Incidence of Symptomatic and Asymptomatic Leishmania donovani Infections in High-Endemic Foci in India and Nepal: A Prospective Study

Bart Ostyn, Kamlesh Gidwani, Basudha Khanal, Albert Picado, François Chappuis, Shri Prakash Singh, Suman Rijal, Shyam Sundar and Marleen Boelaert

PLOS Neglected Tropical Diseases, 2011, vol. 5, issue 10, 1-7

Abstract: Incidence of Leishmania donovani infection and Visceral Leishmaniasis (VL) was assessed in a prospective study in Indian and Nepalese high-endemic villages. DAT-seroconversion was used as marker of incident infection in 3 yearly surveys. The study population was followed up to month 30 to identify incident clinical cases. In a cohort of 9034 DAT-negative individuals with neither active signs nor history of VL at baseline, 42 VL cases and 375 asymptomatic seroconversions were recorded in the first year, giving an infection∶disease ratio of 8.9 to 1. In the 18 months' follow-up, 7 extra cases of VL were observed in the seroconverters group (N = 375), against 14 VL cases among the individuals who had not seroconverted in the first year (N = 8570) (RR = 11.5(4.5

Date: 2011
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pntd00:0001284

DOI: 10.1371/journal.pntd.0001284

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