Guzmán MES, Barrera PMA, Rodríguez FME

Language: Spanish
References: 12
Page: 113-115
PDF size: 46.49 Kb.

ABSTRACT

Background: Triatomines, vector insects of Chagas’ disease are important in the transmission of this parasitism, which may be accomplished in several ways, contaminated vectors contact, even dead, is one of them. Objective: To determine viability time of Trypanosoma cruzi (T. cruzi) in dead Triatoma dimidiata (T. dimidiata). Material and methods: Forty fourth-stage nymphs of T. dimidiata contaminated with blood of T. cruzi-infected mice were studied. They were distributed into four groups of 10 nymphs maintained at 8, 20, 28 and 32°C. When insects of each experimental group died, the analysis of viability time began examining triatomines gastric content and inoculating mice in which parasitemia evolution was observed. Results: Dead triatomas maintained at 8, 20, 28 and 32°C showed metacyclic tripomastigotes permanence in a mean of 20, 16, 12 and 5 days, respectively. Parasites recovered by this way showed to be infectious in 40, 60, 80 and 60%, respectively. Conclusions: Insects vector of T. cruzi are able to transmit the parasite, even after dying.

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