[Susceptibility of Triatoma infestans to various strains of Trypanosoma cruzi isolated from chagasic patients from the Triângulo Mineiro]. / Susceptibilidade do Triatoma infestans a diferentes cepas de Trypanosoma cruzi isoladas de pacientes chagásicos do Triângulo Mineiro.

This data evaluated the susceptibility of T. infestans to seven different strains of T. cruzi from chagasic patients of the Triângulo Mineiro, isolated and adapted in Swiss mice. A total of 200 bugs were fed in mice in acute phase injected with the different strains of T. cruzi and at each 30 days, during 5 months, their feces were obtained by abdominal compression or spontaneous dejection. The overall positivity of T. infestans infection with these different strains of T. cruzi was 62.08%. There was a high mortality rate (60%) during the examination period. We conclude that T. infestans has a low susceptibility to these strains. This could explain the low rate of positivity in the xenodiagnosis in chagasic chronic patients of the Triângulo Minerio.