Life cycle of Triatoma ryckmani (Hemiptera: Reduviidae) in the laboratory, feeding patterns in nature and experimental infection with Trypanosoma cruzi
Mem. Inst. Oswaldo Cruz
; 105(1): 99-102, Feb. 2010. tab
Article
em En
| LILACS
| ID: lil-539302
Biblioteca responsável:
BR1.1
ABSTRACT
A cohort initiated with 121 eggs, yielding 105 first instar nymphs (eclosion rate 86.78 percent), allowed us to observe the entire life cycle of Triatoma ryckmani under laboratory conditions (24ºC and 62 percent 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 percent). 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.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Contexto em Saúde:
3_ND
Base de dados:
LILACS
Assunto principal:
Triatoma
/
Trypanosoma cruzi
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Comportamento Alimentar
/
Estágios do Ciclo de Vida
Tipo de estudo:
Prognostic_studies
Limite:
Animals
Idioma:
En
Revista:
Mem. Inst. Oswaldo Cruz
Ano de publicação:
2010
Tipo de documento:
Article