[Panstrongylus megistus in artificial ecotopes on islands of the Paraná River].

In response to complaints of triatomines on islands of the Alto Paraná River, an investigation to determine the presence of triatomines was conducted in 145 artificial ecotopes and 4 (2.8%) were infested, comprising a residence, a sports and leisure club, a former school and a woodpile. Of the 35 P. megistus collected, 17 were analyzed and 12 (70.6%) were found to be infected with Trypanosoma cruzi. Birds and rodents were the most common food sources. All serologic examinations (56 human, 18 dogs and 10 cats) were negative.