Population-level effectiveness of pre-exposure prophylaxis for HIV prevention among men who have sex with men in Montréal (Canada): a modelling study of surveillance and survey data.

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.

Navigating imperfect policies to donate plasma: Survey on plasma donation and a pilot plasma donation program among men who have sex with men in Canada.

BACKGROUND: In 2021, Canada implemented a pilot plasma program allowing some sexually active men who have sex with men (including but not limited to gay and bisexual men; gbMSM) to donate plasma. Changes to plasma donation policy could help address inequities in access to plasma donation and increase Canada's domestically collected plasma supply if more gbMSM donate as a result. We aimed to (1) examine views regarding plasma donation and the pilot program prior to implementation and (2) identify modifiable theory-informed predictors of gbMSM's intention to donate plasma. METHODS: We developed, piloted, and disseminated a questionnaire informed by the Theoretical Domains Framework (TDF). We recruited gbMSM in London (ON) and Calgary (AB) to an anonymous, online cross-sectional survey. RESULTS: A total of 246 gbMSM completed the survey. On scales from 1 (strongly disagree) to 5 (strongly agree), general intention to donate was high (mean = 4.24; SD = 0.94). The pilot program itself was mostly acceptable (mean = 3.71, SD = 1.16), but the intention to donate under the unique requirements of the pilot program was lower than general intention (mean = 3.58; SD = 1.26). Two domains from the theoretical domains framework (TDF) (beliefs about consequences of donating plasma and social influences) were independently associated with general intention to donate. DISCUSSION: The pilot plasma program as an incremental step toward more inclusive policies was mostly viewed as acceptable by the impacted communities. Historical and ongoing exclusions create unique barriers to donation. There are clear opportunities for developing theory-informed interventions to support gbMSM to donate plasma as policies continue to become more inclusive and more become eligible to donate.

Improved access yet inequitable experience: gay, bisexual and other men who have sex with men's views of more inclusive criteria for source plasma donation.

BACKGROUND: Canada has incrementally reduced restrictions to blood and plasma donation that impact men who have sex with men, gay, bisexual, and queer men, and some Two Spirit, transgender and non-binary individuals (MSM/2SGBTQ+). Prior to the launch of a pilot program in 2021 enabling some MSM/2SGBTQ + to donate source plasma, we explored the acceptability of the program among individuals who could become eligible to donate in the program. METHODS: We invited men identifying as MSM/2SGBTQ + to participate in two consecutive semi-structured interviews to explore their views on blood and plasma donation policy, plasma donation, and the proposed Canadian plasma donation program. Interview transcripts were analyzed thematically and acceptability-related themes were mapped onto the Theoretical Framework of Acceptability. RESULTS: Twenty-seven men identifying as having sex with men participated in 53 interviews. Eighteen themes were mapped onto the seven construct domains of the Theoretical Framework of Acceptability. Underlying all aspects of acceptability was a tension between four primary values influencing participants' views: altruism, equity, supply sufficiency, and evidence-based policy. The program was viewed as welcome progress on a discriminatory policy, with many excited to participate, yet tension with inequitable aspects of the program undermined support for the program and interest to contribute to it. The high demands of the program are unique for MSM/2SGBTQ + and are only tolerable as part of a program that is an incremental and instrumental step to more equitable donation policies. CONCLUSION: Findings highlight past experiences of exclusion in Canada as a unique and critical part of the context of the donation experience among MSM/2SGBTQ+. Despite the program's goals of greater inclusivity of MSM/2SGBTQ + individuals, the anticipated experience of the program included continued stigmatization and inequities. Future research should seek to understand the experienced views of MSM/2SGBTQ + donors to ensure that as policies change, policies are implemented equitably.

Validation of new, gender-neutral questions on recent sexual behaviors among plasma donors and men who have sex with men.

BACKGROUND AND OBJECTIVES: Several blood services might eventually interview donors with gender-neutral questions on sexual behaviors to improve the inclusivity of blood donation. We tested two ways (i.e., "scenarios") of asking donors about their recent sexual behaviors. MATERIALS AND METHODS: The study comprised 126 regular source plasma donors and 102 gay, bisexual, and other men who have sex with men (gbMSM), including 73 cis-gbMSM (i.e., the "cis-gbMSM subgroup," which excluded nonbinary, genderqueer, and trans individuals). In Scenario 1, participants were asked if, in the last 3 months, they "have […] had a new sexual partner or more than one sexual partner." In Scenario 2, they were asked "Have you had a new sexual partner?" and "have you had more than one sexual partner?". Validation questions included more specific questions on the type of partners and sexual activity. RESULTS: Among plasma donors, sensitivity was 100.0% for both scenarios; specificity was 100.0% and 99.1% for Scenarios 1 and 2, respectively. Among gbMSM, sensitivity was 74.5% and 82.9% for Scenarios 1 and 2, respectively; specificity was 100.0% for both scenarios. Among cis-gbMSM, sensitivity was 88.6% and 100.0% for Scenarios 1 and 2, respectively; specificity was 100.0% for both scenarios. The area under the receiver operating characteristic curve of Scenario 2 was significantly higher than that of Scenario 1 among gbMSM and in the cis-gbMSM subgroup (all p < .05). CONCLUSION: Scenario 2 questions performed well among plasma donors and cis-gbMSM, but less so in the broader gbMSM population.

Staff perspectives on barriers and enablers to implementing alternative source plasma eligibility criteria for gay, bisexual, and other men who have sex with men.

BACKGROUND: Canadian Blood Services introduced new eligibility criteria that allows some sexually active gay, bisexual, and other men who have sex with men (gbMSM) to donate source plasma, marking a significant change from time-based deferral criteria. We aimed to identify potential barriers and enablers to implementing the new criteria from the perspective of donor center staff. STUDY DESIGN AND METHODS: We conducted Theoretical Domains Framework-informed interviews with staff from two source plasma donation centers in Canada. RESULTS: We completed 28 interviews between June 2020 and April 2021. Three themes representing eight domains captured key tensions. Valuing inclusive eligibility criteria: staff support inclusive criteria; many were concerned the new criteria remained discriminatory. Investing in positive donor experiences: staff wished to foster positive donor experiences; however, they worried gbMSM donors would express anger and disappointment regarding the new criteria, staff would experience unease over using stigmatizing criteria and convey nonverbal cues of discomfort, and recurring plasma donors may behave inappropriately. Supporting education, training, and transparency of eligibility criteria: participants believed providing in-person training (i.e., to explain criteria rationale, address discomfort, practice responding to donor questions) and ensuring donors and the public were well-informed of the upcoming changes would improve implementation. DISCUSSION: Participant views emphasize the importance of supporting staff through training and transparent communication to optimize the delivery of world-class equitable care for a new cohort of donors who have previously been excluded from plasma donation. Findings inform which staff supports to consider to improve implementation as policies continue to shift internationally.

Risk of transfusion-related acute lung injury and human immunodeficiency virus associated with donations from trans donors in Quebec, Canada.

BACKGROUND AND OBJECTIVES: Blood operator must establish selection criteria according to the populations at risk of blood-related infections and complications. Therefore, this study aimed to assess the risks of transfusion-related acute lung injury (TRALI) and human immunodeficiency virus (HIV) associated with donations from trans persons. MATERIALS AND METHODS: Donor screening data from Héma-Québec were used. The risks of TRALI and HIV were estimated based on internal data and assumptions derived from the literature. The risk was assessed under four scenarios: a most likely scenario, an optimistic scenario and two pessimistic scenarios. All scenarios assumed no prior screening for trans donors. RESULTS: The trans population comprised 134 donors, including 94 (70.1%) trans men. Of the 134 donors, 58 (43.3%) were deferred from donating a blood-derived product because of an ongoing gender-affirming genital surgery, and the remaining 76 (56.7%) were eligible donors. The risk of having a TRALI-causing donation, given that it comes from a trans man, was estimated at one every 115-999 years for all scenarios. The risk of having an HIV-contaminated donation, given that it comes from a trans woman, was estimated at one every 1881-37,600 years for all scenarios. CONCLUSION: This study suggests that donations from trans persons are associated with a negligible risk of TRALI and HIV.

Determinants of the intention to participate in a programme of plasma donation for fractionation among men who have sex with men.

BACKGROUND AND OBJECTIVES: Several approaches are currently under study to contribute to efforts to allow men who have sex with men (MSM) to donate blood. One of these approaches involves implementing a programme of plasma donation for fractionation, with a quarantine period. The goal of this article is to identify the determinants of intention to participate in the plasma donation programme among MSM in Montreal, Canada. MATERIALS AND METHODS: Based on the theory of planned behaviour, a questionnaire was developed to measure MSM's intention to donate plasma and identify influencing factors. A multiple linear regression analysis was conducted to identify the determinants of intention to donate plasma. RESULTS: Respondents' (N = 933) intention to donate plasma in the next six months was moderate. The multiple linear regression model explained 55% (P < 0·001) of the variation of intention. Intention was predicted by attitudes (ß = 0·34, P < 0·001), perceived behavioural control (ß = 0·28, P < 0·001), aged under 35 years (ß = 0·26, P < 0·001), history of blood donation (ß = 0·24, P < 0·001), subjective norm (ß = 0·21, P < 0·001), income above $40,000 (ß = 0·20, P < 0·001), moral norm (ß = 0·18, P < 0·001) and higher level of involvement in various issues LGBTQ+ communities are fighting for (ß = 0·09, P < 0·001). CONCLUSION: Our analyses show that intention to donate plasma within the proposed programme is associated with personal, social and structural factors, but more strongly predicted by factors related to the theory of planned behaviour. Our results also highlight the importance of involving MSM; community acceptability of the plasma donation programme would probably be higher if MSM felt respected and party to the decisions.

Combination HIV Prevention Strategies Among Montreal Gay, Bisexual, and Other Men Who Have Sex with Men in the PrEP Era: A Latent Class Analysis.

Pre-exposure prophylaxis (PrEP) became publicly available in Quebec for gay, bisexual and other men who have sex with men (GBM) in 2013. We used baseline data from Engage, a cohort of GBM recruited by respondent-driven sampling, to examine patterns of combination HIV prevention use among Montreal GBM since PrEP became available. Latent class analysis, stratified by HIV status, was used to categorize GBM by self-reported use of biomedical and behavioural prevention strategies. Correlates of resulting classes were identified using multinomial logistic regression. Among HIV-negative/unknown GBM (n = 968), we identified four classes: low use of prevention (32%), condoms (40%), seroadaptive behaviour (21%), and biomedical (including PrEP; 7%). Those using prevention (condoms, seroadaptive behaviour, and biomedical) had a higher number of anal sex partners and were more likely to report a recent sexually transmitted infection diagnosis. GBM using biomedical prevention also had a higher level of formal education. Among GBM living with HIV (n = 200), we identified three classes: mainly antiretroviral treatment (ART) with viral suppression (53%), ART with viral suppression and condoms (19%), and ART with viral suppression and seroadaptive behaviour (18%). Again, the number of anal sex partners was higher among those using condoms and seroadaptive behaviours. Our findings show antiretroviral-based prevention, either alone or in combination with other strategies, is clearly a component of the HIV prevention landscape for GBM in Montreal. Nevertheless, PrEP uptake remains low, and there is a need to promote its availability more widely.

Barriers and enablers to source plasma donation by gay, bisexual and other men who have sex with men under revised eligibility criteria: protocol for a multiple stakeholder feasibility study.

BACKGROUND: Blood donation policy in Canada for gay, bisexual and other men who have had sex with men (gbMSM) has changed progressively in the last decade from indefinite deferral to 3-month deferral from last male-to-male sex. Driven by safety data and overseen by the national regulator, more inclusive policies continue to redress the disparity in donation for gbMSM. At the same time, the need for source plasma to prepare fractionated blood products is growing worldwide. The collection and processing of source plasma ensures greater safety compared to whole blood donation with respect to transfusion-transmitted infection. This greater safety offers an opportunity to evolve policies for gbMSM from time-based to behaviour-based deferral using revised eligibility criteria. However, changing policies does not in itself necessarily guarantee that gbMSM will donate or that staff in donor clinics are ready to support them to do so. In anticipation of a move to behaviour-based donation screening for gbMSM in Canada, we aim to assess the acceptability of and perceived barriers and enablers to source plasma donation using revised screening criteria for gbMSM among key stakeholders to inform policy implementation strategies. METHODS: This mixed-methods feasibility study will involve gbMSM and donor centre staff to understand modifiable barriers to implementing more inclusive eligibility criteria. Key informant interviews and surveys will be rooted in the Theoretical Domains Framework to identify modifiable factors associated with source plasma donation motives in gbMSM and training needs in donation centre staff. We will use an integrated knowledge translation approach involving a partnership between researchers, the national blood operator and gbMSM, situating knowledge users as key research team members to ensure their perspectives inform all aspects of the research. DISCUSSION: Our integrated knowledge translation approach will provide a more comprehensive and collaborative understanding of blood operator and gbMSM needs while accelerating the implementation of study findings. Given the historical backdrop of the decades of exclusion of sexually active gbMSM from blood donation, this study has the potential not only to inform a process and policy for gbMSM to donate source plasma, a blood product, but also offers opportunities for new relationships between these knowledge users.

Trauma-Informed Practices to Address Intersections Between HIV and Intimate Partner Violence Among Women: Perspective of Community Service Providers.

The current study aimed to document intervention practices, challenges, and training needs concerning the intersections between HIV and intimate partner violence (IPV) among community service providers (n = 12). A direct content analysis using the Trauma-Informed Approach was performed. Results revealed that community service providers need to create a safe, trusting, and mutually collaborative environment in which the intersections between HIV and IPV trauma are recognized, screened, and discussed with women. These results also highlight the need to consolidate partnerships between HIV and IPV organizations to provide relevant services that consider traumatic experiences. Overall, these findings support the urgent need to develop, implement, and evaluate targeted community interventions that jointly address HIV and IPV.

'One step closer': Acceptability of a programme of plasma donation for fractionation from men who have sex with men.

BACKGROUND AND OBJECTIVES: In Canada, Héma-Québec is considering the possibility of allowing men who have sex with men (MSM) to donate plasma for fractionation combined with a mandatory quarantine period. This study aims to assess the acceptability and operational feasibility of the programme in the targeted population. MATERIALS AND METHODS: Seven focus groups with MSM (N = 47) were conducted in Montréal, regarding their beliefs underlying attitudes, subjective norms and perceived behavioural control relating to intention to participate in a programme of plasma donation for fractionation. A theoretical thematic content analysis was realized. RESULTS: Participants brought up benefits of the programme. Some are altruistic (help others, save lives, contribute as citizens), while others are linked to what it could bring to their community (progress, opportunity to include MSM in blood donation programmes, acknowledgement of MSM's contributions to the well-being of others). However, even if the programme is in accordance with their altruistic values, it clashes with their values of equality and social justice. Many disadvantages were raised (discrimination and stigmatization of MSM, the fact that their blood is presented as being not as good as the blood of others). Facilitating factors and barriers to participation were put forward in terms of programme characteristics and sites where donations would be made. CONCLUSION: The findings suggest some interest in the programme of plasma donation for fractionation, but this is significantly tempered by the fact that differential treatment for MSM would continue and that their demands regarding access to whole blood donation are still unmet.

Exploring the mediating and moderating roles of body-related concerns and social interactions on the association between early puberty and psychological distress in young adult women.

OBJECTIVE: To explore the mechanisms through which early puberty is associated with psychological distress in women aged 18-25. This cross-sectional study aims to investigate whether body-related concerns and social interactions moderate or mediate this association. METHODS: Participants were compared on measures evaluating psychological distress, body image dysphoria, bulimic symptomatology and negative intimacy with best friend according to three pubertal timing groups: (1) "very early" puberty (menarche at 9 years old or less), (2) "early" puberty (menarche at 10 years old), and (3) "on-time" puberty (menarche between 11 and 13 years old). Forward stepwise multiple regressions and multiple mediation analysis were successively performed to see whether body-related concerns and peer interactions mediate or moderate the relationship between premature puberty and psychological distress. RESULTS: Controlling for age and ethnicity, results indicated (1) that women who began puberty "very early" had significantly higher levels of psychological distress than their "on-time" counterparts; (2) the association found between very early puberty and psychological distress was mediated by body image dysphoria and negative intimacy with best friend and was moderated by bulimic symptomatology. No mediational effect was found in women whose puberty was "early". CONCLUSION: These findings highlight the importance of using more than one group of early pubertal timing and the role of body and intimacy concerns in the explanation of psychological distress in women. Intervention strategies addressing the increased risk of psychological distress in women who begin puberty very early should target their body image and ability to form intimate friendships.

Self-Esteem and HIV Infection in Morocco: Associated Factors Among People Living with HIV-Results from a Community-Based Study.

People living with HIV (PLHIV) face specific issues regarding mental quality of life (QoL), in particular self-esteem. The objective of this study was to measure self-esteem and to identify associated factors among PLHIV in Morocco. A 125-item questionnaire was administered to 300 PLHIV. The dependent variable was adapted from Rosenberg's self-esteem scale (range 0-4). A weighted multiple linear regression was performed. The mean level of self-esteem was 2.4 ± 1.0. The factors independently associated with self-esteem were: feeling of loneliness (p = 0.001), perceived seriousness of infection (p = 0.006), thinking serostatus disclosure was a mistake (p = 0.007), thinking HIV infection will last for life (p = 0.008), sexual orientation (p = 0.050), satisfaction with sexual life (p = 0.019) and perceived treatment efficacy (p = 0.009). These results underline the need for evidence-based interventions (e.g. anti-discrimination measures, interventions to prevent social isolation of PLHIV, support in the serostatus disclosure process), in order to improve the social environment and eventually improve their self-esteem and QoL.

Previous experiences of pregnancy and early motherhood among women living with HIV: a latent class analysis.

Previous maternity experiences may influence subsequent reproductive intentions and motherhood experiences. We used latent class analysis to identify patterns of early motherhood experience reported for the most recent live birth of 905 women living with HIV enrolled in the Canadian HIV Women's Sexual and Reproductive Health Cohort Study (CHIWOS). Four indicators were used: difficulties getting pregnant, feelings when finding out pregnancy, feelings during pregnancy, and feelings during the first year postpartum. Most (70.8%) pregnancies analyzed occurred before HIV diagnosis. A four-class maternity experience model was selected: "overall positive experience" (40%); "positive experience with postpartum challenges" (23%); "overall mixed experience" (14%); and "overall negative experience" (23%). Women represented in the "overall negative experience" class were more likely to be younger at delivery, to not know the HIV status of their pregnancy partner, and to report previous pregnancy termination. Women represented in the "positive experience with postpartum challenges" class were more likely to report previous miscarriage, stillbirth or ectopic pregnancy. We found no associations between timing of HIV diagnosis (before, during or after pregnancy) and experience patterns. Recognition of the different patterns of experiences can help providers offer a more adapted approach to reproductive counseling of women with HIV.

Decision-making about motherhood among women living with HIV in Canada: a negotiation of multidimensional risks.

Little research in Canada has examined the perspectives of women living with HIV on decision-making across the stages of motherhood. In 2004-2005, semi-structured interviews were conducted with 42 African, Caucasian and Haitian HIV-positive women recruited in Montreal. All were or wished to be biological mothers. Transcripts underwent thematic analysis organised by three culturally informed models of motherhood described by the participants, which influenced decision-making and perceived risks. For women who saw motherhood as 'self-fulfilment and completeness', vertical HIV transmission was a primary concern. It threatened their identity as a 'good mother', which also meant adhering to antiretrovirals. For women who viewed motherhood as a 'social realisation' (all African or Haitian), fears of compromised fertility dominated. Not becoming pregnant threatened their social status and presumed health within their community. Antiretrovirals were abandoned after delivery, fearing they would reveal their HIV status. For women endorsing a 'personal growth' model of motherhood (all Caucasian), threats to personal health were paramount. Pregnancy meant purifying body and soul. Antiretrovirals, seen as pollutants, were stopped after delivery. These findings can inform current research and sensitise health providers to the complex biological, psychological, social and spiritual risks that HIV-positive women negotiate in motherhood-related decision-making, towards more patient-centred care.

Empowering Malian women living with HIV regarding serostatus disclosure management: Short-term effects of a community-based intervention.

OBJECTIVE: The objective of this study was to assess the short-term effects of Gundo-So-a program aimed at empowering Malian women living with HIV (WLHIV) regarding serostatus disclosure management. METHODS: A pre-experimental study with two measures (one week before and four weeks after Gundo-So) was carried out. A 35-item questionnaire was administered to a convenience sample of 210 WLHIV. Six outcomes were considered: ability to decide whether or not to disclose HIV status, self-efficacy to keep HIV status a secret, self-efficacy to disclose HIV status, feeling crushed by the weight of secrecy, perceived physical health, and perceived psychological health. For each outcome, temporal changes associated with the intervention were assessed using linear regressions with random intercepts. RESULTS: Statistically significant change was observed for all six outcomes between the pre- and post-intervention measures. Furthermore, several variables were associated with the baseline levels of the outcomes and the intervention effect. CONCLUSION: The results suggest that Gundo-So empowers Malian WLHIV with regard to serostatus disclosure management, thus improving their perceived physical and psychological health. PRACTICAL IMPLICATIONS: These results highlight the need for programs to empower WLHIV regarding serostatus disclosure, so that WLHIV can make free and informed decisions regarding serostatus disclosure.

Stigma Management Trajectories in Youth with Perinatally Acquired HIV and Their Families: A Qualitative Perspective.

This study explores how family, secrecy and silence contribute to the adoption of stigma management strategies among youth with perinatally acquired HIV (PAHIV). A qualitative method was used. Eighteen youths with PAHIV aged 13-22 years old took part in a semi-structured interview. An exploratory content analysis was performed. Analyses of interviews allowed identification of two HIV stigma management trajectories, both sensitive to the family context: [1] a consolidation of family ties, which contributes to solidarity in stigma management; and [2] a weakening or dissolution of family ties, which contributes to solitary stigma management strategy. Family conditions that support the children in their efforts to develop active stigma management strategies are described. Children likely to experience weakening or dissolution family ties must build strong bonds in the clinical environment and maintain these into adulthood so as to afford them the support they need.

Large cluster outbreaks sustain the HIV epidemic among MSM in Quebec.

OBJECTIVE: HIV-1 epidemics among MSM remain unchecked despite advances in treatment and prevention paradigms. This study combined viral phylogenetic and behavioural risk data to better understand underlying factors governing the temporal growth of the HIV epidemic among MSM in Quebec (2002-2015). METHODS: Phylogenetic analysis of pol sequences was used to deduce HIV-1 transmission dynamics (cluster size, size distribution and growth rate) in first genotypes of treatment-naïve MSM (2002-2015, n = 3901). Low sequence diversity of first genotypes (0-0.44% mixed base calls) was used as an indication of early-stage infection. Behavioural risk data were obtained from the Montreal rapid testing site and primary HIV-1-infection cohorts. RESULTS: Phylogenetic analyses uncovered high proportion of clustering of new MSM infections. Overall, 27, 45, 48, 53 and 57% of first genotypes within one (singleton, n = 1359), 2-4 (n = 692), 5-9 (n = 367), 10-19 (n = 405) and 20+ (n = 1277) cluster size groups were early infections (<0.44% diversity). Thirty viruses within large 20+ clusters disproportionately fuelled the epidemic, representing 13, 25 and 42% of infections, first genotyped in 2004-2007 (n = 1314), 2008-2011 (n = 1356) and 2012-2015 (n = 1033), respectively. Of note, 35, 21 and 14% of MSM belonging to 20+, 2-19 and one (singleton) cluster groups were under 30 years of age, respectively. Half of persons seen at the rapid testing site (2009-2011, n = 1781) were untested in the prior year. Poor testing propensity was associated with fewer reported partnerships. CONCLUSION: Addressing the heterogeneity in transmission dynamics among HIV-1-infected MSM populations may help guide testing, treatment and prevention strategies.

HIV seropositivity and sexuality: cessation of sexual relations among men and women living with HIV in five countries.

The sexuality of people living with HIV (PLHIV) is a key issue in the fight against HIV, as it influences both the dynamic of the epidemic and the quality of life of PLHIV. The present study examined the factors associated with cessation of sexual relations after HIV diagnosis among men and women in five countries: Mali, Morocco, Democratic Republic of the Congo, Romania and Ecuador. A community-based cross-sectional study was implemented by a mixed consortium [researchers/community-based organizations (CBO)]. Trained CBO members interviewed 1500 PLHIV in contact with CBOs using a 125-item questionnaire. A weighted multivariate logistic regression and a separate gender analysis were performed. Among the 1413 participants, 471 (33%) declared that they stopped having sexual relations after their HIV diagnosis, including 318 women (42%) and 153 men (23%) (p < .001). Concerning women, variables associated with the cessation of sexual relations in the final multivariate model were mainly related with relational factors and the possibility of getting social support (e.g., needing help to disclose HIV serostatus, feeling lonely every day, not finding support in CBOs, not being in a couple). Men's sexual activity was more associated with their representations and their perception of the infection (e.g., thinking they will have their HIV infection for the rest of their life, perceiving the HIV infection as a mystery, perceiving the infection as serious). Furthermore, the following variables were associated with both men and women sexual behaviours: being older, having suffered from serious social consequences after serostatus disclosure and not being able to regularly discuss about HIV with their steady partner. Results suggested clear differences between men and women regarding cessation of sexual relations and highlighted the importance of implementing gender-based tailored interventions that promote safe and satisfying sexuality, as it is known to have a positive impact on the overall well-being of PLHIV.

Beyond Condoms: Risk Reduction Strategies Among Gay, Bisexual, and Other Men Who Have Sex With Men Receiving Rapid HIV Testing in Montreal, Canada.

Gay, bisexual, and other men who have sex with men (MSM) have adapted their sexual practices over the course of the HIV/AIDS epidemic based on available data and knowledge about HIV. This study sought to identify and compare patterns in condom use among gay, bisexual, and other MSM who were tested for HIV at a community-based testing site in Montreal, Canada. Results showed that while study participants use condoms to a certain extent with HIV-positive partners and partners of unknown HIV status, they also make use of various other strategies such as adjusting to a partner's presumed or known HIV status and viral load, avoiding certain types of partners, taking PEP, and getting tested for HIV. These findings suggest that MSM who use condoms less systematically are not necessarily taking fewer precautions but may instead be combining or replacing condom use with other approaches to risk reduction.