Current situation of Chagas disease vectors (Hemiptera, Reduviidae) in Southern Rio Grande do Sul State, Brazil

ABSTRACT Chagas disease (CD) has been considered endemic in the South of Rio Grande do Sul (RS) State, Brazil. This study aimed at evaluating the occurrence of Trypanosoma cruzi vectors based on the main species captured in Southern Rio Grande do Sul State from 2008 to 2019. The study area comprised...

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Bibliographic Details
Published in:Revista do Instituto de Medicina Tropical de São Paulo
Main Authors: Tanise Freitas Bianchi, Sabrina Jeske, Ana Paula da Paz Grala, Italo Ferreira de Leon, Cleonara Bedin, Fernanda de Mello, Guilherme Carlos Castilhos da Silva, Marcos Marreiro Villela
Format: Article in Journal/Newspaper
Language:English
Published: Universidade de São Paulo (USP) 2021
Subjects:
Trypanosoma cruzi
Triatoma rubrovaria
Panstrongylus tupynambai
Vector control
Rio Grande do Sul
Chagas disease
Arctic medicine. Tropical medicine
RC955-962
Infectious and parasitic diseases
RC109-216
Arctic
Bage
Online Access:https://doi.org/10.1590/s1678-9946202163047
https://doaj.org/article/473490df0209479b8bb7df0ae3679d2f
Description
Summary:ABSTRACT Chagas disease (CD) has been considered endemic in the South of Rio Grande do Sul (RS) State, Brazil. This study aimed at evaluating the occurrence of Trypanosoma cruzi vectors based on the main species captured in Southern Rio Grande do Sul State from 2008 to 2019. The study area comprised counties that belong to the 3rd Regional Health Coordination (RHC) and to the 7th RHC, whose headquarters are in Pelotas and Bage, respectively. The study was based on secondary data provided by the partnership between the Federal University of Pelotas, Rio Grande do Sul State (UFPel-RS) and the State Health Surveillance Center in RS (SCHS-RS). One thousand and four hundred triatomines were captured in the area supervised by the 3rd RHC, mainly in Cangucu (37.7%), Piratini (22.4%) and Pinheiro Machado (15.1%), while, in the area supervised by the 7th RHC, the largest number of triatomines was captured in Lavras do Sul (64.15%). In both areas, Triatoma rubrovaria (90.6%) and Panstrongylus tupynambai (7.4%) were the most common species. Most were captured inside households but T. cruzi-positive insects were not found in the period under study. The results of this study show that, in Southern Rio Grande do Sul State, there is still a high rate of triatomine household invasion and dispersal, mainly by T. rubrovaria. Thus, the entomological surveillance should be maintained with the participation of the population and further studies should be deepened in the area.

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