Biomphalaria pfeifferi (Gastropoda: Planorbidae) in Lake Malawi and Upper Shire River, Mangochi District, Malawi: Distribution, Genetic Diversity and Pre-Patent Schistosome Infections. Alharbi MH, Condemine C, Hesketh J, Kayuni SA, Arme TM, Archer J, Jones S, LaCourse EJ, Makaula P, Musaya J, Stothard JR,
