chagas disease trypanosoma cruzi 56 article 52 Trypanosoma cruzi 48 priority journal 46 nonhuman 40 Support, Non-U.S. Gov't 38 Animal 36 Chagas Disease 36 human 36 Human 34 Trypanosoma 24 Animals 20 Molecular Sequence Data 20 Amino Acid Sequence 18 Antigens, Protozoan 18 Triatoma 18 Antibodies, Protozoan 16 Argentina 14 Ribosomal Proteins 14 argentina 14 controlled study 14 triatoma infestans 14 Chagas Cardiomyopathy 12 Comparative Study 12 Insect Vectors 12 Triatoma infestans 12 amino acid sequence 12 protozoon 12 Chagas' disease 10