Introduction: This study reports for the fi rst time the infection of Rhodnius montenegrensis by Trypanosoma rangeli. Methods: The triatomines were manually collected in Attalea speciosa in the municipality of Buritis, Rond么nia. The identifi cation of the trypanosomatid species was confi rmed by multiplex PCR. Results: All of the collected triatomines were R. montenegrensis. The analysis confi rmed that all of the adults were infected with the epimastigote form of T. rangeli. Conclusions: This report of a new vector of T. rangeli raises a warning for the State of Rond么nia because the simultaneous presence of T. rangeli with T. cruzi in the same geographic region enables the occurrence of mixed infections in hosts and vectors, which complicates the differential diagnosis.
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