title: Importance of Hybrids of Meccus phyllosomus mazzottii, and M. p. pallidipennis, and M. p. phyllosomus to the Transmission of Trypanosoma cruzi in Mexico.
abstract: The time interval before beginning feeding, feeding time, and defecation delay for 3 Triatominae subspecies, Meccus phyllosomus mazzottii (Ma), M. p. pallidipennis (Pa), and M. p. phyllosomus (Phy) and their laboratory hybrids were evaluated. The mean time interval for beginning feeding was between 0.1 and 10.1 min for all nymphal instars in each cohort, with significant (P < 0.05) differences among hybrids and parental cohorts. Four (both MaPa and MaPhy) hybrid cohorts had similar mean feeding times to that recorded for one of their parental subspecies, but shorter than the other, whereas the remaining hybrid cohorts (both PaPhy) had longer feeding times than did both of their parental subspecies. The specimens of MaPa defecated later than the respective instars on their parental subspecies, whereas most instars of the remaining 4 hybrid cohorts (MaPhy and PaPhy) defecated earlier than the respective instars of M. p. phyllosomus. Between 40% and 50% of the defecation events occurred when feeding in MaPhy and PaPhy hybrid cohorts. Given these results, the hybrid cohorts were more effective vectors of Trypanosoma cruzi than their parental subspecies, which could indicate a potentially higher risk of transmission of T. cruzi to reservoir hosts.
authors.affiliation: Área de Entomología Médica, Centro Universitario del Sur, Universidad de Guadalajara.
authors.forename: José Alejandro
authors.initials: JA
authors.lastname: Martínez-Ibarra
authors.forename: Benjamín
authors.initials: B
authors.lastname: Nogueda-Torres
authors.forename: Juan Carlos
authors.initials: JC
authors.lastname: García-Lino
authors.forename: Demver
authors.initials: D
authors.lastname: Arroyo-Reyes
authors.forename: Luis Fernando
authors.initials: LF
authors.lastname: Salazar-Montaño
authors.forename: Juan Ángel
authors.initials: JÁ
authors.lastname: Hernández-Navarro
authors.forename: Claudia Gabriela
authors.initials: CG
authors.lastname: Díaz-Sánchez
authors.forename: Elsi Sarai Del
authors.initials: ES
authors.lastname: Toro-Arreola
authors.forename: Gonzalo
authors.initials: G
authors.lastname: Rocha-Chávez
mesh_terms: D000818:Animals; D014355:Chagas Disease / Q000453:epidemiology* / Q000469:parasitology / Q000635:transmission*; D002678:Chimera; D003433:Crosses, Genetic; D003672:Defecation / Q000502:physiology; D005247:Feeding Behavior / Q000502:physiology; D005260:Female; D006801:Humans; D007303:Insect Vectors / Q000235:genetics / Q000469:parasitology*; D008297:Male; D008800:Mexico / Q000453:epidemiology; D011817:Rabbits; D014225:Triatominae / Q000235:genetics / Q000469:parasitology*; D014349:Trypanosoma cruzi / Q000472:pathogenicity / Q000502:physiology*