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Triatoma costalimai Naturally Infected by Trypanosoma cruzi: A Public Health Concern

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  • 1 Interdisciplinary Laboratory of Entomological Surveillance in Diptera and Hemiptera, Instituto Oswaldo Cruz (IOC), Fundação Oswaldo Cruz (FIOCRUZ), Rio de Janeiro, Brazil;
  • | 2 Postgraduate Program in Animal Biology, Universidade Federal Rural do Rio de Janeiro (UFRRJ), Rio de Janeiro, Brazil;
  • | 3 Laboratory of Molecular Diagnosis and Hematology, Faculty of Pharmacy, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil;
  • | 4 Laboratory of Eco-Epidemiology, Faculty of Exact and Natural Sciences, Instituto de Ecología, Genética y Evolución de Buenos Aires-Consejo Nacional de Investigaciones Científicas y Técnicas (IEGEBA-CONICET), University of Buenos Aires, Buenos Aires, Argentina;
  • | 5 Secretary of Health of the State of Tocantins, Palmas, Brazil

The rupestrian Triatoma costalimai species has been found infected by Trypanosoma cruzi in wild, peridomicile, and intradomicile environments in the municipality of Aurora do Tocantins, Tocantins, Brazil. Proximity between rock outcrops increases the risk of vector transmission of Chagas disease via this species. This work describes a focus of colonization by T. costalimai specimens infected by T. cruzi in rock outcrops located in an urban area in this municipality. Parasitological examination of feces from the collected specimens, axenic cultivation of T. cruzi–positive samples, and genetic characterization of the isolates were performed. Nymph and adult specimens were collected with a high infection prevalence (64.5%) for T. cruzi discrete type unit (DTU I). Participation of the T. costalimai species in the wild cycle of T. cruzi in rock outcrops located in an urban area demonstrates the need for entomological surveillance and control of vector transmission of Chagas disease in the municipality of Aurora do Tocantins, Tocantins.

Author Notes

Address correspondence to Teresa Cristina Monte Gonçalves, Interdisciplinary Laboratory of Entomological Surveillance in Diptera and Hemiptera, Instituto Oswaldo Cruz (IOC), Fundação Oswaldo Cruz (FIOCRUZ), Av. Brasil, 4365 CEP: 21040-360, Rio de Janeiro, Brazil. E-mail: tcmonte@ioc.fiocruz.br

Financial support: IOC/FIOCRUZ; Secretary of Health of the State of Tocantins – SESAU-TO.

Authors’ addresses: Simone Caldas Teves, Catarina Macedo Lopes, Bruna Lucia Nascimento de Oliveira, Danielle Misael de Souza, Jacenir Reis dos Santos Mallet, and Teresa Cristina Monte Gonçalves, Instituto Oswaldo Cruz (IOC), Interdisciplinary Laboratory of Entomological Surveillance in Diptera and Hemiptera, Fundação Oswaldo Cruz (FIOCRUZ), Rio de Janeiro, Brazil, E-mails: scteves@ioc.fiocruz.br, aniratac@ioc.fiocruz.br, brunalucianascimento@gmail.com, danymisael@gmail.com, jacenir@ioc.fiocruz.br, and tcmonte@ioc.fiocruz.br. Helena Keiko Toma, Laboratory of Molecular Dignosis and Hematology, Faculty of Pharmacy, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil, E-mail: hktoma@globo.com. Ana Laura Carbajal de la Fuente, Laboratory of Eco-Epidemiology, Faculty of Exact and Natural Sciences, Instituto de Ecología, Genética y Evolución de Buenos Aires - Consejo Nacional de Investigaciones Científicas y Técnicas (IEGEBA - CONICET), University of Buenos Aires, Buenos Aires, Argentina, E-mail: analaura.carbajal@gmail.com. Iza Alencar Sampaio de Oliveira, Assessoria de Zoonoses e Animais Peçonhentos, Secretaria de Saúde do Estado do Tocantins, Tocantins, Brazil, E-mail: iza.aso@gmail.com.

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