title: Trypanosoma lewisi: duration of immune state in rats.
mesh_terms: D000818:Animals; D005260:Female; D007110:Immunity, Active; D051381:Rats; D011919:Rats, Inbred Strains; D013997:Time Factors; D014350:Trypanosoma lewisi / Q000276:immunology*; D014352:Trypanosomiasis / Q000276:immunology