Studies were conducted on the epizootiology of ruminant fascioliasis of two areas essentially with two different types of husbandry. Observation on snail related aspects of the transmission revealed that Lymnaea auricularia was the snail host for Fasciola gigantica. The transmission in two permanent habitats occurs at least throughout most of the year. The observations on the definitive host population of cattle and sheep revealed a high prevalence of fascioliasis but that the intensity of infection was generally rather low.