BACKGROUND The high and continually increasing prevalence of human immunodeficiency virus (HIV) and other sexually transmitted diseases among men who have sex with men (MSM) in China underscores the critical importance of examining the exact sexual networks that result in HIV transmission, as well as HIV infection, using powerful sampling methods, such as respondent-driven sampling (RDS), to im...

INTRODUCTION Globally, transgender women sex workers have a high prevalence of HIV and condomless receptive anal intercourse with male clients (CRAIMC). We investigated the prevalence of CRAIMC and factors associated with CRAIMC among transgender women sex workers in China. METHODS In 2014, we anonymously interviewed 220 transgender women sex workers face to face in Shenyang, China. Those who...

Despite continued high HIV risk among Hispanic men who have sex with men (HMSM), culturally tailored, theoretically based interventions have yet to be developed and tested. As a first step toward intervention development, we collected quantitative and qualitative data on sociocultural and psychological factors associated with drug use and risky sex among 566 HMSM recruited from community and In...

introduction: constipation is one of the most common complaints of individuals, which may present with complication like hemorrhoid and fissure. hirschsprung is a disease presenting with chronic constipation and its diagnosis may be delayed until adulthood. it is diagnosed by biopsies from anorectal transitional zone. this study aimed to evaluate the association between hirschsprung and anorect...

OBJECTIVE To assess the reduction in the vaccine preventable burden of cancer in men if boys are vaccinated along with girls against oncogenic human papillomavirus (HPV). DESIGN Bayesian evidence synthesis approach used to evaluate the impact of vaccination against HPV types 16 and 18 on the burden of anal, penile, and oropharyngeal carcinomas among heterosexual men and men who have sex with ...

Sexual dimorphism can be achieved using a variety of mechanisms, including sex-specific circuits and sex-specific function of shared circuits, though how these work together to produce sexually dimorphic behaviors requires further investigation. Here, we explore how components of the sex-shared defecation circuitry are incorporated into the sex-specific male mating circuitry in Caenorhabditis e...

BACKGROUND In the recent years, dramatic increases in HIV transmission among men who have sex with men (MSM) have been observed in China. Human papillomavirus (HPV) infection related anal cancer is more common among HIV-infected MSM as compared to the general population. However, HPV infection and anal cytology has been rarely studied in HIV-infected MSM in China. METHODS HIV-infected MSM in ...

Background Decisions to use condoms are made within partnerships. We examined the associations between inconsistent or no condom use and individual and partnership characteristics. We also examined the relative importance of individual versus partnership factors. Methods Cross-sectional study of heterosexual individuals enrolled from the sexually transmitted infections (STI) outpatient clinic i...

BACKGROUND Young gay and bisexual men may perceive that the consequences of HIV infection have dramatically improved with the availability of highly active antiretroviral therapy. We therefore sought to identify trends in HIV infection rates and associated risk behaviours among young gay and bisexual men in Vancouver. METHODS Prospective cohort study involving gay and bisexual men aged 18-30 ...

Citation: Kelly BC (2016) Reconsidering " Unprotected " and HIV Risk in the Twenty-First Century. A commentary on " Any condomless anal intercourse " is no longer an accurate measure of HIV sexual risk behavior in gay and other men who have sex with men Conceptualizations of HIV risk have changed over the 35 years since the identification of a cluster of mortality among gay men in Los Angeles (...