The editors of the SACEMA quarterly

The editors

Alex Welte

Since 1 July 2010 Alex Welte is the Director of SACEMA. He has moved to Stellenbosch from the Computational and Applied Mathematics (CAM) at the University of the Witwatersrand.

After receiving his PhD in Physics at the University of Pennsylvania (1998), Dr Alex Welte completed a Postdoctoral Fellowship in the Pennsylvania Physics Department focusing on developing database systems for social and medical data. He then returned to South Africa to be involved in a major epidemiological and demographic study in rural KwaZulu Natal with the Africa Centre at the University of KwaZulu Natal. The study focused on the HIV epidemic in the region. After that he started lecturing at Wits and during that time was involved in various SACEMA projects as Senior Scientific Advisor, including supervising several SACEMA students.

Alex’s research interests lie in the areas of population dynamics, quantum mechanics and computational methods.

John Hargrove

John Hargrove was director of SACEMA from early 2006 until 1 July 2010. He now works as a Senior Research Fellow at SACEMA, focussing on his research in the area of tsetse fly and trypanosomiasis biology and control. John has worked for more than 30 years in this area, applying mathematical analytical and modelling techniques in the field of physiology, behaviour and population dynamics. During that time he had wide experience of managing a major research establishment and balancing the demands of international funding agencies, scientific researchers and technical staff.

Over the past several years he has been involved in the analysis and modelling of HIV/AIDS data in his native Zimbabwe. His particular current interests are in analysing, interpreting and modelling the declining HIV prevalence levels in Zimbabwe, which he detected first in 2004, and in developing mathematical adjustments of use in estimating HIV incidence from cross- sectional surveys.

Wim Delva

Wim Delva trained as a medical doctor and obtained a PhD degree at Ghent University in Belgium. In 2008 he moved to Cape Town, South Africa, and since June 2012 he is the deputy director of SACEMA.

Wim also has a part-time research appointment at Ghent University’s International Centre for Reproductive Health. His research involves the application of statistical, epidemiological and mathematical modelling techniques to describe and analyse the behavioural and biological processes underlying generalised HIV epidemics in sub-Saharan Africa, and his current research centres around the role of age disparate and overlapping relationships in the spread of HIV in Southern Africa, and the potential impact of early HIV treatment on the prevalence and incidence of HIV.

Annette Gerritsen

Annette Gerritsen was professionally trained in epidemiology in The Netherlands. She obtained her PhD from the Vrije Universiteit in Amsterdam, reporting on a randomized controlled clinical trial on the treatment of carpal tunnel syndrome. After that she has been involved in research studies focussing on the health and health care use of refugees, asylum seekers and other migrants in the Netherlands. In 2007 she moved to South Africa to work as a senior lecturer in epidemiology and biostatistics at the University of Venda, Thohoyandou, where she coordinated the Master of Public Health program. In 2008 she founded Epi Result, a company specializing in design, analysis and reporting of epidemiological studies. Her research areas of interest include: infectious diseases (HIV, TB, malaria, diarrhoea), migration and health, with her main interest being the research methodology.