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Natural infection by Trypanosoma cruzi in triatomines and seropositivity for Chagas disease of dogs in rural areas of Rio Grande do Norte, Brazil
Freitas, Yannara Barbosa Nogueira; Souza, Celeste da Silva Freitas de; Magalhães, Jamille Maia e; Sousa, Maressa Laíse Reginaldo de; d'Escoffier, Luiz Ney; Valle, Tânia Zaverucha do; Gonçalves, Teresa Cristina Monte; Gil-Santana, Hélcio Reinaldo; Kazimoto, Thais Aaparecida; Amora, Sthenia Santos Albano.
  • Freitas, Yannara Barbosa Nogueira; Universidade Federal Rural do Semi-Árido. Centro de Ciências Agrárias. Mossoró. BR
  • Souza, Celeste da Silva Freitas de; Universidade Federal Rural do Semi-Árido. Centro de Ciências Agrárias. Mossoró. BR
  • Magalhães, Jamille Maia e; Universidade Federal Rural do Semi-Árido. Centro de Ciências Agrárias. Mossoró. BR
  • Sousa, Maressa Laíse Reginaldo de; Universidade Federal Rural do Semi-Árido. Centro de Ciências Agrárias. Mossoró. BR
  • d'Escoffier, Luiz Ney; Universidade Federal Rural do Semi-Árido. Centro de Ciências Agrárias. Mossoró. BR
  • Valle, Tânia Zaverucha do; Universidade Federal Rural do Semi-Árido. Centro de Ciências Agrárias. Mossoró. BR
  • Gonçalves, Teresa Cristina Monte; Universidade Federal Rural do Semi-Árido. Centro de Ciências Agrárias. Mossoró. BR
  • Gil-Santana, Hélcio Reinaldo; Universidade Federal Rural do Semi-Árido. Centro de Ciências Agrárias. Mossoró. BR
  • Kazimoto, Thais Aaparecida; Universidade Federal Rural do Semi-Árido. Centro de Ciências Agrárias. Mossoró. BR
  • Amora, Sthenia Santos Albano; Universidade Federal Rural do Semi-Árido. Centro de Ciências Agrárias. Mossoró. BR
Rev. Soc. Bras. Med. Trop ; 51(2): 190-197, Mar.-Apr. 2018. tab, graf
Article in English | LILACS | ID: biblio-897070
ABSTRACT
Abstract

INTRODUCTION:

Chagas disease is caused by the protozoa Trypanosoma cruzi. Its main reservoir is the domestic dog, especially in rural areas with favorable characteristics for vector establishment and proliferation. The aims of this study were to collect data, survey and map the fauna, and identify T. cruzi infection in triatomines, as well as to assess the presence of anti-T. cruzi antibodies in dogs in rural areas of the municipality of Mossoró, Brazil.

METHODS:

An active entomologic research was conducted to identify adult specimens through an external morphology dichotomous key. The analysis of natural infection by T. cruzi in the insects was performed by isolation in culture and polymerase chain reaction. The antibody testing for T. cruzi in dogs was performed by enzyme-linked immunosorbent assay and indirect immunofluorescence assay.

RESULTS:

A total of 68 triatomines were captured, predominantly the Triatoma brasiliensis brasiliensis (Neiva 1911) species. The vector mapping displayed areas with greater risk for parasite transmission. Of the examined triatomines (51 specimens), 41.2% (21/51) were positive on polymerase chain reaction, and all were negative on culture. In the serum testing, 11% (25/218) of dogs were seropositive, but no association was found between the serologic results and the presence and infection by T. cruzi in triatomines.

CONCLUSIONS:

This study demonstrated the movement of T. cruzi in the studied area, by the presence of vectors and naturally infected domestic reservoirs. The mapping of the studied rural area demonstrates the risk of disease transmission.
Subject(s)


Full text: Available Index: LILACS (Americas) Main subject: Trypanosoma cruzi / Antibodies, Protozoan / Triatominae / Chagas Disease / Dog Diseases / Insect Vectors Type of study: Diagnostic study / Prevalence study / Prognostic study / Risk factors Limits: Animals Country/Region as subject: South America / Brazil Language: English Journal: Rev. Soc. Bras. Med. Trop Journal subject: Tropical Medicine Year: 2018 Type: Article Affiliation country: Brazil Institution/Affiliation country: Universidade Federal Rural do Semi-Árido/BR

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Full text: Available Index: LILACS (Americas) Main subject: Trypanosoma cruzi / Antibodies, Protozoan / Triatominae / Chagas Disease / Dog Diseases / Insect Vectors Type of study: Diagnostic study / Prevalence study / Prognostic study / Risk factors Limits: Animals Country/Region as subject: South America / Brazil Language: English Journal: Rev. Soc. Bras. Med. Trop Journal subject: Tropical Medicine Year: 2018 Type: Article Affiliation country: Brazil Institution/Affiliation country: Universidade Federal Rural do Semi-Árido/BR