title: The life history of Pygidiopsis macrostomum Travassos, 1928 (Digenea: Heterophyidae).
abstract: The life history of the trematode Pygidiopsis macrostomum Travassos, 1928 is described for the first time. Rediae and cercariae were obtained from naturally infected snails Heleobia australis (d Orbigny), a new first intermediate host. Metacercariae were found encysted in the mesenteries of three naturally infected guppies, Phalloptychus januarius (Hensel), Jenynsia multidentata (Jenyns) (new host records) and Poecilia vivipara Bloch and Schneider. Experimental infections were successfully completed in the intermediate hosts H. australis and Poe. vivipara reared in the laboratory and hamsters Mesocricetus auratus Waterhouse were utilised as a definitive host.
authors.affiliation: Laboratório de Avaliação e Promoção da Saúde Ambiental, Instituto Oswaldo Cruz-FIOCRUZ,Av. Brasil 4365, 21045-900 Rio de Janeiro, RJ, Brasil.
authors.forename: Susana Balmant Emerique
authors.initials: SB
authors.lastname: Simões
authors.forename: Helene Santos
authors.initials: HS
authors.lastname: Barbosa
authors.forename: Cláudia Portes
authors.initials: CP
authors.lastname: Santos
mesh_terms: D000818:Animals; D006224:Cricetinae; D006578:Heterophyidae / Q000254:growth & development* / Q000648:ultrastructure; D008018:Life Cycle Stages / Q000502:physiology*; D008647:Mesocricetus / Q000469:parasitology*; D008855:Microscopy, Electron, Scanning; D011036:Poecilia / Q000145:classification / Q000469:parasitology*; D012621:Seasons; D012908:Snails / Q000145:classification / Q000469:parasitology*