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Lima-Oliveira TM, Fontes FVHM, Lilioso M, Pires-Silva D, Teixeira MMG, Meza JGV, Harry M, Fileé J, Costa J, Valença-Barbosa C, Folly-Ramos E, Almeida CE. Molecular eco-epidemiology on the sympatric Chagas disease vectors Triatoma brasiliensis and Triatoma petrocchiae: Ecotopes, genetic variation, natural infection prevalence by trypanosomatids and parasite genotyping. Acta Trop 2020; 201:105188. [PMID: 31545949 DOI: 10.1016/j.actatropica.2019.105188] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Revised: 09/18/2019] [Accepted: 09/19/2019] [Indexed: 11/15/2022]
Abstract
Triatoma petrocchiae is the newly member of the Triatoma brasiliensis species complex. This species overlaps with T. brasiliensis in geographic and ecotypic occupation in the sylvatic habitat because both inhabit rocky outcrops in the semi-arid portion of Brazilian northeast. In this region T. brasiliensis is the most important Chagas disease vector because it constantly colonizes domiciles. In contrast, T. petrocchiae is rarely found in peri or intradomiciliary habitats - reason why little is known about this species. Therefore, Here, we present information for the first time on. the T. petrocchiae ecotopes, genetic diversity, Trypanosoma cruzi prevalence/genotyping in comparison to T. brasiliensis. We found T. brasilensis (N = 223) and T. petrocchiae (N = 69) in co-habitation in rocky outcrops in three Districts of Paraíba and Rio Grande do Norte states. Forty-tree T. petrocchiae insects of eleven sampling spots (composing three geographic populations) were genotyped for the mitochondrial Cyt B gene and little geographic structure was observed. Tajima's D test suggested that species is evolving toward a mutation-drift equilibrium in our collection range. Sylvatic T. petrocchiae had 4% (3/68) of infected insects by T. cruzi, whereas T. brasiliensis had 26% (59/223). Fluorescent Fragment Length Barcoding demonstrated that all three T. petrocchiae harbored TcI whereas T. brasiliensis had TcI, but also TcIII, TcII/TcVI and T. rangeli genotype A, sometimes under mixed infections. None of infected T. petrocchiae were carrying mixed infections. However, this result should be confirmed using a larger pool of infected bugs. We here presented the first documentation of T. rangeli infecting T. brasiliensis. The finding of infected T. petrocchiae calls for constant vector monitoring because the epidemiologic scenario is dynamic and sylvatic vectors are progressively found in adaptation to anthropic environments.
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Affiliation(s)
- Tarcianne M Lima-Oliveira
- Programa de Pós-Graduação em Ecologia e Monitoramento Ambiental, Universidade Federal da Paraíba-UFPB, Campus IV, Rio Tinto, Paraíba, 58297, Brazil; Departamento de Biologia Animal, Instituto de Biologia, Universidade Estadual de Campinas - UNICAMP, Campinas, São Paulo, 13083-862, Brazil
| | - Fernanda von Hertwig M Fontes
- Departamento de Biologia Animal, Instituto de Biologia, Universidade Estadual de Campinas - UNICAMP, Campinas, São Paulo, 13083-862, Brazil
| | - Maurício Lilioso
- Departamento de Biologia Animal, Instituto de Biologia, Universidade Estadual de Campinas - UNICAMP, Campinas, São Paulo, 13083-862, Brazil
| | - Dayane Pires-Silva
- Departamento de Biologia Animal, Instituto de Biologia, Universidade Estadual de Campinas - UNICAMP, Campinas, São Paulo, 13083-862, Brazil
| | - Marta Maria Geraldes Teixeira
- Laboratório de Taxonomia e Filogenia de Tripanossomatídeos, Instituto de Ciências Biomédicas, Universidade de São Paulo-USP, São Paulo, São Paulo, 05508-000, Brazil
| | - Jose Gabriel Vergara Meza
- Laboratório de Taxonomia e Filogenia de Tripanossomatídeos, Instituto de Ciências Biomédicas, Universidade de São Paulo-USP, São Paulo, São Paulo, 05508-000, Brazil
| | - Myriam Harry
- CNRS-IRD-Univ. Paris-Sud, IDEEV, Université Paris-Saclay, Gif-sur-Yvette Cedex 91190, France
| | - Jonathan Fileé
- CNRS-IRD-Univ. Paris-Sud, IDEEV, Université Paris-Saclay, Gif-sur-Yvette Cedex 91190, France
| | - Jane Costa
- Laboratório de Biodiversidade Entomológica, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz - Fiocruz, Rio de Janeiro, Rio de Janeiro, 21040-900, Brazil
| | - Carolina Valença-Barbosa
- Departamento de Biologia Animal, Instituto de Biologia, Universidade Estadual de Campinas - UNICAMP, Campinas, São Paulo, 13083-862, Brazil
| | - Elaine Folly-Ramos
- Programa de Pós-Graduação em Ecologia e Monitoramento Ambiental, Universidade Federal da Paraíba-UFPB, Campus IV, Rio Tinto, Paraíba, 58297, Brazil
| | - Carlos Eduardo Almeida
- Departamento de Biologia Animal, Instituto de Biologia, Universidade Estadual de Campinas - UNICAMP, Campinas, São Paulo, 13083-862, Brazil.
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