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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 96, No. s1, 2001, pp. 75-78
Bioline Code: oc01154
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 96, No. s1, 2001, pp. 75-78

 en Studies on the Biology of Schistosomiasis with Emphasis on the Senegal River Basin
VR Southgate; L-A Tchuem Tchuenté; M Sène; D De Clercq; A Théron; J Jourdane; BL Webster; D Rollinson; B Gryseels & J Vercruysse

Abstract

The construction of the Diama dam on the Senegal river, the Manantali dam on the Bafing river, Mali and the ensuing ecological changes have led to a massive outbreak of Schistosoma mansoni check for this species in other resources in Northern Senegal, associated with high intensity of infections, due to intense transmission, and the creation of new foci of S. haematobium check for this species in other resources . Data on the vectorial capacity of Biomphalaria pfeifferi check for this species in other resources from Ndombo, near Richard Toll, Senegal are presented with sympatric and allopatric (Cameroon) S. mansoni. Comparisons are made on infectivity, cercarial production, chronobiology of cercarial emergence and longevity of infected snails. Recent data on the intermediate host specificity of different isolates of S. haematobium from the Lower and Middle Valley of the Senegal river basin (SRB) demonstrate the existence of at least two strains of S. haematobium. The role of Bulinus truncatus check for this species in other resources in the transmission of S. haematobium in the Lower and Middle Valleys of the SRB is reviewed. Both S. haematobium and S. mansoni are transmitted in the same foci in some areas of the SRB.

Keywords
Schistosoma mansoni, Schistosoma haematobium, Biomphalaria pfeifferi, Senegal river basin

 
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