Metacyclogenesis of Trypanosoma cruzi in B. ferroae (Reduviidae: Triatominae) and feces infectivity under laboratory conditions

Maritza Alarcón , Cesare Colasante, Sonia Araujo , Reinaldo Gutiérrez -Marín, Dalmiro Cazorla-Perfetti , Claudia Magaly Sandoval-Ramírez, .

Keywords: Trypanosoma cruzi, Triatominae, Chagas disease, trypanosomiasis

Abstract

Introduction: Belminus ferroae is a triatominae with entomophagous behavior. However, it may occasionally feed on vertebrates. Currently, there is no evidence of natural infection with Trypanosoma cruzi or the occurrence of metacyclogenesis in this species.
Objective: To test T. cruzi metacyclogenesis in B. ferroae and the infectivity of their feces or intestinal contents in rodents under laboratory conditions.
Materials and methods: Twenty nymphs of B. ferroae were infected with an autochthonous strain of T. cruzi (M/HOM/VE/09/P6). Fecal and urine samples were collected from spontaneous droppings or by compressing the bugs’ abdomens and, eventually, by removing their gut contents, and then examined at 10, 20, 30, 40, 50, and 60 days. We quantified T. cruzi parasitic load, as well as the evolutionary forms in feces, urine, and intestinal contents by Giemsa staining. Similarly, we evaluated the infectivity of T. cruzi metacyclic trypomastigotes in albino mice.
Results: The parasitological analysis showed three insects (15%) infected with T. cruzi at 30 (n=1), 40 (n=1), and 50 (n=1) days post-infection. We observed parasitic loads of up to 1.62 x 105 trypanosomes/mm3 and metacyclogenesis percentages between 3.5% and 6.78%.
Conclusions: This is the first time that T. cruzi metacyclogenesis is reported in a species of the genus Belminus under laboratory conditions and the infectivity of Belminus’ feces is demonstrated on a vertebrate host.

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  • Maritza Alarcón Laboratorio de Parasitología Experimental, Departamento de Biología, Facultad de Ciencias, Universidad de Los Andes, Mérida, Venezuela https://orcid.org/0000-0001-9035-0933
  • Cesare Colasante Laboratorio de Fisiología de la Conducta, Facultad de Medicina, Universidad de Los Andes, Mérida, Venezuela https://orcid.org/0000-0002-2066-8679
  • Sonia Araujo Laboratorio de Parasitología Experimental, Departamento de Biología, Facultad de Ciencias, Universidad de Los Andes, Mérida, Venezuela https://orcid.org/0000-0001-9133-1267
  • Reinaldo Gutiérrez -Marín Grupo de Investigación GIEPATI, Universidad de Pamplona, Pamplona, Colombia https://orcid.org/0000-0002-9396-1884
  • Dalmiro Cazorla-Perfetti Laboratorio de Entomología, Parasitología y Medicina Tropical, Centro de Investigaciones Biomédicas, Decanato de Investigaciones, Universidad Nacional Experimental “Francisco de Miranda”, Coro, Venezuela https://orcid.org/0000-0001-7199-6325
  • Claudia Magaly Sandoval-Ramírez Grupo de Investigaciones en Ciencias Básicas y Aplicadas para la Sostenibilidad, Facultad de Ciencias Exactas, Naturales y Agropecuarias, Universidad de Santander, Bucaramanga, Colombia https://orcid.org/0000-0001-8981-047X

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How to Cite
1.
Alarcón M, Colasante C, Araujo S, Gutiérrez -Marín R, Cazorla-Perfetti D, Sandoval-Ramírez CM. Metacyclogenesis of Trypanosoma cruzi in B. ferroae (Reduviidae: Triatominae) and feces infectivity under laboratory conditions. biomedica [Internet]. 2021 Mar. 19 [cited 2024 May 14];41(1):179-86. Available from: https://revistabiomedica.org/index.php/biomedica/article/view/5394

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Published
2021-03-19
Section
Short communication

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