Animals South America article 124 animal 115 Argentina 106 nonhuman 87 physiology 51 Female 49 classification 49 genetics 45 female 44 Phylogeny 42 controlled study 42 Male 41 phylogeny 36 male 32 animal experiment 28 Humans 23 Seasons 23 human 23 larva 23 priority journal 23 Chagas disease 22 Ecosystem 21 Larva 21 Animalia 20 genetic variability 20 Article 18 DNA sequence 18 parasitology 18