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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 91, No. 4, 1996, pp. 409-413
Bioline Code: oc96081
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 91, No. 4, 1996, pp. 409-413

 en Feeding and Defaecation Patterns in Triatoma sordida
LB Crocco & SS Catala

Abstract

Triatoma sordida is a peridomestic Triatominae  that
could  play an important role in the transmission of
Trypanosoma cruzi, although its vectorial competence is
not well known. The aim of this work was to evaluate two
aspects of the vectorial competence: the feeding behaviour and
defaecation patterns, and to compare them with T.infestans.  
The feeding and defaecation patterns were studied in adults 
and fifth instar nymphs of T. sordida fed ad libitum on a 
restrained pigeon. The results showed how the blood meal size 
controls excretion behaviour. Blood intake and time to first 
defaecation showed a significant negative correlation. Adults 
and nymphs frequently defaecated during the blood meal, 
reaching the maximum frequency within the first 10 minutes.

Keywords
Triatoma sordida - feeding -defaecation - peridomestic

 
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