Document Detail

Onchocerciasis transmission levels and Simulium damnosum complex biting activity at riverside and rice field sites in Sierra Leone.
MedLine Citation:
PMID:  2980195     Owner:  NLM     Status:  MEDLINE    
Biting densities of the Simulium damnosum Theobald complex of blackflies and their levels of parasitism by Onchocerca volvulus (Leuckart) were compared at two ecologically contrasted sites in the Southern Province of Sierre Leone, West Africa: by the Tabe riverside close to Gbaiima village where onchocerciasis is hyperendemic (63.1% positive skin-snips) and in open rice fields 2 km from the mesoendemic (54.9%) village of Senehun. Using a combination of morphometric and enzyme electrophoresis techniques, the primary vector was found to belong to the S.sanctipauli subcomplex and was most probably S.soubrense 'B' (sensu Post, 1986). In the wet season biting activity took place throughout the day at the village, but had morning and evening peaks in the rice fields. Transmission of O.volvulus was detected at the village in all months except February-April, while in the rice fields it was detected only during September-November and May at one tenth the level of the village. There was a significant difference between the two sites in the proportion of parous flies carrying third stage larvae in the head, but not of other larval stages.
J B Davies; P A Beech-Garwood; M C Thomson; J E McMahon
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Medical and veterinary entomology     Volume:  2     ISSN:  0269-283X     ISO Abbreviation:  Med. Vet. Entomol.     Publication Date:  1988 Oct 
Date Detail:
Created Date:  1992-04-22     Completed Date:  1992-04-22     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8708682     Medline TA:  Med Vet Entomol     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  357-69     Citation Subset:  IM    
Liverpool School of Tropical Medicine, U.K.
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MeSH Terms
Insect Bites and Stings / complications,  epidemiology*
Insect Vectors / parasitology*
Larva / isolation & purification
Onchocerca / isolation & purification*
Onchocerciasis / transmission*
Sierra Leone / epidemiology
Simuliidae / parasitology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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