Fasciola hepatica has a complex life cycle that includes a limnid snail as an intermediate host, where larval parthenogenetic multiplication occurs. We performed an experimental study of the life cycle of F. hepatica and estimated its potential biotic (r) in Galba truncatula. We selected 215 of these snails, and infected them with miracidia obtained at 26 ° C in the presence of light. We proceeded to dissect five snails every three days. By tracking the number of stages of F. hepatica by light microscopy observing external characteristics and development time of miracidia, sporocyst, rediae, and cercariae. We noted that the exponential growth model is best suited to the dynamics of F. hepatica. With a biotic potential of 6.69%, an average of 203 cercariae per miracidium and 270 cercariae per snail.

Fasciola hepatica is a digenean that has a complex life cycle which includes a vertebrate host in which its sexual reproduction occurs, verifiable in experimental animals. The objective of this study was to estimate the invasive power (PI), extension invasion (EI) and the biotic potential of this digenean in Rattus norvegicus albinus Holtzman strain, infected experimentally with F. hepatica's metacercariae which was obtained from infected snails in nature, in two provinces. Twenty metacercariae were administered in semisolid diet to six specimens of R. norvegicus, which were maintained in bioterio under controlled environmental conditions. We made coproparasitological analysis by simple concentration and sedimentation technique from the 86 to 100 days post infection and then proceeded with necropsies. We observed that the average production of eggs by adult F. hepatica was 9135.70 ± 219...

Galba truncatula snails were obtained from January to April 2011, from a sub urban biotope (Huayllapampa) district of San Jeronimo, Cusco, Peru, and considered hyperendemic. They were grown in an aquatic environment. They were experimentally infected (n= 215) with miracidia of Fasciola hepatica. The eggs were obtained from the gallbladder and bile ducts of three sheep with fasciolosis, screened and washed in boiled water cooled to incubate at a constant temperature of 26°C. The resulting collection of snails had an abundance of catch per unit effort of 150/h. Shells ranged between: 3.5 to 7.0 mm long, 2.2 to 3.6 mm in width. A survival 75.81%, of which 71.78% showed infection with F. hepatica was noted.