Vaccination with Trypanosoma rangeli reduces the infectiousness of dogs experimentally infected with Trypanosoma cruzi

摘要

The goal of this work was to test the efficacy of the vaccination with in dogs. Mongrel dogs received three subcutaneous injections of fixed epimastigotes at 6-week intervals. Such immunisation induced antibodies against . While both control and immunised dogs developed detectable parasitemia, this was lower and shorter in vaccinated animals. Interestingly, feeding of nymphs on vaccinated and chronically infected dogs led to a sharp reduction in the rate of bug infection. These results suggest that it might be possible to reduce the vectorial parasitemia through vaccination of dogs. As dogs are known to play a major role in the domestic cycle of , this might represent a strategy to reduce parasite transmission to humans.