title: Studies on the biology of schistosomiasis with emphasis on the Senegal river basin.
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 in Northern Senegal, associated with high intensity of infections, due to intense transmission, and the creation of new foci of S. haematobium. Data on the vectorial capacity of Biomphalaria pfeifferi 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 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.
authors.affiliation: Biomedical Sciences Theme, Department of Zoology, The Natural History Museum, London, UK. V.Southgate@nhm.ac.uk
authors.forename: V
authors.initials: V
authors.lastname: Southgate
authors.forename: L A
authors.initials: LA
authors.lastname: Tchuem Tchuenté
authors.forename: M
authors.initials: M
authors.lastname: Sène
authors.forename: D
authors.initials: D
authors.lastname: De Clercq
authors.forename: A
authors.initials: A
authors.lastname: Théron
authors.forename: J
authors.initials: J
authors.lastname: Jourdane
authors.forename: B L
authors.initials: BL
authors.lastname: Webster
authors.forename: D
authors.initials: D
authors.lastname: Rollinson
authors.forename: B
authors.initials: B
authors.lastname: Gryseels
authors.forename: J
authors.initials: J
authors.lastname: Vercruysse
mesh_terms: D000818:Animals; D001700:Biomphalaria / Q000469:parasitology / Q000502:physiology; D002033:Bulinus / Q000469:parasitology / Q000502:physiology; D004196:Disease Outbreaks; D004199:Disease Vectors; D005618:Fresh Water / Q000469:parasitology*; D006801:Humans; D012548:Schistosoma haematobium / Q000302:isolation & purification* / Q000502:physiology; D012550:Schistosoma mansoni / Q000302:isolation & purification* / Q000502:physiology; D012553:Schistosomiasis haematobia / Q000453:epidemiology / Q000635:transmission*; D012555:Schistosomiasis mansoni / Q000453:epidemiology / Q000635:transmission*; D012675:Senegal / Q000453:epidemiology