Epidemiology of Leishmania donovani infection in high-transmission foci in Nepal
Nepal reports a visceral leishmaniasis (VL) incidence of 5 per 10 000 per year on the basis of notification by health facilities, but little community-based epidemiological information exists. We report data on prevalence rates of Leishmania donovani infection in ten communities in East Nepal. Methods
Ten clusters with highest VL incidence rates were purposefully selected in Nepal. All households were mapped and socio-demographic data and data on past VL incidence were collected. An exhaustive serological survey was performed of individuals aged >2 years, by collecting finger prick blood on filter paper in November–December 2006. The samples were tested by direct agglutination, and a titre ≥1:1600 was taken as marker of infection. A generalized estimating equation (GEE) model was used to assess risk factors for Direct Agglutination Test (DAT) positivity taking into account the clustering at household and village level. Results
The sero-survey (n = 5397) showed an infection prevalence rate of 9%, (range 5–15% per cluster) with higher prevalence in men (9.9%) than in women (8.3%) (P = 0.049). Male gender, increasing age and poverty were significant risk factors in the final GEE model. Conclusion
Leishmania infection rate in high-transmission areas in Nepal is associated with gender, age and socio-economic status.
Document Type: Research Article
Affiliations: 1: B.P. Koirala Institute of Health Sciences, Ghopa, Dharan, Nepal 2: Division of International and Humanitarian Medicine, Geneva University Hospitals, Geneva, Switzerland 3: London School of Hygiene and Tropical Medicine, London, UK 4: Department of Public Health, Institute of Tropical Medicine, Antwerp, Belgium
Publication date: July 1, 2010