Condom use among female sex workers and their non-commercial partners: effects of a sexual risk intervention in two Mexican cities.

The purpose of this study was to examine whether a brief behavioural intervention promoting condom use among female sex workers (FSWs) and their clients had the added benefit of increasing condom use among FSWs and their steady, non-commercial partners (e.g. husbands, boyfriends). Participants were 362 FSWs, aged ≥18 years, living in Tijuana or Ciudad Juarez, Mexico, who received a behavioural intervention to promote condom use with clients. Repeated-measures negative binomial regression was used to assess FSWs' condom use with steady partners versus clients across time. Results showed that FSWs engaged in unprotected sex with steady partners more than with their clients, and that the intervention changed FSWs' condom use with clients but not their steady partners. HIV-prevention interventions for FSWs should promote consistent condom use across partner type. Targeting couples rather than individuals may also be necessary.

Risk factors associated with chlamydia and gonorrhoea infection among female sex workers in two Mexico-USA border cities.

Female sex workers (FSWs) aged ≥18 years without known HIV infection living in Tijuana and Ciudad Juarez, Mexico who had recent unprotected sex with clients underwent interviews and testing for chlamydia and gonorrhoea using nucleic acid amplification. Correlates of each infection were identified with logistic regression. Among 798 FSWs, prevalence of chlamydia and gonorrhoea was 13.0% and 6.4%, respectively. Factors independently associated with chlamydia were younger age, working in Tijuana versus Ciudad Juarez and recent methamphetamine injection. Factors independently associated with gonorrhoea were working in Tijuana versus Ciudad Juarez, using illegal drugs before or during sex, and having a recent male partner who injects drugs. Chlamydia and gonorrhoea infection were more closely associated with FSWs' drug use behaviours and that of their sexual partners than with sexual behaviours. Prevention should focus on subgroups of FSWs and their partners who use methamphetamine and who inject drugs.

[A technical experimental model for esophageal anastomosis in rabbits]. / Modelo técnico experimental para la práctica de anastomosis esofágica en conejos.

This article has as its main objective to divulge the development and optimization of surgical-technical training procedures for pediatric surgeons required to correct esophageal atresias. Included are the esophageal anastomosis techniques used in New Zealand rabbits, proposed as an experimental model, to later be reproduced and therefore decrease morbiletality as a result of insufficient surgical in this field. The approach, diameter and consistency of the esophagus of the experimental model, shows very similar characteristics as those seen in the newborn with esophageal atresia.