title: Immunity to Fasciola hepatica in rats: the effect of different levels of primary exposure on superinfection.
mesh_terms: D000818:Animals; D001344:Autopsy; D005210:Fasciola hepatica / Q000276:immunology*; D005211:Fascioliasis / Q000209:etiology / Q000276:immunology*; D007109:Immunity; D007814:Larva / Q000276:immunology; D051381:Rats