Please use this identifier to cite or link to this item: https://www.arca.fiocruz.br/handle/icict/23901
Title: Life cycle of Triatoma ryckmani (Hemiptera: Reduviidae) in the laboratory, feeding patterns in nature and experimental infection with Trypanosoma cruzi
Authors: Zeledón, Rodrigo
Cordero, Marlen
Marroquim, Ricardo
Lorosa, Elias Seixas
Affilliation: Universidad Nacional. Escuela de Medicina Veterinaria. Laboratorio de Zoonosis. Heredia, Costa Rica.
Universidad Nacional. Escuela de Medicina Veterinaria. Laboratorio de Zoonosis. Heredia, Costa Rica.
Universidad de San Carlos de Guatemala. Facultad de Ciencias Químicas y Farmacia. Escuela de Biología. Laboratorio de Entomología Aplicada y Parasitología. Ciudad de Guatemala, Guatemala.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório Nacional e Internacional de Referência em Taxonomia de Triatomíneos. Rio de Janeiro, RJ. Brasil.
Abstract: A cohort initiated with 121 eggs, yielding 105 first instar nymphs (eclosion rate: 86.78%), allowed us to observe the entire life cycle of Triatoma ryckmani under laboratory conditions (24ºC and 62% relative humidity), by feeding them on anesthetized hamsters. It was possible to obtain 62 adults and the cycle from egg to adult took a mean of 359.69 days with a range of 176-529 days (mortality rate of nymphs: 40.95%). Mean life span of adults was of 81 days for females and 148 days for males. The developmental periods of 4th and 5th nymphs were longer than those of the other instars. This suggests that young siblings have a better chance of taking a hemolymph meal from older ones, in order to survive during fasting periods during prolonged absences of vertebrate hosts from natural ecotopes. The stomach contents of 37 insects showed blood from rodents (15 cases), lizards (7 cases), birds (6 cases) and insect hemolymph (7 cases). Out of 10 insects fed by xenodiagnosis on a Trypanosoma cruzi infected mouse, all but one became infected with the parasite.
Keywords: Triatoma ryckmani
life cycle
food preference
Trypanosoma cruzi
keywords: Triatoma ryckmani
Ciclo da vida
Trypanosoma cruzi
preferência alimentar
Issue Date: 2011
Publisher: Fundação Oswaldo Cruz. Instituto Oswaldo Cruz
Citation: ZELEDÓN, Rodrigo; et al. Life cycle of Triatoma ryckmani (Hemiptera: Reduviidae) in the laboratory, feeding patterns in nature and experimental infection with Trypanosoma cruzi. Mem Inst Oswaldo Cruz, v.105, n.1, p.99-102, Feb. 2010.
ISSN: 0074-0276
Copyright: open access
Appears in Collections:IOC - Artigos de Periódicos

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