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Título

Study on the experimental susceptibility of two Cernuella species (Mollusca: Stylommatophora) to Dicrocoelium dendriticum (Digenea)

AutorManga-González, M. Yolanda ; González Lanza, Camino ; Pozo Carnero, María Paz del
Fecha de publicación1998
EditorField Museum of Natural History
CitaciónAbstracts of the World Congress of Malacology, pp.205 (1998)
ResumenThe small liver fluke Dicrocoelium dendriticum (Rudolphi, 1819) is the parasite responsible for sheep and cattle dicrocoeliosis in various parts of the world. Several species of land mollusks and ants are its first and second intermediate hosts, respectively. The experimental susceptibiity of two species of Cernuella (Stylommatophora) to D. dendriticum was studied to understand the natural infection data and dicroceliosis epidemiology. Two batches of 150 C. (C.) virgata (Da Costa, 1778) and 70 C. (Microxeromagna) vestita (Rambur, 1868) specimens were tested with doses of 60 and 20 D. dendriticum eggs per mollusk, respectively. These mollusks were maintained under laboratory conditions (22.2°C ± 0.18 SE; 42.4% ± 0.30 relative humidity) and killed periodically. [The following results concerning C. (C.) virgata are marked by one asterisk (*); those of C. (M) vestita by two (**).] D. dendriticum hatched eggs were observed inthe feces eliminated by 34.6%* d 357%** of the mollusks. The parasite was detected using the stereomicroscope in 36%* and 24.8%* * of the snails. The first observation of D. dendriticum (daughter sporocysts with undifferentiated germinal masses) in the mollusks was on day 61 * post-infection (p. i.) and 62* * p. i. Sporocysts with developed cercariae were observed in C. (C.) virgata from day 135p. i. until the end of the experiment (167 p.i.), while only inmature cercariae were detected in C. (M.) vestita until day 132 p.i.
Descripción1 page.-- Contributed to: World Congress of Malacology, Washington, DC, 25-30 July, 1998
Versión del editorhttp://www.unitasmalacologica.org/congress.html
URIhttp://hdl.handle.net/10261/22189
ISBN0-914868-22-5
Aparece en las colecciones: (IGM) Comunicaciones congresos
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