title: [The life cycle of Microphallus gracilis Baer, 1943, a parasite of Neomys fodiens in the Pyrenees. Modalities of the transmission of the Digenea in nature (author's transl)].
abstract: Microphallus gracilis develops to the sporocyst stage in the digestive gland of the snail Bythinella reyniesii. The xiphidio-cercaria monostomous, anenterous in type, is liberated in water and actively penetrates a Crustacea Gammarus pulex where it encysts. From the point of view of the transmission ecology, the natural focuses of M. gracilis are composed of two different areas: an area where the parasite multiplies coinciding with biotope Bythinella and an area limited to the length of the river where the parasite spreads.
mesh_terms: D000818:Animals; D003445:Crustacea / Q000469:parasitology; D004197:Disease Reservoirs; D004463:Ecology; D005602:France; D012788:Shrews / Q000469:parasitology*; D012908:Snails / Q000469:parasitology; D014200:Trematoda / Q000033:anatomy & histology / Q000254:growth & development*
vernacular_title: Le cycle biologique de Microphallus gracilis Baer, 1943, parasite de Neomys fodiens dans les Pyrénées. Modalités de la transmission du Digène dans la nature.