The Relative Suitability of Sheep and Cattle as Hosts for the Liver Fluke, Fasciola hepatica L.

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Abstract
The suitability of sheep and cattle as hosts for Fasciola hepatica was compared after infection with metacercariae of ovine or bovine origin. It was found that, irrespective of the host of origin, the prepatent periods and the infectivity in both hosts were similar. The flukes in the sheep grew faster, more uniformly and to a greater size, but the individual parasites in the cattle produced approximately twice as many eggs per day as those in the sheep.