This study is among the first to examine the sexual risk behaviors and attendant factors of young men who have sex with men (YMSM) in Hong Kong using location-aware gay social networking mobile applications ("gay apps"). Among the 213 YMSM (Mage = 21.52, SD = 2.29 years, range 17-25) who reported their recent (past six months) sexual history with male partners and gay apps use, inconsistent con...

Human papillomavirus (HPV) is causally associated with anal cancer, as HPV DNA is detected in up to 90% of anal intraepithelial neoplasias and anal cancers. With the gradual increase of anal cancer rates, there is a growing need to establish reliable and clinically relevant methods to detect anal cancer precursors. In resource-limited settings, HPV DNA detection is a potentially relevant tool f...

PURPOSE In Korea, anal cancer is rare disease entity with specific clinical characteristics. Therefore, no survival analysis with a sufficient patient population has been performed. The aim of this study was to evaluate the characteristics of Korean anal cancer, focusing on the survival according to tumor histologies, sex, and a specific age group, using the nationwide cancer registry. METHOD...

Fishes may show sexual dimorphism according to their reproductive strategies. In some species, this differentiation is already well known. However, with the findings obtained from recent studies, the number of species for which sex can be determined without dissection has increased. Thus far, the presence of external secondary sexual characteristics in Hoplias aimara, a very well-studied specie...

OBJECTIVE To analyse sexual behaviour, HIV testing, HIV testing intentions and reasons for not testing for HIV in university students from Cuzco (Peru). METHODS The sample comprised 1,377 university students from several institutions from Cuzco (Peru). The size of the sample was set according to a maximum 3% error estimation and a 97% confidence interval. Ages ranged from 16 to 30 years old. ...

OBJECTIVE African men who have sex with men often sell sex to men, and MSM who sell sex (MSM-SW) often also have female partners. We compared sexual risk behaviour of MSM-SW who were sexually active with female partners (bisexual MSW) to MSM-SW with only male partners (exclusive MSW). DESIGN Descriptive behavioural study METHODS : A novel, validated daily event and partner diary self-comple...

Quantitative stir bar sorptive extraction methods, both in the aqueous and headspace modes, followed by thermal desorption gas chromatography-mass spectrometry were used to investigate individual variations in the volatile components of male and female ferret (Mustela furo) urine. The urinary profiles were further compared with volatile profiles of anal gland secretions of breeding male and fem...

OBJECTIVES We examined the association between unprotected anal intercourse and sexually transmitted diseases (STDs) among heterosexual women. METHODS In 2006 through 2007, women were recruited from high-risk areas in New York City through respondent-driven sampling as part of the National HIV Behavioral Surveillance study. We used multiple logistic regression to determine the relationship be...

OBJECTIVES The relationship between sexual practices, identity and role among Latino men who have sex with men (MSM) and HIV risk is the subject of ongoing investigation but less is known about how these aspects of sexuality relate to human papilloma-virus (HPV), an independent risk factor for HIV. This observational study investigated the relationship between HPV and sexual practices, identity...

Objectives: To calculate estimates for group level trends among German men who have sex with men (MSM) regarding parameters related to HIV epidemiology: frequency of anal intercourse, consistency in condom use, risk-taking, numbers of sex partners, incident bacterial STIs, and HIV-testing behaviour. Methods: Data derived from six large cross-sectional national follow-up surveys among MSM, condu...