title: Acquired immunity and age resistance in rats with chronic fascioliasis.
mesh_terms: D000367:Age Factors; D000818:Animals; D001652:Bile Ducts; D001835:Body Weight; D002908:Chronic Disease; D005210:Fasciola hepatica / Q000302:isolation & purification; D005211:Fascioliasis / Q000276:immunology*; D007110:Immunity, Active; D008099:Liver; D008297:Male; D051381:Rats; D013997:Time Factors