Intermediate snail hosts of French Fasciola hepatica: Lymnaea neotropica and Lymnaea viatrix are better hosts than local Galba truncatula
- 299 Downloads
Allopatric and sympatric infections of Lymnaea neotropica and Lymnaea viatrix var. ventricosa with Argentinean and French isolates of Fasciola hepatica were carried out to determine the capacity of these snails to produce metacercariae and to verify if this capacity changed with snail generation. The same process was also made with a French population of Galba truncatula known to be highly susceptible to French isolates of the parasite. In each lymnaeid species separately considered, the survival rate at day 30 post-exposure and prevalence of F. hepatica infection in the group infected with Argentinean miracidia were significantly greater than those recorded in the corresponding French one. Compared to infected G. truncatula, both South American lymnaeids had longer patent periods and produced a higher number of metacercariae. The highest infections were noted with L. v. ventricosa. In the three snail species, metacercarial production was more important with the Argentinean isolate of miracidia than with the French one. If three successive generations of L. v. ventricosa are exposed to the same French isolate of miracidia, cercarial production significantly increased from parents to the F2 generation, while the other characteristics of infection only showed insignificant variations. L. neotropica and L. v. ventricosa are better intermediate hosts for French F. hepatica than local G. truncatula. The numerical increase of shed cercariae in the F1 and F2 generations of L. v. ventricosa demonstrates a rapid adaptation of this species to the French isolate of the parasite.
- Bargues MD, Artigas P, Mera y Sierra RL, Pointier JP, Mas-Coma S (2007) Characterisation of Lymnaea cubensis, L. viatrix and L. neotropica n. sp., the main vectors of Fasciola hepatica in Latin America, by analysis of their ribosomal and mitochondrial DNA. Ann Trop Med Parasitol 101:621–641PubMedCrossRefGoogle Scholar
- Reynal JL (2001) Enquête épidémiologique sur les traitements appliqués contre la fasciolose et la paramphistomose bovine dans le Sud-ouest de la Corrèze. Pharm D Thesis, LimogesGoogle Scholar
- Sanabria R, Mouzet R, Pankrác J, Djuikwo Teukeng FF, Courtioux B, Novobilský A, Höglund J, Rašný M, Vignoles P, Dreyfuss G, Rondelaud D, Romero J (2012) Lymnaea neotropica and Lymnaea viatrix, potential intermediate hosts for Fascioloides magna. J Helminthol in pressGoogle Scholar