Biological Parameters of Two Triatoma rubida Subspecies (Hemiptera: Reduviidae) and Their Laboratory Hybrids

Author:

Martínez-Ibarra José Alejandro12,Nogueda-Torres Benjamín3,Montañez-Valdez Oziel Dante12,Michel-Parra J Guadalupe2,Valenzuela-Campos Ricardo1

Affiliation:

1. Laboratorio de Entomología Médica, Departamento de Ciencias de la Naturaleza, Centro Universitario del Sur, Universidad de Guadalajara, Ciudad Guzmán, Jalisco, México

2. Cuerpo Académico de Cuencas, Humedales y Sustentabilidad, Departamento de Ciencias de la Naturaleza, Centro Universitario del Sur, Universidad de Guadalajara, Ciudad Guzmán, Jalisco, México

3. Becario de COFAA, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala S/N, Ciudad de México, México

Abstract

Abstract Chagas disease is one of the most important vector-borne diseases in Latin America, including Mexico. Recently, autochthonous cases have also been detected in the United States of America. It is suspected that two subspecies of Triatoma rubida (Uhler), T. r. sonoriana (Usinger) and T. r. uhleri (Usinger), considered efficient vectors of Trypanosoma cruzi Chagas in Mexico, could interbreed and potentially generate offspring with superior biological characteristics. In this study, the biological parameters of T. r. sonoriana, T. r. uhleri and their laboratory hybrids were evaluated. Hybrids of the two subspecies surpassed both parental subspecies, T. r. sonoriana and T. r. uhleri, in three (numbers of required blood meals to molt [16–20], feeding [10.5–17 min] and defecation times [˂1 min post-feeding]) of nine studied biological parameters. Moreover, the hybrids surpassed T. r. uhleri in two additional parameters, development time (298 d) and mortality (39–42%). Both the hybrid and the two parental cohorts had comparable results in the remaining four (onset of feeding, number of obtained females, number of eggs laid, and eclosion rate) of nine studied parameters. Thus, we conclude that hybrid vigor could result in an increased risk of T. cruzi transmission to humans and animals.

Publisher

Oxford University Press (OUP)

Subject

Infectious Diseases,Insect Science,General Veterinary,Parasitology

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