BackgroundHuman papillomavirus (HPV) infection is associated with anal cancers and is more preval... more BackgroundHuman papillomavirus (HPV) infection is associated with anal cancers and is more prevalent in gay, bisexual, and men who have sex with men (gbMSM), partly due to their vulnerability to HIV infection. Baseline HPV genotype distributions and risk factors can inform the design of next‐generation HPV vaccines to prevent anal cancer.MethodsA cross‐sectional study was conducted among gbMSM receiving care at a HIV/STI clinic in Nairobi, Kenya. Anal swabs were genotyped using a Luminex microsphere array. Multiple logistic regression methods were used to identify risk factors for four HPV outcomes (any HPV, any HR‐HPV, and 4‐ and 9‐valent vaccine‐preventable HPVs).ResultsAmong 115 gbMSM, 51 (44.3%) were HIV‐infected. Overall HPV prevalence was 51.3%; 84.3% among gbMSM living with HIV and 24.6% among gbMSM without HIV (p < 0.001). One‐third (32.2%) had HR‐HPV and the most prevalent vaccine‐preventable HR‐HPV genotypes were 16, 35, 45, and 58. HPV‐18 was uncommon (n = 2). The 9‐valent Gardasil vaccine would have prevented 61.0% of HPV types observed in this population. In multivariate analyses, HIV status was the only significant risk factor for any HPV (adjusted odds ratio [aOR]:23.0, 95% confidence interval [95% CI]: 7.3–86.0, p < 0.001) and for HR‐HPV (aOR: 8.9, 95% CI: 2.8–36.0, p < 0.001). Similar findings were obtained for vaccine‐preventable HPVs. Being married to a woman significantly increased the odds of having HR‐HPV infections (aOR: 8.1, 95% CI: 1.6–52.0, p = 0.016).ConclusionsGbMSM living with HIV in Kenya are at higher risk of anal HPV infections including genotypes that are preventable with available vaccines. Our findings support the need for a targeted HPV vaccination campaign in this population.
Objective: Both HIV infection and identifying as MSM have been linked to altered rectal microbiot... more Objective: Both HIV infection and identifying as MSM have been linked to altered rectal microbiota composition, but few studies have studied sexual behavioural associations with rectal microbiota within MSM. In addition, most rectal microbiota studies in MSM have been limited geographically to Europe and North America, and replication of findings in lower and middle-income countries is lacking. Design: A cross-sectional study. Methods: We enrolled MSM from Nairobi, Kenya, and determined their HIV/sexually transmitted infection status. Rectal specimens were obtained for 16s rRNA sequencing of the rectal microbiota, and sexual behaviour was characterized using a standardized questionnaire. Microbiome differences were modelled using nonparametric statistics, Bray-Curtis ecological distance metrics and analyses of differential taxa abundance. Multivariable linear regression was used to model HIV status and recent sexual activity as predictors of alpha diversity, controlling for a range ...
IntroductionApproximately 240,000 people live with HIV in Ukraine, concentrated among key populat... more IntroductionApproximately 240,000 people live with HIV in Ukraine, concentrated among key populations, including sex workers. Non-governmental organizations (NGOs) play an important role in the funding and delivery of HIV testing and prevention services in Ukraine. These services are set within the context of national healthcare reforms as well as ongoing armed conflict. This study seeks to describe and understand the usage of HIV testing and prevention services among sex workers in the eastern Ukrainian city of Dnipro.MethodsA cross-sectional bio-behavioral survey was administered in September 2017-March 2018 among 560 sex workers working in Dnipro. Descriptive analyses of survey data are presented alongside multivariable logistic regression models identifying factors associated with NGO awareness and HIV testing in the past 12 months; adjusted odds ratios (AOR) and 95% confidence intervals (95% CI) are reported.ResultsSixty-two percent of respondents were aware of NGOs offering HI...
Background We evaluated the validity and reliability of the Neilands sexual stigma scale administ... more Background We evaluated the validity and reliability of the Neilands sexual stigma scale administered to 871 gay, bisexual, and other men who have sex with men (GBMSM) at two research locations in Kenya. Methods Using cross-validation, exploratory factor analysis (EFA) was performed on a randomly selected subset of participants and validated using confirmatory factor analysis (CFA) on the remaining participants. Associations of the initial and final stigma scale factors with depressive symptoms, alcohol use, and other substance use were examined for the entire dataset. Results EFA produced a two-factor scale of perceived and enacted stigma. The CFA model fit to the two-factor scale was improved after removing three cross-loaded items and adding correlated errors (chi-squared = 26.5, df 17, p = 0.07). Perceived stigma was associated with depressive symptoms (beta = 0.34, 95% CI 0.24, 0.45), alcohol use (beta = 0.14, 95% CI 0.03, 0.25) and other substance use (beta = 0.19, 95% CI 0.07...
Background HIV self-testing (HIVST) has emerged as a way of reaching individuals who may be less ... more Background HIV self-testing (HIVST) has emerged as a way of reaching individuals who may be less likely to access testing, including men who have sex with men (MSM). Understanding the social networks of MSM is key to tailoring interventions, such as HIVST, for particular locations. Methods We undertook a socio-sexual network study to characterize and identify patterns of connection among MSM and inform an HIVST intervention in three sites in Kenya. Community researchers in each site selected eight seeds to complete a demographic form and network surveys for 15 each of their sexual and social network members. Seeds recruited three respondents, including two regular service users and one MSM who was “unreached” by the program, who then each identified three respondents, resulting with data on 290 individuals. Results Findings illustrate the interconnectedness of community-based organization (CBO) members and non-members. In networks where a majority of members had a CBO membership, me...
The authors describe the plight of sex workers, a particularly disadvantaged community that is hi... more The authors describe the plight of sex workers, a particularly disadvantaged community that is highly marginalized and vulnerable. Sex workers were hard hit by the pandemic. The authors examine the impact of COVID-19 on sex workers’ lives and livelihoods, their response to the crisis, and the strategies that they employed to battle the pandemic.During the lockdown, female sex workers lost their livelihoods which plunged them and their families into extreme poverty. Even when unlock measures were announced, the business of sex work did not return to normal. Sex work, by its very nature, demands physical proximity—not physical distancing. Consequently, sex workers had to innovate to find work to survive. Loss of livelihoods also brought forth hidden mental health problems. Gripped by anxiety and depression due to the uncertainty about when the pandemic would end, sex workers went into despair. Some even attempted suicide. Violence in the family increased significantly. For sex workers...
Decline in new HIV infections in the Asia–Pacific region (APAC) continues to be slow, emphasising... more Decline in new HIV infections in the Asia–Pacific region (APAC) continues to be slow, emphasising the importance of scaling up new HIV prevention strategies, such as pre-exposure prophylaxis (PrEP). To help inform PrEP rollout in APAC, we conducted a rapid review of published literature on PubMed from 2015 to 2020, to assess feasibility, implementation strategies, cost-effectiveness, and availability of national policies and guidelines; for the latter, we also did an expanded Internet search. This review focussed on nine countries contributing >95% of new infections in this region. A total of 36 PrEP-related studies conducted among men who have sex with men, female sex workers, and transgender women were included, of which 29 were quantitative, six were qualitative and one was a mixed-method study. Most of the studies have addressed the availability and acceptability of PrEP, whereas cost-effectiveness of any approach was assessed by limited studies. Limited published information...
The goal of this study is to create new knowledge about the individual, social and environmental ... more The goal of this study is to create new knowledge about the individual, social and environmental factors that lead to increased risk among MSM so that programs can be better designed. The study will be conducted in three diverse cities in south India and will involve the MSM community as researchers are to gather in-depth information from MSM. Analysis will focus on differences in how MSM interact with each other and with the broader social environment to uncover how these interactions influence HIV risk and vulnerability. The results will be used to inform the MSM community, and HIV prevention programs, about the best strategies to promote behavior change, and reduce HIV risk.
WHO South-East Asia Journal of Public Health, 2020
Sex workers have been one of the marginalized groups that have been particularly affected by Indi... more Sex workers have been one of the marginalized groups that have been particularly affected by India’s stringent lockdown in response to the coronavirus disease 2019 (COVID-19) pandemic. The sudden loss of livelihood and lack of access to health care and social protection intensified the vulnerabilities of sex workers, especially those living with HIV. In response, Ashodaya Samithi, an organization of more than 6000 sex workers, launched an innovative programme of assistance in four districts in Karnataka. Since access to antiretroviral therapy (ART) was immediately disrupted, Ashodaya adapted its HIV outreach programme to form an alternative, community-led system of distributing ART at discreet, private sites. WhatsApp messaging was used to distribute information on accessing government social benefits made available in response to the COVID-19 pandemic. Other assistance included advisory messages posted in WhatsApp groups to raise awareness, dispel myths and mitigate violence, and regular, discreet phone check-ins to follow up on the well-being of members. The lessons learnt from these activities represent an important opportunity to consider more sustainable approaches to the health of marginalized populations that can enable community organizations to be better prepared to respond to other public health crises as they emerge.
BackgroundHuman papillomavirus (HPV) infection is associated with anal cancers and is more preval... more BackgroundHuman papillomavirus (HPV) infection is associated with anal cancers and is more prevalent in gay, bisexual, and men who have sex with men (gbMSM), partly due to their vulnerability to HIV infection. Baseline HPV genotype distributions and risk factors can inform the design of next‐generation HPV vaccines to prevent anal cancer.MethodsA cross‐sectional study was conducted among gbMSM receiving care at a HIV/STI clinic in Nairobi, Kenya. Anal swabs were genotyped using a Luminex microsphere array. Multiple logistic regression methods were used to identify risk factors for four HPV outcomes (any HPV, any HR‐HPV, and 4‐ and 9‐valent vaccine‐preventable HPVs).ResultsAmong 115 gbMSM, 51 (44.3%) were HIV‐infected. Overall HPV prevalence was 51.3%; 84.3% among gbMSM living with HIV and 24.6% among gbMSM without HIV (p < 0.001). One‐third (32.2%) had HR‐HPV and the most prevalent vaccine‐preventable HR‐HPV genotypes were 16, 35, 45, and 58. HPV‐18 was uncommon (n = 2). The 9‐valent Gardasil vaccine would have prevented 61.0% of HPV types observed in this population. In multivariate analyses, HIV status was the only significant risk factor for any HPV (adjusted odds ratio [aOR]:23.0, 95% confidence interval [95% CI]: 7.3–86.0, p < 0.001) and for HR‐HPV (aOR: 8.9, 95% CI: 2.8–36.0, p < 0.001). Similar findings were obtained for vaccine‐preventable HPVs. Being married to a woman significantly increased the odds of having HR‐HPV infections (aOR: 8.1, 95% CI: 1.6–52.0, p = 0.016).ConclusionsGbMSM living with HIV in Kenya are at higher risk of anal HPV infections including genotypes that are preventable with available vaccines. Our findings support the need for a targeted HPV vaccination campaign in this population.
Objective: Both HIV infection and identifying as MSM have been linked to altered rectal microbiot... more Objective: Both HIV infection and identifying as MSM have been linked to altered rectal microbiota composition, but few studies have studied sexual behavioural associations with rectal microbiota within MSM. In addition, most rectal microbiota studies in MSM have been limited geographically to Europe and North America, and replication of findings in lower and middle-income countries is lacking. Design: A cross-sectional study. Methods: We enrolled MSM from Nairobi, Kenya, and determined their HIV/sexually transmitted infection status. Rectal specimens were obtained for 16s rRNA sequencing of the rectal microbiota, and sexual behaviour was characterized using a standardized questionnaire. Microbiome differences were modelled using nonparametric statistics, Bray-Curtis ecological distance metrics and analyses of differential taxa abundance. Multivariable linear regression was used to model HIV status and recent sexual activity as predictors of alpha diversity, controlling for a range ...
IntroductionApproximately 240,000 people live with HIV in Ukraine, concentrated among key populat... more IntroductionApproximately 240,000 people live with HIV in Ukraine, concentrated among key populations, including sex workers. Non-governmental organizations (NGOs) play an important role in the funding and delivery of HIV testing and prevention services in Ukraine. These services are set within the context of national healthcare reforms as well as ongoing armed conflict. This study seeks to describe and understand the usage of HIV testing and prevention services among sex workers in the eastern Ukrainian city of Dnipro.MethodsA cross-sectional bio-behavioral survey was administered in September 2017-March 2018 among 560 sex workers working in Dnipro. Descriptive analyses of survey data are presented alongside multivariable logistic regression models identifying factors associated with NGO awareness and HIV testing in the past 12 months; adjusted odds ratios (AOR) and 95% confidence intervals (95% CI) are reported.ResultsSixty-two percent of respondents were aware of NGOs offering HI...
Background We evaluated the validity and reliability of the Neilands sexual stigma scale administ... more Background We evaluated the validity and reliability of the Neilands sexual stigma scale administered to 871 gay, bisexual, and other men who have sex with men (GBMSM) at two research locations in Kenya. Methods Using cross-validation, exploratory factor analysis (EFA) was performed on a randomly selected subset of participants and validated using confirmatory factor analysis (CFA) on the remaining participants. Associations of the initial and final stigma scale factors with depressive symptoms, alcohol use, and other substance use were examined for the entire dataset. Results EFA produced a two-factor scale of perceived and enacted stigma. The CFA model fit to the two-factor scale was improved after removing three cross-loaded items and adding correlated errors (chi-squared = 26.5, df 17, p = 0.07). Perceived stigma was associated with depressive symptoms (beta = 0.34, 95% CI 0.24, 0.45), alcohol use (beta = 0.14, 95% CI 0.03, 0.25) and other substance use (beta = 0.19, 95% CI 0.07...
Background HIV self-testing (HIVST) has emerged as a way of reaching individuals who may be less ... more Background HIV self-testing (HIVST) has emerged as a way of reaching individuals who may be less likely to access testing, including men who have sex with men (MSM). Understanding the social networks of MSM is key to tailoring interventions, such as HIVST, for particular locations. Methods We undertook a socio-sexual network study to characterize and identify patterns of connection among MSM and inform an HIVST intervention in three sites in Kenya. Community researchers in each site selected eight seeds to complete a demographic form and network surveys for 15 each of their sexual and social network members. Seeds recruited three respondents, including two regular service users and one MSM who was “unreached” by the program, who then each identified three respondents, resulting with data on 290 individuals. Results Findings illustrate the interconnectedness of community-based organization (CBO) members and non-members. In networks where a majority of members had a CBO membership, me...
The authors describe the plight of sex workers, a particularly disadvantaged community that is hi... more The authors describe the plight of sex workers, a particularly disadvantaged community that is highly marginalized and vulnerable. Sex workers were hard hit by the pandemic. The authors examine the impact of COVID-19 on sex workers’ lives and livelihoods, their response to the crisis, and the strategies that they employed to battle the pandemic.During the lockdown, female sex workers lost their livelihoods which plunged them and their families into extreme poverty. Even when unlock measures were announced, the business of sex work did not return to normal. Sex work, by its very nature, demands physical proximity—not physical distancing. Consequently, sex workers had to innovate to find work to survive. Loss of livelihoods also brought forth hidden mental health problems. Gripped by anxiety and depression due to the uncertainty about when the pandemic would end, sex workers went into despair. Some even attempted suicide. Violence in the family increased significantly. For sex workers...
Decline in new HIV infections in the Asia–Pacific region (APAC) continues to be slow, emphasising... more Decline in new HIV infections in the Asia–Pacific region (APAC) continues to be slow, emphasising the importance of scaling up new HIV prevention strategies, such as pre-exposure prophylaxis (PrEP). To help inform PrEP rollout in APAC, we conducted a rapid review of published literature on PubMed from 2015 to 2020, to assess feasibility, implementation strategies, cost-effectiveness, and availability of national policies and guidelines; for the latter, we also did an expanded Internet search. This review focussed on nine countries contributing >95% of new infections in this region. A total of 36 PrEP-related studies conducted among men who have sex with men, female sex workers, and transgender women were included, of which 29 were quantitative, six were qualitative and one was a mixed-method study. Most of the studies have addressed the availability and acceptability of PrEP, whereas cost-effectiveness of any approach was assessed by limited studies. Limited published information...
The goal of this study is to create new knowledge about the individual, social and environmental ... more The goal of this study is to create new knowledge about the individual, social and environmental factors that lead to increased risk among MSM so that programs can be better designed. The study will be conducted in three diverse cities in south India and will involve the MSM community as researchers are to gather in-depth information from MSM. Analysis will focus on differences in how MSM interact with each other and with the broader social environment to uncover how these interactions influence HIV risk and vulnerability. The results will be used to inform the MSM community, and HIV prevention programs, about the best strategies to promote behavior change, and reduce HIV risk.
WHO South-East Asia Journal of Public Health, 2020
Sex workers have been one of the marginalized groups that have been particularly affected by Indi... more Sex workers have been one of the marginalized groups that have been particularly affected by India’s stringent lockdown in response to the coronavirus disease 2019 (COVID-19) pandemic. The sudden loss of livelihood and lack of access to health care and social protection intensified the vulnerabilities of sex workers, especially those living with HIV. In response, Ashodaya Samithi, an organization of more than 6000 sex workers, launched an innovative programme of assistance in four districts in Karnataka. Since access to antiretroviral therapy (ART) was immediately disrupted, Ashodaya adapted its HIV outreach programme to form an alternative, community-led system of distributing ART at discreet, private sites. WhatsApp messaging was used to distribute information on accessing government social benefits made available in response to the COVID-19 pandemic. Other assistance included advisory messages posted in WhatsApp groups to raise awareness, dispel myths and mitigate violence, and regular, discreet phone check-ins to follow up on the well-being of members. The lessons learnt from these activities represent an important opportunity to consider more sustainable approaches to the health of marginalized populations that can enable community organizations to be better prepared to respond to other public health crises as they emerge.
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Papers by Robert Lorway