Distribution patterns and cercarial shedding of Bulinus nasutus and other snails in the Msambweni area, Coast Province, Kenya.
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Date
2004-04Author
Kariuki, HC
Clennon, JA
Brady, MS
Kitron, U
Sturrock, RF
Ouma, JH
Ndzovu, ST
Mungai, P
Hoffman, O
Hamburger, J
Pellegrini, C
Muchiri, EM
King, CH
Type
ArticleLanguage
enMetadata
Show full item recordAbstract
In the Msambweni area of the Kwale District in Kenya, an area endemic for Schistosoma haematobium, potential intermediate-host snails were systematically surveyed in water bodies associated with human contact that were previously surveyed in the 1980s. Bulinus (africanus) nasutus, which accounted for 67% of the snails collected, was the only snail shedding S. haematobium cercariae. Lanistes purpureus was the second most common snail (25%); lower numbers of Bulinus forskalii and Melanoides tuberculata were also recovered. Infection with non-S. haematobium trematodes was found among all snail species. Rainfall was significantly associated with the temporal distribution of all snail species: high numbers of Bulinus nasutus developed after extensive rainfall, followed, in turn, by increased S. haematobium shedding. Spatial distribution of snails was significantly clustered over a range of up to 1 km, with peak clustering observed at a distance of 400 meters. Water lily (Nymphaea spp.) and several aquatic grass species appeared necessary for local colonization by B. nasutus or L. purpureus.
URI
http://www.ncbi.nlm.nih.gov/pubmed/15100463http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/53672
Citation
Am J Trop Med Hyg. 2004 Apr;70(4):449-56.Publisher
University of Nairobi Faculty of medicine
Collections
- Faculty of Health Sciences (FHS) [10387]