Wim Delva

Published on November 28, 2013 by

Coital frequency and condom use in monogamous and concurrent sexual relationships in Cape Town, South Africa

The importance of concurrency (overlapping sexual partnerships in which sexual intercourse with one partner occurs between two acts of intercourse with another partner) in driving HIV transmission in hyperendemic settings remains controversial. A modelling study concluded that the role of concurrency in accelerating the spread of HIV is dramatically reduced by coital dilution (the reduction in frequency of sex acts per sexual partner, as a result of acquiring additional partners). We recently examined self-reported data on coital frequency and condom use during monogamous and concurrent relationship episodes from a survey in three communities with a high HIV prevalence. A key question in our analysis was if there is evidence for coital dilution and/or increased condom use during episodes of concurrency.

Published on March 18, 2013 by

Editorial: Statistical and epidemiological modelling towards Maximizing ART for Better Health and Zero New HIV Infections

The contributions in this issue of the SACEMA Quarterly focus on different aspects related to TB and incidence of HIV. This editorial focuses on HIV treatment as prevention by presenting the MaxART project (Maximizing ART for Better Health and Zero New HIV Infections). This project pursues the dream of reaching all people in Swaziland who are in need of treatment with an ultimate goal of preparing the country for the possibility of ending the HIV epidemic. SACEMA is one of the members of the MaxART consortium and is involved in various modelling and analysis activities that are presented here.

Published on September 14, 2011 by

Reducing binge drinking to prevent HIV among mineworkers in South Africa

Living in single-sex hostels, separated from their girlfriends, wives and children, and with few or no alternative to turn to, binge drinking and commercial or sex are common choices for recreation among mineworkers in Southern Africa. Binge drinking facilitates the acquisition and transmission of HIV and other sexually transmitted infections due to increased sexual risk behaviour. To explore the potential of preventing new HIV infections among mineworkers by reducing binge drinking in this population, a mathematical model was developed that aims to capture the causal associations between binge drinking, sexual risk behaviours and HIV incidence.

Published on November 21, 2010 by

How supportive is the social network of AIDS orphans and other orphaned children in Conakry and N’Zérékoré, Guinea?

AIDS orphans face far greater financial, educational and psychosocial challenges to their development than their peers with healthy living parents. A cross-sectional survey was conducted, assessing the level and nature of abuse and neglect experienced by AIDS orphans in Conakry and N’Zérékoré, Guinea. Additionally, the degree of perceived social support in children whose parents were still alive and not perceived to be HIV positive, children orphaned by causes other than AIDS, and children orphaned by AIDS was explored. The results suggest that experiences of abuse and neglect are common in AIDS-orphaned children, and that adequate social support from family members is often lacking. However, social vulnerability was not limited to children orphaned due to AIDS. Scaled-up, non-discriminatory interventions to improve the psychosocial well-being of AIDS orphans and other vulnerable children are therefore urgently needed, and should be complemented with sound monitoring and evaluation of their effectiveness, scalability and affordability.

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