title: Transmission Capacity of Trypanosoma cruzi (Trypanosomatida: Trypanosomatidae) by Three Subspecies of Meccus phyllosomus (Heteroptera: Reduviidae) and Their Hybrids.
abstract: Three behaviors of epidemiological importance: the time lapse for the onset of feeding, actual feeding, and defecation time for Meccus phyllosomus pallidipennis (Stål), Meccus phyllosomus longipennis (Usinger), Meccus phyllosomus picturatus (Usinger), and their laboratory hybrids were evaluated in this study. The mean time lapse for the beginning of feeding was between 0.5 and 8.3 min considering all instars in each cohort, with highly significant differences only among fifth-instar nymphs, females, and males of M. p. pallidipennis and M. p. longipennis relative to the hybrid cohorts. Four hybrid (LoPa [M. p. longipennis and M. p. pallidipennis] and LoPi [M. p. longipennis and M. p. picturatus] and their reciprocal experimental crosses) cohorts had similar mean feeding times to one of the parental subspecies, but longer than the other one. The remaining hybrid cohort (PaPi [M. p. pallidipennis and M. p. picturatus]) had longer feeding times than both of its parental subspecies. The specimens of the LoPa and LoPi hybrid cohorts defecated faster than the respective instars of the three parental cohorts. With exception of first- and fifth-instar nymphs, PaPi cohorts defecated faster than the remaining seven cohorts. More than 60% of defecation events occurred during feeding in the six hybrid cohorts. Our results indicate that hybrid cohorts have more potential to acquire infection and transmit Trypanosoma cruzi Chagas than their parental cohorts.
authors.affiliation: Laboratorio de Entomología Médica, Departamento de Salud y Bienestar, Centro Universitario del Sur, Universidad de Guadalajara, Av. Enrique Arreola Silva 883, 49000 Ciudad Guzmán, Jalisco, México (aibarra@cusur.udg.mx), aibarra@cusur.udg.mx.
authors.forename: J A
authors.initials: JA
authors.lastname: Martínez-Ibarra
authors.affiliation: Becario de COFAA, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, México, D. F (bnogueda@yahoo.com).
authors.forename: B
authors.initials: B
authors.lastname: Nogueda-Torres
authors.affiliation: Laboratorio de Biología de Parásitos, Facultad de Medicina, Universidad Nacional Autónoma de México, México, D. F (pazmar@unam.mx; imayc@prodigy.net.mx; movences@gmail.com).
authors.forename: P M
authors.initials: PM
authors.lastname: Salazar-Schettino
authors.affiliation: Laboratorio de Biología de Parásitos, Facultad de Medicina, Universidad Nacional Autónoma de México, México, D. F (pazmar@unam.mx; imayc@prodigy.net.mx; movences@gmail.com).
authors.forename: M
authors.initials: M
authors.lastname: Cabrera-Bravo
authors.affiliation: Laboratorio de Biología de Parásitos, Facultad de Medicina, Universidad Nacional Autónoma de México, México, D. F (pazmar@unam.mx; imayc@prodigy.net.mx; movences@gmail.com).
authors.forename: M O
authors.initials: MO
authors.lastname: Vences-Blanco
authors.affiliation: División de Bienestar y Desarrollo Regional, Centro Universitario del Sur, Universidad de Guadalajara, Av. Enrique Arreola Silva 883, 49000 Ciudad Guzmán, Jalisco, México (gonzalor@cusur.udg.mx).
authors.forename: G
authors.initials: G
authors.lastname: Rocha-Chávez
mesh_terms: D000818:Animals; D014355:Chagas Disease / Q000469:parasitology / Q000635:transmission*; D003672:Defecation; D005247:Feeding Behavior; D005260:Female; D006824:Hybridization, Genetic; D007303:Insect Vectors / Q000235:genetics / Q000254:growth & development / Q000469:parasitology / Q000502:physiology; D008297:Male; D009758:Nymph / Q000235:genetics / Q000254:growth & development / Q000469:parasitology / Q000502:physiology; D020064:Reduviidae / Q000235:genetics / Q000254:growth & development / Q000469:parasitology* / Q000502:physiology*; D014349:Trypanosoma cruzi / Q000502:physiology*
keywords: Meccus subspecies; Mexico; Triatominae; Trypanosoma cruzi transmission; behavior