Adult Argentina article human Humans 86 adult 75 Female 74 Male 71 female 64 Middle Aged 62 male 59 Adolescent 51 priority journal 49 controlled study 45 major clinical study 44 Child 38 Aged 35 aged 35 adolescent 34 child 32 Child, Preschool 30 Infant 24 Young Adult 24 middle aged 20 polymerase chain reaction 19 Animals 18 Trypanosoma cruzi 18 Polymerase Chain Reaction 17 infant 17 prevalence 17