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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 99, No. 6, 2004, pp. 591-595
Bioline Code: oc04125
Full paper language: Portuguese
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 99, No. 6, 2004, pp. 591-595

 en
Dayse da Silva Rocha; Carolina Magalhães dos Santos; Vanda Cunha; José Jurberg & Cleber Galvão

Abstract

Life cycle of Rhodnius brethesi check for this species in other resources Matta, 1919 (Hemiptera, Reduviidae, Triatominae), a potential vector of Chagas disease in the Amazon region - R. brethesi is a sylvatic species from the Amazon region; it has been incriminated as responsible for the transmission of Chagas disease in collectors of piaçaba in this region. The aim of present study was to investigate the efficiency of these insects as potential vectors of Trypanosoma cruzi check for this species in other resources . Aspects related with feeding and defecation patterns, life time, and mortality had been observed in each instar of R. brethesi. We use 5th instar nymphs to get adults virgins, after the moulting 3 groups with 6 females and 2 males each were created to obtain eggs. After hatching, 1st instar nymphs had been weighed and kept in bottles until the next moult. Insects were fed once a week in mice. Results showed that the average period of incubation was 17 days, the number of blood meal was increasing from the 1st to the 5th instar nymph with 7 (average) to become adult, a significative numbers of the defecations occurring immediately after the bloodmeals. The total percentual of mortality was 16%. This results suggests that this species presents a good exploitation of blood meals and a brief nymphal development in laboratory conditions reflecting its behavior in sylvatic environments.

Keywords
Chagas disease - Brazilian Amazon - Triatominae - life cycle - Rhodnius brethesi

 
 pt Ciclo Biológico em Laboratório de Rhodnius brethesi check for this species in other resources Matta, 1919 (Hemiptera, Reduviidae, Triatominae), Potencial Vetor Silvestre da Doença de Chagas na Amazônia
Dayse da Silva Rocha; Carolina Magalhães dos Santos; Vanda Cunha; José Jurberg & Cleber Galvão

 
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