY after 15 years (2014-2029) of intervention scale-up. A potential combination achieving this 87% reduction in incidence over 15 years in Ugandan FCs included condom use in about 60% of sexual acts, 23% of susceptible men circumcised, 87% of people living with HIV aware of their status, 75% of those on ART, and about 3% of susceptible individuals on oral PrEP. Uncertainty analysis revealed relative reductions in incidence ranging from 30.9 to 86.8%. Sensitivity analyses suggested that condom use and early ART were the most important interventions. CONCLUSION: Reducing HIV incidence, as well as prevalence and AIDS-related mortality, in these high-risk fishing communities in Uganda is attainable over 15 years with a combination prevention package. Our projected intervention coverage levels are well within the national targets set by the Uganda government and enable coming close to reaching the UNAIDS 95-95-95 targets to end AIDS as a public health threat by 2030.

Asunto(s)

Síndrome de Inmunodeficiencia Adquirida , Infecciones por VIH , Masculino , Humanos , Síndrome de Inmunodeficiencia Adquirida/epidemiología , Infecciones por VIH/epidemiología , Infecciones por VIH/prevención & control , Uganda/epidemiología , Estudios Seroepidemiológicos , Caza

RESUMEN

Background: We reviewed a combination prevention program to strengthen HIV prevention programming, community support mechanisms, community-based HIV testing, referral systems, and HIV prevention integration at the primary care level. The intervention included situational analysis to inform programming, community engagement and mobilization, and community-based biomedical and behavioral prevention. In support of PEPFAR's country-ownership paradigm, we costed the combination HIV prevention program to determine data needed for local ownership. This research used costing and health system perspectives. Results: Cost per person reached with individual or small group prevention interventions ranged from $63.93 to $4,344.88. (cost per health facility strengthened). Personnel costs drove the intervention. This was true regardless of year or activity (i.e. wellness days or events, primary health care strengthening, community engagement, and wellness clubs). Conclusions: Labor-intensive rather than capital-intensive interventions for low-income settings, like this one, are important for treating and preventing HIV/AIDS and other health conditions sustainably. Over time, costs shifted from international cost centers to in-country headquarters offices, as required for sustainable PEPFAR initiatives. Such costing center evolution reflected changes in the intervention's composition, including (1) the redesign and re-deployment of service delivery sites according to local needs, uptake, and implementation success and (2) the flexible and adaptable restructuring of intervention components in response to community needs.

RESUMEN

BACKGROUND: The HIV pandemic impacts the lives of millions and despite the global coordinated response, innovative actions are still needed to end it. A major challenge is the added burden of coinfections such as viral hepatitis, tuberculosis and various sexually transmitted infections in terms of prevention, treatment and increased morbidity in individuals with HIV infection. A need for combination prevention strategies, tailored to high-risk key populations arises and technology-based interventions can be a valuable asset. The COVID-19 pandemic challenged the delivery of existing services and added stress to existing public health and clinical structures but also highlighted the potential of exploiting technical solutions for interventions regarding infectious diseases. In this paper we report the design process, results and evaluation findings from the pilots of 'RiskRadar'-a web and mobile application aiming to support combination prevention, testing and linkage to care for HIV, viral hepatitis, various sexually transmitted infections and tuberculosis. METHODS: RiskRadar was developed for the INTEGRATE Joint Action's aim to improve, adapt and pilot innovative digital tools for combination prevention. RiskRadar was designed iteratively using informed end-user-oriented approaches. Emphasis was placed on the Risk Calculator that enables users to assess their risk of exposure to one or more of the four disease areas, make informed decisions to seek testing or care and adjust their behaviours ultimately aiming to harm/risk reduction. RiskRadar has been piloted in three countries, namely Croatia, Italy and Lithuania. RESULTS: RiskRadar has been used 1347 times across all platforms so far. More than 90% of users have found RiskRadar useful and would use it again, especially the Risk Calculator component. Almost 49.25% are men and 29.85% are in the age group of 25-34. The application has scored 5.2/7 in the User Experience Questionnaire, where it is mainly described as "supportive" and "easy-to-use". The qualitative evaluation of RiskRadar also yielded positive feedback. CONCLUSIONS: Pilot results demonstrate above average satisfaction with RiskRadar and high user-reported usability scores, supporting the idea that technical interventions could significantly support combination prevention actions on Sexually Transmitted Infections.

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COVID-19 , Infecciones por VIH , Hepatitis Viral Humana , Enfermedades de Transmisión Sexual , Tuberculosis , Adulto , Infecciones por VIH/epidemiología , Infecciones por VIH/prevención & control , Hepatitis Viral Humana/epidemiología , Hepatitis Viral Humana/prevención & control , Humanos , Masculino , Pandemias , SARS-CoV-2 , Enfermedades de Transmisión Sexual/epidemiología , Enfermedades de Transmisión Sexual/prevención & control , Tuberculosis/prevención & control

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BACKGROUND: Evidence suggests that migration increases vulnerability to human immunodeficiency virus (HIV) and other sexually transmitted infections (STI). However, there is limited knowledge about what has been done or needs to be done to address migrants' vulnerability in receiving countries. OBJECTIVES: A scoping review was carried out to map the existing literature in this field, describe its characteristics, identify gaps in knowledge and determine whether a Sexual and Reproductive Health and Rights (SRHR)-perspective was applied. METHODS: We used the Arksey and O'Malley framework and the Joanna Briggs Institute guidelines for scoping reviews and subsequent enhancements proposed by other authors. We searched three databases and grey literature to identify relevant publications. RESULTS: A total of 1,147 records were found across the three electronic databases and compiled. Of these, only 29 papers that met the inclusion criteria were included. The review shows that research in this field is dominated by studies from the USA that mostly include behavioural interventions for HIV and HBV prevention among migrants from Latin America and Asian countries, respectively. None of the interventions integrated an SRHR perspective. The intervention effects varied across studies and measured outcomes. The observed effects on knowledge, attitudes, perceptions, behavioural intentions and skills were largely positive, but reported effects on testing and sexual risk behaviours were inconsistent. CONCLUSIONS: There is a need for good quality research, particularly in parts of the world other than the USA that will address all STIs and specifically target the most vulnerable subgroups of migrants. Further research requires greater scope and depth, including the need to apply an SRHR perspective and incorporate biomedical and structural interventions to address the interacting causes of migrants' vulnerability to HIV/STIs.

Asunto(s)

Infecciones por VIH , Enfermedades de Transmisión Sexual , Migrantes , Infecciones por VIH/prevención & control , Humanos , Salud Reproductiva , Conducta Sexual , Enfermedades de Transmisión Sexual/prevención & control

RESUMEN

The 56 Dean Street combination prevention model, a strong engagement with the LGBTQI community and flexible services adapted to users' changing needs led to an 80% drop in HIV diagnoses in gay, bisexual and other men who have sex with men (GBMSM) from 2015 to 2017. We describe the service changes at 56 Dean Street since 2012 which resulted in an increase in the frequency of HIV testing, the introduction of pre-exposure prophylaxis, earlier HIV diagnosis and a shorter time to viral suppression in those living with HIV. This model could be adapted to deliver similar results in those settings of high HIV prevalence among GBMSM and where access to technological innovation in healthcare and engagement with the community can be achieved.

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Infecciones por VIH , Profilaxis Pre-Exposición , Minorías Sexuales y de Género , Bisexualidad , Infecciones por VIH/tratamiento farmacológico , Homosexualidad Masculina , Humanos , Masculino , Profilaxis Pre-Exposición/métodos

RESUMEN

The present study evaluates a combination prevention intervention for crack users in San Salvador, El Salvador that included social network HIV testing, community events and small group interventions. We examined the cumulative effects of the social network HIV testing and small group interventions on rates of HIV testing, beyond the increase that we saw with the introduction of the social network HIV testing intervention alone. HIV test data was converted into the number of daily tests and analyzed the immediate and overtime impact of small group interventions during and in the twelve weeks after the small group intervention. The addition of the small group interventions to the baseline of monthly HIV tests resulted in increased rates of testing lasting 7 days after the small group interventions suggesting a reinforcing effect of small group interventions on testing rates.

Asunto(s)

Cocaína Crack , Infecciones por VIH , El Salvador/epidemiología , Infecciones por VIH/diagnóstico , Infecciones por VIH/epidemiología , Infecciones por VIH/prevención & control , Prueba de VIH , Humanos , Red Social

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Infecciones por VIH , Profilaxis Pre-Exposición , VIH , Infecciones por VIH/prevención & control , Humanos , Modelos Teóricos , Piridonas

RESUMEN

PURPOSE OF REVIEW: Antiretroviral treatment (ART) can dramatically reduce the risk of HIV transmission, but the feasibility of scaling up HIV testing, linkage and treatment to very high population levels, and its impact on population HIV incidence, were unknown. We review key findings from a community-randomized trial in which we evaluated the impact of "universal test and treat" (UTT) on population HIV incidence in Botswana, a resource-constrained country with both high HIV prevalence and high ART coverage before study inception. RECENT FINDINGS: We conducted a community-randomized trial (the "Ya Tsie" trial or Botswana Combination Prevention Project (BCPP)) in 30 villages in Botswana from 2013 to 2018, with the goal of determining whether a combination of prevention interventions-with a focus on universal HIV testing and treatment-would reduce population-level HIV incidence. The intervention included universal HIV testing (home-based and mobile), active linkage to HIV care and treatment with patient tracing for persons not linking, universal ART coverage, rapid ART start (at the first clinic visit), and enhanced male circumcision services. Botswana had very high HIV diagnosis, treatment, and viral suppression levels (approaching the UNAIDS "90-90-90" targets) prior to intervention roll-out. By study end, we were able to exceed the overall 95-95-95 coverage target of 86%: an estimated 88% of all persons living with HIV were on ART and had viral suppression in the Ya Tsie intervention arm. In addition, annual HIV incidence was 30% lower in the intervention arm as compared with the control arm over a 29-month follow-up period. With universal HIV testing and relatively simple linkage activities, it was possible to achieve one of the highest reported population levels of HIV diagnosis, linkage to care, and viral suppression globally and to reduce population HIV incidence by about one-third over a short period of time (< 3 years). We were able to significantly increase population viral suppression and to decrease HIV incidence even in a resource-constrained setting with pre-existing very high testing and treatment coverage. Universal community-based HIV testing and tracing of individuals through the HIV care cascade were key intervention components.

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Infecciones por VIH/diagnóstico , Infecciones por VIH/prevención & control , Prueba de VIH/métodos , Tamizaje Masivo/métodos , Salud Pública/métodos , Adulto , Antirretrovirales/uso terapéutico , Botswana , Circuncisión Masculina , Trazado de Contacto/métodos , Femenino , Infecciones por VIH/tratamiento farmacológico , Humanos , Incidencia , Masculino , Prevalencia

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Online digital tools are considered an innovative method to promote HIV, hepatitis and STIs prevention, testing and treatment services, overcoming individual and social barriers, especially for younger people and other, possibly hard-to-reach, target population groups. In this paper, we introduce INTEGRATE RiskRadar, a web and mobile application developed in the scope of the EU-supported INTEGRATE Joint Action (JA), that aims to enhance the integration of combination prevention, testing and linkage to care for HIV, hepatitis, STIs and tuberculosis by providing integrated information and digital tools regarding all four diseases to population groups at increased risk, aiming to eliminate the individual and social barriers to effective adoption of prevention practices, testing and linkage to care, and thus reduce the incidence and burden of these diseases in the European Region.

Asunto(s)

Infecciones por VIH , Hepatitis , Enfermedades de Transmisión Sexual , Tuberculosis , Europa (Continente) , Infecciones por VIH/diagnóstico , Infecciones por VIH/prevención & control , Hepatitis/diagnóstico , Hepatitis/prevención & control , Humanos , Enfermedades de Transmisión Sexual/diagnóstico , Enfermedades de Transmisión Sexual/prevención & control , Programas Informáticos , Tuberculosis/diagnóstico , Tuberculosis/prevención & control

RESUMEN

Hypoxic pulmonary hypertension (HPH) is a fatal disease with limited therapeutic strategies. Combination therapy is regarded as the standard of care in PH and becoming widely used in clinical practice. However, many PH patients treated with combinations of available clinical drugs still have a poor prognosis. Therefore, identifying innovative therapeutic strategies is essential for PH. This study is designed to examine the effects of combined prevention with resveratrol and SR1001 on HPH in rats. The effects of combined prevention with resveratrol and SR1001 and each mono-prevention on the development of HPH, Th17 cells differentiation, expression of guanine nucleotide exchange factor-H1 (GEF-H1), Ras homolog gene family member A (RhoA) and Phosphorylated myosin phosphatase target subunit (MYPT1) were examined. HPH and RV hypertrophy occurred in rats exposed to hypoxia. Compared with normoxia group, the hypoxia group showed significantly increased ratio of Th17 cells. After treatment with resveratrol, HPH rats showed an obvious reduction of Th17 cells. SR1001 significantly reduced the increased p-MYPY1, RhoA, and GEF-H1 expression in the hypoxic rats. The mono-prevention with resveratrol or SR1001 significantly inhibited the Th17 cells differentiation, p-STAT3, p-MYPY1, RhoA, and GEF-H1 protein expression, which was further inhibited by their combination prevention. The combination of resveratrol and SR1001 has a synergistic interaction, suggesting that combined use of these pharmacological targets may be an alternative to exert further beneficial effects on HPH.

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Hipertensión Pulmonar , Resveratrol/farmacología , Sulfonamidas/farmacología , Tiazoles/farmacología , Animales , Sinergismo Farmacológico , Quimioterapia Combinada , Inhibidores Enzimáticos/farmacología , Hipertensión Pulmonar/etiología , Hipertensión Pulmonar/metabolismo , Hipertensión Pulmonar/prevención & control , Hipoxia/complicaciones , Hipoxia/metabolismo , Masculino , Proteína Fosfatasa 1/metabolismo , Arteria Pulmonar/efectos de los fármacos , Ratas , Células Th17/efectos de los fármacos , Células Th17/fisiología , Resultado del Tratamiento , Proteína de Unión al GTP rhoA/metabolismo

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INTRODUCTION: Oral pre-exposure prophylaxis (PrEP) is a new form of HIV prevention being considered for inclusion in national prevention portfolios. Many mathematical modelling studies have been undertaken that speak to the impact, cost and cost-effectiveness of PrEP programmes. We assess the available evidence from mathematical modelling studies to inform programme planning and policy decision making for PrEP and further research directions. METHODS: We conducted a scoping review of the published modelling literature. Articles published in English which modelled oral PrEP in sub-Saharan Africa, or non-specific settings with relevance to generalized HIV epidemic settings, were included. Data were extracted for the strategies of PrEP use modelled, and the impact, cost and cost-effectiveness of PrEP for each strategy. We define an algorithm to assess the quality and relevance of studies included, summarize the available evidence and identify the current gaps in modelling. Recommendations are generated for future modelling applications and data collection. RESULTS AND DISCUSSION: We reviewed 1924 abstracts and included 44 studies spanning 2007 to 2017. Modelling has reported that PrEP can be a cost-effective addition to HIV prevention portfolios for some use cases, but also that it would not be cost-effective to fund PrEP before other prevention interventions are expanded. However, our assessment of the quality of the modelling indicates cost-effectiveness analyses failed to comply with standards of reporting for economic evaluations and the assessment of relevance highlighted that both key parameters and scenarios are now outdated. Current evidence gaps include modelling to inform service development using updated programmatic information and ex post modelling to evaluate and inform efficient deployment of resources in support of PrEP, especially among key populations, using direct evidence of cost, adherence and uptake patterns. CONCLUSIONS: Updated modelling which more appropriately captures PrEP programme delivery, uses current intervention scenarios, and is parameterized with data from demonstration and implementation projects is needed in support of more conclusive findings and actionable recommendations for programmes and policy. Future analyses should address these issues, aligning with countries to support the needs of programme planners and decision makers for models to more directly inform programme planning and policy.

Asunto(s)

Infecciones por VIH/prevención & control , Costos de la Atención en Salud , Profilaxis Pre-Exposición/economía , Fármacos Anti-VIH/uso terapéutico , Análisis Costo-Beneficio , Humanos , Modelos Teóricos

RESUMEN

INTRODUCTION: Recent years have witnessed a rapid expansion of efficacious biomedical HIV prevention technologies. Promising as they may be, they are largely delivered through standard, clinic-based models, often in isolation from structural and behavioural interventions. This contributes to varied, and often poor, uptake and adherence. There is a critical need to develop analytical tools that can advance our understandings and responses to the combination of interventions that affect engagement with HIV prevention technologies. This commentary makes a call for practice-based combination HIV prevention analysis and action, and presents a tool to facilitate this challenging but crucial endeavour. DISCUSSION: Models and frameworks for combination HIV prevention already exist, but the process of identifying precisely what multi-level factors that need to be considered as part of a combination of HIV interventions for particular populations and settings is unclear. Drawing on contemporary social practice theory, this paper develops a "table of questioning" to help interrogate the chain and combination of multi-level factors that shape engagement with HIV prevention technologies. The tool also supports an examination of other shared social practices, which at different levels, and in different ways, affect engagement with HIV prevention technologies. It facilitates an analysis of the range of factors and social practices that need to be synchronized in order to establish engagement with HIV prevention technologies as a possible and desirable thing to do. Such analysis can help uncover local hitherto un-identified issues and provide a platform for novel synergistic approaches for action that are not otherwise obvious. The tool is discussed in relation to PrEP among adolescent girls and young women in sub-Saharan Africa. CONCLUSIONS: By treating engagement with HIV prevention technologies as a social practice and site of analysis and public health action, HIV prevention service planners and evaluators can identify and respond to the combination of factors and social practices that interact to form the context that supports or prohibits engagement with HIV prevention technologies for particular populations.

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Fármacos Anti-VIH/uso terapéutico , Infecciones por VIH/prevención & control , Profilaxis Pre-Exposición , Femenino , Humanos

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BACKGROUND: The emergence of biomedical and seroadaptive HIV prevention strategies has coincided with a decline in condom use among gay men. METHODS: We undertook a social ecological analysis of condom use and perceptions using nineteen semi-structured interviews with HIV negative gay men in Vancouver, Canada who used HAART-based prevention strategies. RESULTS: Contributors to inconsistent condom use were found at various levels of the social ecological model. Ongoing concern regarding HIV transmission and belief in the proven efficacy of condoms motivated contextual use. When condoms were not used, participants utilized seroadaptive and biomedical prevention strategies to mitigate risk. CONCLUSIONS: These findings indicate that notions of "safety" and "risk" based on consistent condom use are eroding as other modes of prevention gain visibility. Community-based and public health interventions will need to shift prevention messaging from advocacy for universal condom use toward combination prevention in order to meet gay men's current prevention needs. Interventions should advance gay men's communication and self-advocacy skills in order to optimize these strategies.

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Condones/estadística & datos numéricos , Infecciones por VIH/prevención & control , Homosexualidad Masculina/psicología , Adulto , Terapia Antirretroviral Altamente Activa/estadística & datos numéricos , Canadá , Homosexualidad Masculina/estadística & datos numéricos , Humanos , Masculino , Persona de Mediana Edad , Percepción

RESUMEN

As políticas globais e nacional de resposta à Aids têm enfatizado atualmente o tratamento como prevenção, as profilaxias pós e pré-exposição ao HIV e a prevenção combinada. O artigo analisa a tradução dessas políticas no âmbito local, com base em uma pesquisa social em municípios da região metropolitana do Rio de Janeiro centrada no contexto programático de prevenção e cuidado do HIV/Aids e na vulnerabilidade ao HIV de gays, travestis e prostitutas. Os hiatos entre as diretrizes e os contextos locais são abordados a partir de quatro temas: ampliação da oferta de testagem; desafios das ações focalizadas; distância entre testar e tratar; e o alcance das combinações na prevenção combinada. Buscamos demonstrar a importância da compreensão dos processos sociais que perpassam a implementação das estratégias preconizadas globalmente, que precisam ainda ser consideradas no enfrentamento da epidemia.(AU)

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Global and national AIDS response policies emphasize treatment as prevention, pre and post- exposure prophylaxis, and combination prevention. This article analyzes the implementation of such policies at local level drawing on the findings of a social study conducted in municipalities in the metropolitan region of Rio de Janeiro , Brasil, centered on HIV/AIDS prevention and care and the vulnerability of gays, transvestites, and prostitutes. The gaps between policy and local action are addressed focusing on four issues: the expansion of HIV testing, challenges facing targeted actions, the distance between testing and treatment, and the reach of combinations in combination prevention. We demonstrate the importance of understanding the social processes that cut across the implementation of the global recommendations and guidelines and suggest that these processes must to be taken into account to effectively tackle the HIV/AIDS epidemic.(AU)

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Las políticas globales y nacional de respuesta al Sida han enfatizado actualmente el tratamiento como prevención, las profilaxis post y preexposición al VIH y la prevención combinada. El artículo analiza la traducción de esas políticas en el ámbito local, con base en una investigación social en municipios de la región metropolitana de Río de Janeiro, Brasil, centrada en el contexto programático de prevención y cuidado del VIH/Sida y la vulnerabilidad al VIH de gais, travestis y prostitutas. Los hiatos entre las directrices y los contextos locales se abordan a partir de cuatro temas: ampliación de la oferta de testes, desafíos de las acciones focalizadas, la distancia entre el teste y el tratamiento y el alcance de las combinaciones en la prevención combinada. Buscamos demostrar la importancia de la comprensión de los procesos sociales presentes en la implementación de las estrategias preconizadas globalmente que todavía tienen que llevarse en consideración en el enfrentamiento de la epidemia.(AU)

RESUMEN

BACKGROUND: Global Health Initiatives (GHIs) have been instrumental in the rapid acceleration of HIV prevention, treatment access, and availability of care and support services for people living with HIV (PLH) in low and middle income countries (LMIC). These efforts have increasingly used combination prevention approaches that include biomedical, behavioral, social and structural interventions to reduce HIV incidence. However, little research has evaluated their implementation. We report results of qualitative research to examine the implementation of a national HIV combination prevention strategy in El Salvador funded by the Global Fund to Fight AIDS, Tuberculosis and Malaria. METHODS: We conducted in-depth interviews with principal recipients of the funding, members of the Country Coordinating Mechanism (CCM) and front line peer outreach workers and their clients. We analyzed the data using a dynamic systems framework. RESULTS: El Salvador's national HIV combination prevention strategy had three main goals: 1) to decrease the sexual risk behaviors of men who have sex with men (MSM), commercial sex workers (CSW) and transgender women (TW); 2) to increase HIV testing rates among members of these populations and the proportion of PLH who know their status; and 3) to improve linkage to HIV treatment and adherence to antiretroviral therapy (ART). Intervention components to achieve these goals included peer outreach, community prevention centers and specialized STI/HIV clinics, and new adherence and retention protocols for PLH. In each intervention component, we identified several factors which reinforced or diminished intervention efforts. Factors that negatively affected all intervention activities were an increase in violence in El Salvador during implementation of the strategy, resistance to decentralization, and budget constraints. Factors that affected peer outreach and sexual risk reduction were the human resource capacity of grassroots organizations and conflicts of the national HIV strategy with other organizational missions. CONCLUSIONS: Overall, the national strategy improved access to HIV prevention and care through efforts to improve capacity building of grass roots organizations, reduced stigma, and improved coordination among organizations. However, failure to respond to environmental and organizational factors limited the intervention's potential impact.

Asunto(s)

Infecciones por VIH/prevención & control , Promoción de la Salud/normas , Adulto , El Salvador/epidemiología , Femenino , Salud Global , Infecciones por VIH/epidemiología , Accesibilidad a los Servicios de Salud/organización & administración , Accesibilidad a los Servicios de Salud/normas , Homosexualidad Masculina/estadística & datos numéricos , Humanos , Incidencia , Malaria/prevención & control , Masculino , Tamizaje Masivo , Evaluación de Programas y Proyectos de Salud , Investigación Cualitativa , Conducta de Reducción del Riesgo , Asunción de Riesgos , Trabajo Sexual , Trabajadores Sexuales , Conducta Sexual , Minorías Sexuales y de Género , Estigma Social , Análisis de Sistemas , Transexualidad/epidemiología , Transexualidad/prevención & control , Tuberculosis/prevención & control , Sexo Inseguro/prevención & control

RESUMEN

BACKGROUND: Little is known about ways network-level factors that may influence the adoption of combination prevention behaviors among injection networks, or how network-oriented interventions might moderate this behavior change process. METHODS: A total of 232 unique injection risk networks in Philadelphia, PA, were randomized to a peer educator network-oriented intervention or standard of care control arm. Network-level aggregates reflecting the injection networks' baseline substance use dynamics, social interactions, and the networks exposure to gender- and structural-related vulnerabilities were calculated and used to predict changes in the proportion of network members adopting safer injection practices at 6-month follow-up. RESULTS: At follow-up, safer injection practices were observed among 46.31% of a network's members on average. In contrast, 25.7% of networks observed no change. Controlling for the effects of the intervention, significant network-level factors influencing network-level behavior change reflected larger sized injection networks (b=2.20, p=0.013) with a greater proportion of members who shared needles (b=0.29, p<0.001) and engaged in poly drug use at baseline (b=6.65, p=0.021). Changes in a network's safer injection practices were also observed for networks with fewer new network members (b=-0.31, p=0.008), and for networks whose members were proportionally less likely to have experienced incarceration (b=-0.20, p=0.012) or more likely to have been exposed to drug treatment (b=0.17, p=0.034) in the 6-months prior to baseline. A significant interaction suggested the intervention uniquely facilitated change in safer injection practices among female-only networks (b=-0.32, p=0.046). CONCLUSIONS: Network-level factors offer insights into ways injection networks might be leveraged to promote combination prevention efforts.

Asunto(s)

Terapia Conductista/métodos , Grupo Paritario , Asunción de Riesgos , Apoyo Social , Abuso de Sustancias por Vía Intravenosa/psicología , Adulto , Femenino , Estudios de Seguimiento , Infecciones por VIH/etiología , Infecciones por VIH/prevención & control , Humanos , Relaciones Interpersonales , Masculino , Philadelphia , Abuso de Sustancias por Vía Intravenosa/complicaciones , Abuso de Sustancias por Vía Intravenosa/terapia , Resultado del Tratamiento

RESUMEN

Background: A "seek-test-treat" intervention (ARISTOTLE) was implemented in response to an outbreak of human immunodeficiency virus (HIV) infection among persons who inject drugs (PWID) in Athens. We assess trends in HIV incidence, prevalence, risk behaviors and access to prevention/treatment. Methods: Methods included behavioral data collection, provision of injection equipment, HIV testing, linkage to opioid substitution treatment (OST) programs and HIV care during 5 rounds of respondent-driven sampling (2012-2013). HIV incidence was estimated from observed seroconversions. Results: Estimated coverage of the target population was 88% (71%-100%; 7113 questionnaires/blood samples from 3320 PWID). The prevalence of HIV infection was 16.5%. The incidence per 100 person-years decreased from 7.8 (95% confidence interval, 4.6-13.1) (2012) to 1.7 (0.55-5.31) (2013; P for trend = .001). Risk factors for seroconversion were frequency of injection, homelessness, and history of imprisonment. Injection at least once daily declined from 45.2% to 18.8% (P < .001) and from 36.8% to 26.0% (P = .007) for sharing syringes, and the proportion of undiagnosed HIV infection declined from 84.3% to 15.0% (P < .001). Current OST increased from 12.2% to 27.7% (P < .001), and 48.4% of unlinked seropositive participants were linked to HIV care through 2013. Repeat participants reported higher rates of adequate syringe coverage, linkage to HIV care and OST. Conclusions: Multiple evidence-based interventions delivered through rapid recruitment in a large proportion of the population of PWID are likely to have helped mitigate this HIV outbreak.

Asunto(s)

Brotes de Enfermedades/prevención & control , Brotes de Enfermedades/estadística & datos numéricos , Infecciones por VIH , Abuso de Sustancias por Vía Intravenosa , Adulto , Estudios de Cohortes , Femenino , Grecia/epidemiología , Infecciones por VIH/complicaciones , Infecciones por VIH/epidemiología , Infecciones por VIH/prevención & control , Humanos , Incidencia , Masculino , Prevalencia , Factores de Riesgo , Conducta Sexual/estadística & datos numéricos , Abuso de Sustancias por Vía Intravenosa/complicaciones , Abuso de Sustancias por Vía Intravenosa/epidemiología

RESUMEN

BACKGROUND: Nearly three decades into the epidemic, sub-Saharan Africa (SSA) remains the region most heavily affected by human immunodeficiency virus (HIV), with nearly 70% of the 34 million people living with HIV globally residing in the region. In SSA, female and male youth (15 to 24 years) are at a disproportionately high risk of HIV infection compared to adults. As such, there is a need to target HIV prevention strategies to youth and to tailor them to a gender-specific context. This protocol describes the process for the multi-staged approach in the design of the MP3 Youth pilot study, a gender-specific, combination, HIV prevention intervention for youth in Kenya. OBJECTIVE: The objective of this multi-method protocol is to outline a rigorous and replicable methodology for a gender-specific combination HIV prevention pilot study for youth in high-burden settings, illustrating the triangulated methods undertaken to ensure that age, sex, and context are integral in the design of the intervention. METHODS: The mixed-methods, cross-sectional, longitudinal cohort pilot study protocol was developed by first conducting a systematic review of the literature, which shaped focus group discussions around prevention package and delivery options, and that also informed age- and sex- stratified mathematical modeling. The review, qualitative data, and mathematical modeling created a triangulated evidence base of interventions to be included in the pilot study protocol. To design the pilot study protocol, we convened an expert panel to select HIV prevention interventions effective for youth in SSA, which will be offered in a mobile health setting. The goal of the pilot study implementation and evaluation is to apply lessons learned to more effective HIV prevention evidence and programming. RESULTS: The combination HIV prevention package in this protocol includes (1) offering HIV testing and counseling for all youth; (2) voluntary medical circumcision and condoms for males; (3) pre-exposure prophylaxis (PrEP), conditional cash transfer (CCT), and contraceptives for females; and (4) referrals for HIV care among those identified as HIV-positive. The combination package platform selected is mobile health teams in an integrated services delivery model. A cross-sectional analysis will be conducted to determine the uptake of the interventions. To determine long-term impact, the protocol outlines enrolling selected participants in mutually exclusive longitudinal cohorts (HIV-positive, PrEP, CCT, and HIV-negative) followed by using mobile phone text messages (short message service, SMS) and in-person surveys to prospectively assess prevention method uptake, adherence, and risk compensation behaviors. Cross-sectional and sub-cohort analyses will be conducted to determine intervention packages uptake. CONCLUSIONS: The literature review, focus groups, and modeling indicate that offering age- and gender- specific combination HIV prevention interventions that include biomedical, behavioral, and structural interventions can have an impact on HIV risk reduction. Implementing this protocol will show the feasibility of delivering these services at scale. The MP3 Youth study is one of the few combination HIV prevention intervention protocols incorporating youth- and gender-specific interventions in one delivery setting. Lessons learned from the design of the protocol can be incorporated into the national guidance for combination HIV prevention for youth in Kenya and other high-burden SSA settings. TRIAL REGISTRATION: ClinicalTrials.gov NCT01571128; http://clinicaltrials.gov/ct2/show/NCT01571128?term=MP3+youth&rank=1 (Archived by WebCite at http://www.webcitation.org/6nmioPd54).