Survey of trypanosoma (Kinetoplastida: Trypanosomatidae) infection in monte negro municipality, state of rondônia, western amazon, with first record of t. evansi in the state

Introduction: Trypanosomes can infect humans and animals. This is the first record of the occurrence of Trypanosoma evansi in Rondônia. Methods: Blood samples were collected from 7 dogs and 22 humans. Furthermore, triatomines and tabanids were collected. Results: It was observed that 42.8% of the dogs tested positive for T. evansi and 14.3% presented mixed infection; 15% of the triatomines tested positive for flagellates identified as T. cruzi TCI (3 specimens), T. cruzi TCI, and T. rangeli (1 specimen), and one with T. cruzi TCV. Two tabanids were infected with T. theileri. Conclusions: These findings may benefit vector control strategies. © 2019, Sociedade Brasileira de Medicina Tropical. All rights reserved

Biological aspects of Rhodnius montenegrensis (Hemiptera, Reduviidae, Triatominae) under laboratory conditions

Triatominae are insects notorious as vectors of Trypanosoma cruzi, which is the etiologic agent of Chagas disease, and other trypanosomatids. Triatomines of the genus Rhodnius are primarily sylvatic, nevertheless the occurrence of native species that invade households suggests their possible role in the transmission of Chagas disease. Rhodnius montenegrensis was first described in 2012, but the biological aspects of this species are still unknown. This study aimed to analyze the biological aspects of R. montenegrensis under laboratory conditions. The emergence rate was 63.0%, the mean time required for the emergence was 13.9 +/- 1.7 days, the biological cycle from egg to adult phase occurred in 105.2 +/- 9.2 days, the number of bloodmeals required for each nymphal stage to reach the next stage varies between a minimum of two and a maximum of seven. The weight gained after a bloodmeal varied between 10.6 times on 1st-instar nymphs and 3.9 times on 5th-instar nymphs. The adult specimens had the lowest gain of weight, reaching 2.2 times on females and 1.6 times on males. The sex ratio observed was 1:1. These data are relevant to understand the life cycle of this new described species and to elaborate more effective vector control strategies1912929932sem informaçãosem informaçã