Distribution and ecoepidemiology of the triatomine fauna (Hemiptera: Reduviidae) in Margarita Island, Bolívar, Colombia

Omar Cantillo-Barraza, Andrés Gómez-Palacio, Diego Salazar, Ana María Mejía-Jaramillo, Jaime Calle, Omar Triana, .

Keywords: Chagas’ disease, Triatominae, Trypanosoma cruzi, Triatoma spp., Rhodnius spp., Colombia

Abstract

Introduction. Information concerning to triatomine diversity and some eco-epidemiologic aspects on Margarita Island has been recorded only from two of the five counties on the island. Knowledge about species habitat and their natural infection is essential to establish the risk for Chagas disease in endemic areas.
Objective. The distribution of triatomine insect fauna and its infection with Trypanosoma cruzi was described in order to establish and to stratify the risk of Chagas disease transmission.
Material and methods. Each of the 5 counties on Margarita Island were surveyed for triatomid insects inside and outside each dwelling. In the extradomicilary area, searches were conducted in the palms and bird nests located within forests and in pastures near domiciles. Infection with T. cruzi was determined amplifying by PCR the DNA extracted from triatomine feces.
Results. Five species of Reduviidae were recovered among the 1,154 triatomines captured in the 5 counties. Triatoma maculata and Rhodnius pallescens showed high infection rates within dwellings and as well as in the peridomestic areas in Mompós and Talaigua Nuevo. On the palm trees, only R. pallescens and Eratyrus cuspidatus were found infected, and only in San Fernando and Margarita. In Cicuco, only R. pallescens was infected. Presence of Triatoma dimidiata was also ascertained.Conclusion. Infected triatomines were present in houses and on palm trees in all counties on the island. These observations indicate a potential risk of Chagas across the entire island; furthermore the presence of T. dimidiata, a very efficient Chagas vector, emphasizes the need to establish its epidemiological status on the island.

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  • Omar Cantillo-Barraza Grupo de Biología y Control de Enfermedades Infecciosas, BCEI, Sede de Investigación Universitaria (SIU), Instituto de Biología, Universidad de Antioquia, Medellín, Colombia
  • Andrés Gómez-Palacio Grupo de Biología y Control de Enfermedades Infecciosas, BCEI, Sede de Investigación Universitaria (SIU), Instituto de Biología, Universidad de Antioquia, Medellín, Colombia
  • Diego Salazar Grupo de Ecoepidemiología y Control Biológico, Instituto de Biología, Universidad de Antioquia, Medellín, Colombia
  • Ana María Mejía-Jaramillo Grupo de Biología y Control de Enfermedades Infecciosas, BCEI, Sede de Investigación Universitaria (SIU), Instituto de Biología, Universidad de Antioquia, Medellín, Colombia
  • Jaime Calle Grupo de Ecoepidemiología y Control Biológico, Instituto de Biología, Universidad de Antioquia, Medellín, Colombia
  • Omar Triana Grupo de Biología y Control de Enfermedades Infecciosas, BCEI, Sede de Investigación Universitaria (SIU), Instituto de Biología, Universidad de Antioquia, Medellín, Colombia

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How to Cite
1.
Cantillo-Barraza O, Gómez-Palacio A, Salazar D, Mejía-Jaramillo AM, Calle J, Triana O. Distribution and ecoepidemiology of the triatomine fauna (Hemiptera: Reduviidae) in Margarita Island, Bolívar, Colombia. biomedica [Internet]. 2010 Sep. 30 [cited 2024 May 12];30(3):382-9. Available from: https://revistabiomedica.org/index.php/biomedica/article/view/272

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Published
2010-09-30
Section
Original articles

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