Resistance toFasciola hepaticain sheep harbouring primarySchistosoma bovisinfections

Abstract
A substantial level of resistance to a lictcrologous challenge with Fasciola hepatica was demonstrated insheep harbouring primary non-patent (two- to three-week-old) and newly patent (seven- to cight-wcck-old)Schistosoma hovis infections, the liver-fluke burdens being reduced by 70% and 93%, respectively, ( p< 0·01) inthese groups compared with that of the challenge control group.