Spatial-temporal variations of Schistosoma japonicum distribution after an integrated national control strategy: a cohort in a marshland area of ChinaReportar como inadecuado




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BMC Public Health

, 13:297

Environmental health

Abstract

BackgroundSchistosomiasis transmission is typically focal. Understanding spatial variations of Schistosoma infections and their associated factors is important to help to invent site-specific intervention strategies.

MethodsA five-year longitudinal study was carried out prospectively in 12 natural villages, Guichi district of Anhui province. A GIS-based spatial analysis was conducted to identify geographic distribution patterns of schistosomiasis infections at the household scale.

ResultsThe results of the spatial autocorrelation analysis for 2005 showed that there were significant spatial clusters of human infections at the household level, and these results were in agreement with that of the spatial scan statistic. As prevalence of infections in humans decreased over the course of control, the spatial distribution of these infections became less heterogeneous.

ConclusionsThe findings imply that it may be necessary to re-assess risk factors of S. japonicum transmission over the course of control and to adjust accordingly control measures in the communities.

KeywordsSchistosomiasis Intervention Geographical information system Spatial-temporal distribution Spatial autocorrelation analysis Spatial scan statistic Schistosoma japonicum Electronic supplementary materialThe online version of this article doi:10.1186-1471-2458-13-297 contains supplementary material, which is available to authorized users.

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