title: A trial to induce acquired protection against Schistosoma mansoni by experimental heterophyid infection.
mesh_terms: D000818:Animals; D005260:Female; D006578:Heterophyidae / Q000276:immunology*; D007110:Immunity, Active; D008297:Male; D051379:Mice; D010270:Parasite Egg Count; D012550:Schistosoma mansoni; D012552:Schistosomiasis / Q000276:immunology*; D014201:Trematode Infections / Q000276:immunology*