title: [Experimental Schistosomiases. I. Study of S. mansoni fecondity as regards to its adaptation to different Biomphalaria glabrata strains (author's transl)].
abstract: We compared the infestation of different strains of B. glabrata from Brasil (Recife). Guadeloupe, Martinique and Porto-Rico with 6 to 8 miracidia of S. mansoni (from Recife. We noted the four following points: 1. The planorbid snails from Martinique and Guadeloupe had a low resistance to infestation. 2. The guadeloupean snails showed the lesser rate of positivity and the lower medium amount of emitted cercaries but, in the four strains of snails, the level of the issued cercaries is quite the same. 3. many planorbid snails in the groups studied during more than 2 months, showed significant periodic variations in the emission of cercaries, We thought that those variations might be caused by the alternate maturations of sporocysts born from the same miracidium or from different miracidia. 4. Infestation by S. mansoni had a strong effect on fecondity of the snails but the laid eggs had a normal development.
mesh_terms: D000222:Adaptation, Physiological; D000818:Animals; D001700:Biomphalaria / Q000469:parasitology* / Q000502:physiology; D001938:Brazil; D005298:Fertility; D008395:Martinique; D011647:Puerto Rico; D012550:Schistosoma mansoni; D014900:West Indies
vernacular_title: Schistosomose expérimentale. I. Etude de la fécondité de Schistosoma mansoni en fonction de son adaptation a la souche de Biomphalaria glabrata