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Free Content Annual incidence of visceral leishmaniasis in an endemic area of Bihar, India

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Abstract:

Summary

The study presents the findings of a population-based survey of the annual incidence of visceral leishmaniasis (VL) in the rural areas of one VL-endemic district in Bihar, India. Stratified multi-stage sampling was applied in the selection of blocks, villages, hamlets, and households. We screened 15 178 households (91 000 individuals) in 80 villages in 7 of 27 administrative blocks of the district, East Champaran. We identified 227 VL cases that occurred in the past 12 months: 149 treated individuals who survived, 14 who died from VL, and 64 active cases. The high-incidence stratum had an estimated incidence of 35.6 cases per 10 000 persons per year (90% CI: 27.7–45.7). The annual incidence rate in the medium stratum areas was 16.8 cases per 10 000 (90% CI: 9.3–30.6). The combined annual incidence rate for the high and medium areas combined was 21.9 cases per 10 000 per year, (90% CI: 14.0–34.2). The Government of India’s VL elimination goal is to reduce the VL incidence to one case per 10 000 at the sub-district level; thus, a 35-fold reduction will be required in those areas with the highest VL incidence.

Keywords: Bihar; VL-endemic district; annual incidence rate; population-based survey; stratified multi-stage sampling; visceral leishmaniasis

Document Type: Research Article

DOI: https://doi.org/10.1111/j.1365-3156.2010.02517.x

Affiliations: 1:  Rajendra Memorial Research Institute of Medical Sciences, Patna, India 2:  Binghamton University, Binghamton, New York, NY, USA 3:  Institute for OneWorld Health, Geneva, Switzerland 4:  Institute for OneWorld Health, Patna, India 5:  National Institute of Cholera and Enteric Diseases, Kolkata, India 6:  National Institute of Medical Statistics, New Delhi, India 7:  Institute for OneWorld Health, San Francisco, CA, USA

Publication date: 2010-07-01

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