Animals 60 Article Chagas disease animal nonhuman 58 Chagas Disease 54 Trypanosoma cruzi 42 transmission 38 human 36 parasitology 36 Argentina 34 Humans 34 Triatoma infestans 32 controlled study 32 Insect Vectors 30 female 30 Triatoma 28 disease carrier 28 male 28 physiology 28 Female 26 Male 26 adult 22 disease transmission 22 insect vector 22 host parasite interaction 20 rural population 20 Rural Population 18 cross-sectional study 18 animal experiment 16