Document Detail

Comparison of schistosome transmission in a single- and a double-cropped area in the rice irrigation scheme, 'Office du Niger', Mali.
MedLine Citation:
PMID:  15158685     Owner:  NLM     Status:  MEDLINE    
Rice is becoming increasingly important as a staple food in West Africa and there is a need to increase production to meet the demand and one way to achieve this is to harvest two annual crops. It is possible that such intensified irrigation could affect transmission of schistosomes and this study attempts to compare schistosome transmission in single and double-cropped areas of an irrigation scheme, 'Office du Niger', in Mali. Double cropping has been practised for some years in the Niono area while in the Kolongotomo area still only a single crop is grown. Parasitological surveys conducted in 10 villages (5 from each of these 2 areas) showed that Schistosoma haematobium was less prevalent in the area with single cropping than in the area with double cropping. In order to compare transmission patterns between the two areas, all human-water contact sites around four villages (two from each area) were identified and included in transmission studies. From August 1996 to June 1997, eight surveys were conducted, at intervals of approximately 45 days, in each of these sites to record density of the intermediate hosts, density of infected snails, environmental factors (especially density of aquatic macrophytes), and frequency of human-water contacts. Although the data provide useful information on transmission patterns in Niono and Kolongotomo areas, they fail to demonstrate clear-cut differences in snail population dynamics and transmission patterns between the two areas. A key element in snail habitats in both areas is the abundance of aquatic macrophytes, especially the submerged species. Snail control using environmental modification should focus on controlling these plants in human-water contact sites.
G Coulibaly; M Diallo; H Madsen; A Dabo; M Traoré; S Keita
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Acta tropica     Volume:  91     ISSN:  0001-706X     ISO Abbreviation:  Acta Trop.     Publication Date:  2004 Jun 
Date Detail:
Created Date:  2004-05-25     Completed Date:  2004-08-31     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0370374     Medline TA:  Acta Trop     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  15-25     Citation Subset:  IM    
Institut National de Recherche en Santé Publique, B.P. 1771, Bamako, Mali.
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MeSH Terms
Biomphalaria / growth & development,  parasitology
Bulinus / growth & development,  parasitology
Mali / epidemiology
Oryza sativa / growth & development*
Plants / growth & development
Schistosoma haematobium / isolation & purification
Schistosoma mansoni / isolation & purification
Schistosomiasis haematobia / parasitology,  transmission*
Schistosomiasis mansoni / parasitology,  transmission*
Water / parasitology*
Reg. No./Substance:

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