title: I. The avirulence of the cultivated Y strain of Trypanosoma cruzi.
mesh_terms: D000818:Animals; D014355:Chagas Disease / Q000517:prevention & control*; D004285:Dogs; D005260:Female; D008297:Male; D051379:Mice; D014349:Trypanosoma cruzi / Q000472:pathogenicity*; D014612:Vaccines
chemical_list: D014612:Vaccines