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Featured researches published by Sharon Tsui.


Aids Care-psychological and Socio-medical Aspects of Aids\/hiv | 2011

Sexual and physical violence against female sex workers in Kenya: a qualitative enquiry

Jerry Okal; Matthew Chersich; Sharon Tsui; Elizabeth G. Sutherland; Marleen Temmerman; Stanley Luchters

Abstract Few studies in Africa provide detailed descriptions of the vulnerabilities of female sex workers (FSW) to sexual and physical violence, and how this impacts on their HIV risk. This qualitative study documents FSWs experiences of violence in Mombasa and Naivasha, Kenya. Eighty-one FSW who obtained clients from the streets, transportation depots, taverns, discos and residential areas were recruited through local sex workers trained as peer counsellors to participate in eight focus-group discussions. Analysis showed the pervasiveness of sexual and physical violence among FSW, commonly triggered by negotiation around condoms and payment. Pressing financial needs of FSW, gender-power differentials, illegality of trading in sex and cultural subscriptions to mens entitlement for sex sans money underscore much of this violence. Sex workers with more experience had developed skills to avoid threats of violence by identifying potentially violent clients, finding safer working areas and minimising conflict with the police. Addressing violence and concomitant HIV risks and vulnerabilities faced by FSW should be included in Kenyas national HIV/AIDS strategic plan. This study indicates the need for multilevel interventions, including legal reforms so that laws governing sex work promote the health and human rights of sex workers in Kenya.


The European Journal of Contraception & Reproductive Health Care | 2011

Contraceptive needs of female sex workers in Kenya – A cross-sectional study

Elizabeth G. Sutherland; Jane Alaii; Sharon Tsui; Stanley Luchters; Jerry Okal; Nzioke King'ola; Marleen Temmerman; Barbara Janowitz

Background and objectives Female sex workers (FSWs) are thought to be at heightened risk for unintended pregnancy, although sexual and reproductive health interventions reaching these populations are typically focused on the increased risk of sexually transmitted infections. The objective of this study of FSWs in Kenya is to document patterns of contraceptive use and unmet need for contraception. Methods This research surveys a large sample of female sex workers (N = 597) and also uses qualitative data from focus group discussions. Results The reported level of modern contraceptives in our setting was very high. However, like in other studies, we found a great reliance on male condoms, coupled with inconsistent use at last sex, which resulted in a higher potential for unmet need for contraception than the elevated levels of modern contraceptives might suggest. Dual method use was also frequently encountered in this population and the benefits of this practice were clearly outlined by focus group participants. Conclusion These findings suggest that the promotion of dual methods among this population could help meet the broader reproductive health needs of FSWs. Furthermore, this research underscores the necessity of considering consistency of condom use when estimating the unmet or undermet contraceptive needs of this population.


AIDS | 2015

Incomplete adherence among treatment-experienced adults on antiretroviral therapy in Tanzania Uganda and Zambia.

Julie A. Denison; Olivier Koole; Sharon Tsui; Joris Menten; Kwasi Torpey; Eric van Praag; Ya Diul Mukadi; Robert Colebunders; Andrew F. Auld; Simon Agolory; Jonathan E. Kaplan; Modest Mulenga; Gideon Kwesigabo; Fred Wabwire-Mangen; David R. Bangsberg

Objectives:To characterize antiretroviral therapy (ART) adherence across different programmes and examine the relationship between individual and programme characteristics and incomplete adherence among ART clients in sub-Saharan Africa. Design:A cross-sectional study. Methods:Systematically selected ART clients (≥18 years; on ART ≥6 months) attending 18 facilities in three countries (250 clients/facility) were interviewed. Client self-reports (3-day, 30-day, Case Index ≥48 consecutive hours of missed ART), healthcare provider estimates and the pharmacy medication possession ratio (MPR) were used to estimate ART adherence. Participants from two facilities per country underwent HIV RNA testing. Optimal adherence measures were selected on the basis of degree of association with concurrent HIV RNA dichotomized at less than or greater/equal to 1000 copies/ml. Multivariate regression analysis, adjusted for site-level clustering, assessed associations between incomplete adherence and individual and programme factors. Results:A total of 4489 participants were included, of whom 1498 underwent HIV RNA testing. Nonadherence ranged from 3.2% missing at least 48 consecutive hours to 40.1% having an MPR of less than 90%. The percentage with HIV RNA at least 1000 copies/ml ranged from 7.2 to 17.2% across study sites (mean = 9.9%). Having at least 48 consecutive hours of missed ART was the adherence measure most strongly related to virologic failure. Factors significantly related to incomplete adherence included visiting a traditional healer, screening positive for alcohol abuse, experiencing more HIV symptoms, having an ART regimen without nevirapine and greater levels of internalized stigma. Conclusion:Results support more in-depth investigations of the role of traditional healers, and the development of interventions to address alcohol abuse and internalized stigma among treatment-experienced adult ART patients.


Tropical Medicine & International Health | 2014

Retention and risk factors for attrition among adults in antiretroviral treatment programmes in Tanzania, Uganda and Zambia

Olivier Koole; Sharon Tsui; Fred Wabwire-Mangen; Gideon Kwesigabo; Joris Menten; Modest Mulenga; Andrew F. Auld; Simon Agolory; Ya Diul Mukadi; Robert Colebunders; David R. Bangsberg; Eric van Praag; Kwasi Torpey; Seymour Williams; Jonathan E. Kaplan; Aaron Zee; Julie A. Denison

We assessed retention and predictors of attrition (recorded death or loss to follow‐up) in antiretroviral treatment (ART) clinics in Tanzania, Uganda and Zambia.


Morbidity and Mortality Weekly Report | 2015

Lower levels of antiretroviral therapy enrollment among men with HIV compared with women - 12 countries, 2002-2013

Andrew F. Auld; Ray W. Shiraishi; Francisco Mbofana; Aleny Couto; Ernest Benny Fetogang; Shenaaz El-Halabi; Refeletswe Lebelonyane; Pilatwe T lhagiso Pilatwe; Ndapewa Hamunime; Velephi Okello; Tsitsi Mutasa-Apollo; Owen Mugurungi; Joseph Murungu; Janet Dzangare; Gideon Kwesigabo; Fred Wabwire-Mangen; Modest Mulenga; Sebastian Hachizovu; Virginie Ettiegne-Traore; Fayama Mohamed; Adebobola Bashorun; Do T hi Nhan; Nguyen H uu Hai; Tran H uu Quang; Joelle Deas Van Onacker; Kesner Francois; Ermane Robin; Gracia Desforges; Mansour Farahani; Harrison Kamiru

Equitable access to antiretroviral therapy (ART) for men and women with human immunodeficiency virus (HIV) infection is a principle endorsed by most countries and funding bodies, including the U.S. Presidents Emergency Plan for AIDS (acquired immunodeficiency syndrome) Relief (PEPFAR) (1). To evaluate gender equity in ART access among adults (defined for this report as persons aged ≥15 years), 765,087 adult ART patient medical records from 12 countries in five geographic regions* were analyzed to estimate the ratio of women to men among new ART enrollees for each calendar year during 2002-2013. This annual ratio was compared with estimates from the Joint United Nations Programme on HIV/AIDS (UNAIDS)(†) of the ratio of HIV-infected adult women to men in the general population. In all 10 African countries and Haiti, the most recent estimates of the ratio of adult women to men among new ART enrollees significantly exceeded the UNAIDS estimates for the female-to-male ratio among HIV-infected adults by 23%-83%. In six African countries and Haiti, the ratio of women to men among new adult ART enrollees increased more sharply over time than the estimated UNAIDS female-to-male ratio among adults with HIV in the general population. Increased ART coverage among men is needed to decrease their morbidity and mortality and to reduce HIV incidence among their sexual partners. Reaching more men with HIV testing and linkage-to-care services and adoption of test-and-treat ART eligibility guidelines (i.e., regular testing of adults, and offering treatment to all infected persons with ART, regardless of CD4 cell test results) could reduce gender inequity in ART coverage.


PLOS ONE | 2016

Reasons for Missing Antiretroviral Therapy: Results from a Multi-Country Study in Tanzania, Uganda, and Zambia

Olivier Koole; Julie A. Denison; Joris Menten; Sharon Tsui; Fred Wabwire-Mangen; Gideon Kwesigabo; Modest Mulenga; Andrew F. Auld; Simon Agolory; Ya Diul Mukadi; Eric van Praag; Kwasi Torpey; Seymour Williams; Jonathan E. Kaplan; Aaron Zee; David R. Bangsberg; Robert Colebunders

Objectives To identify the reasons patients miss taking their antiretroviral therapy (ART) and the proportion who miss their ART because of symptoms; and to explore the association between symptoms and incomplete adherence. Methods Secondary analysis of data collected during a cross-sectional study that examined ART adherence among adults from 18 purposefully selected sites in Tanzania, Uganda, and Zambia. We interviewed 250 systematically selected patients per facility (≥18 years) on reasons for missing ART and symptoms they had experienced (using the HIV Symptom Index). We abstracted clinical data from the patients’ medical, pharmacy, and laboratory records. Incomplete adherence was defined as having missed ART for at least 48 consecutive hours during the past 3 months. Results Twenty-nine percent of participants reported at least one reason for having ever missed ART (1278/4425). The most frequent reason was simply forgetting (681/1278 or 53%), followed by ART-related hunger or not having enough food (30%), and symptoms (12%). The median number of symptoms reported by participants was 4 (IQR: 2–7). Every additional symptom increased the odds of incomplete adherence by 12% (OR: 1.1, 95% CI: 1.1–1.2). Female participants and participants initiated on a regimen containing stavudine were more likely to report greater numbers of symptoms. Conclusions Symptoms were a common reason for missing ART, together with simply forgetting and food insecurity. A combination of ART regimens with fewer side effects, use of mobile phone text message reminders, and integration of food supplementation and livelihood programmes into HIV programmes, have the potential to decrease missed ART and hence to improve adherence and the outcomes of ART programmes.


Aids Care-psychological and Socio-medical Aspects of Aids\/hiv | 2011

Indian married men's interest in microbicide use.

Rewa Kohli; Sharon Tsui; Sanjay Mehendale; Elizabeth E. Tolley

Abstract Research suggests that the HIV/AIDS epidemic has spread to monogamous women in India. Gender inequalities prevent women from asserting control over the circumstances that increase their vulnerability to infection. Men control most of the sexual decision-making. The present study explores views on use of microbicides by men and circumstances in which they might find microbicide use with their wives acceptable. Progressive in-depth interviews were conducted among 15 consenting men from Pune, India. Men felt that women with identifiable HIV risk, such as being a sex worker, having an HIV infected husbands or being educated; were more likely to use microbicides. Most high-risk men would permit or force their wives to use microbicides and had a higher intention to use microbicides compared with low-risk men probably due to perceived susceptibility. The majority of men with previous experience of microbicide use mentioned that privacy was important for gel use. Most low-risk men believed that they would be angry with covert gel use by their wives. They felt that covert use was impossible since their wives were under their control and they would notice the gel due to a change in their sexual experience. Low-risk men also opined that husbands permission was not required if he was HIV-infected or having extra-marital sex. Some men stressed the need for exercising sexual control while women inserted gel before sex. Mens risk-perception, knowledge about their safety concerns, as well as their behavior may affect acceptability of gel use, hence mens involvement and cooperation is imperative for microbicide gel use by women in India.


Aids and Behavior | 2012

Predicting Product Adherence in a Topical Microbicide Safety Trial in Pune, India

Elizabeth E. Tolley; Sharon Tsui; Sanjay Mehendale; Mark A. Weaver; Rewa Kohli

The inconclusive results of past trials and recent findings of partial protection of Tenofovir 1% gel underscore the need to better understand product adherence in microbicide trials. This study aimed to identify factors predicting couples’ ability to sustain topical gel and condom use during clinical trial participation. We enrolled 100 Indian participants of a randomized, controlled safety trial of Tenofovir 1% gel (CT cohort) and 100 similar women who were ineligible or declined trial participation (NCT cohort). Compared to the NCT cohort, CT women reported higher baseline condom use, more positive attitudes towards condoms and higher levels of protection efficacy. While NCT condom use remained low, CT condom use increased dramatically during the study. Reported gel consistency was higher than condom consistency. Individual and couple-related factors predicted condom consistency and interest in future gel use, but not gel consistency. Findings could inform trial recruitment strategies and product introduction.


PLOS ONE | 2016

Epidemiology and Surveillance of Influenza Viruses in Uganda between 2008 and 2014

Fred Wabwire-Mangen; Derrick Mimbe; Bernard Erima; Edison Mworozi; Monica Millard; Hannah Kibuuka; Luswa Lukwago; Josephine Bwogi; Jocelyn Kiconco; Titus Tugume; Sophia Mulei; Christine Ikomera; Sharon Tsui; Stephen Malinzi; Simon Kasasa; Rodney Coldren; Denis K. Byarugaba

Introduction Influenza surveillance was conducted in Uganda from October 2008 to December 2014 to identify and understand the epidemiology of circulating influenza strains in out-patient clinic attendees with influenza-like illness and inform control strategies. Methodology Surveillance was conducted at five hospital-based sentinel sites. Nasopharyngeal and/or oropharyngeal samples, epidemiological and clinical data were collected from enrolled patients. Real-time reverse transcription polymerase chain reaction (RT-PCR) was performed to identify and subtype influenza strains. Data were double-entered into an Epi Info 3.5.3 database and exported to STATA 13.0 software for analysis. Results Of the 6,628 patient samples tested, influenza virus infection was detected in 10.4% (n = 687/6,628) of the specimens. Several trends were observed: influenza circulates throughout the year with two peaks; the major one from September to November and a minor one from March to June. The predominant strains of influenza varied over the years: Seasonal Influenza A(H3) virus was predominant from 2008 to 2009 and from 2012 to 2014; Influenza A(H1N1)pdm01 was dominant in 2010; and Influenza B virus was dominant in 2011. The peaks generally coincided with times of higher humidity, lower temperature, and higher rainfall. Conclusion Influenza circulated throughout the year in Uganda with two major peaks of outbreaks with similar strains circulating elsewhere in the region. Data on the circulating strains of influenza and its patterns of occurrence provided critical insights to informing the design and timing of influenza vaccines for influenza prevention in tropical regions of sub-Saharan Africa.


Journal of the International AIDS Society | 2017

To err is human, to correct is public health: a systematic review examining poor quality testing and misdiagnosis of HIV status

Cheryl Johnson; Virginia Fonner; Anita Sands; Nathan Ford; Carla Mahklouf Obermeyer; Sharon Tsui; Vincent Wong; Rachel Baggaley

Introduction: In accordance with global testing and treatment targets, many countries are seeking ways to reach the “90‐90‐90” goals, starting with diagnosing 90% of all people with HIV. Quality HIV testing services are needed to enable people with HIV to be diagnosed and linked to treatment as early as possible. It is essential that opportunities to reach people with undiagnosed HIV are not missed, diagnoses are correct and HIV‐negative individuals are not inadvertently initiated on life‐long treatment. We conducted this systematic review to assess the magnitude of misdiagnosis and to describe poor HIV testing practices using rapid diagnostic tests.

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Andrew F. Auld

Centers for Disease Control and Prevention

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Modest Mulenga

Zambian Ministry of Health

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Kwasi Torpey

College of Health Sciences

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Joris Menten

Institute of Tropical Medicine Antwerp

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Jonathan E. Kaplan

Centers for Disease Control and Prevention

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