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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 97, No. 6, 2002, pp. 865-867
Bioline Code: oc02165
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 97, No. 6, 2002, pp. 865-867

 en Aggregation Mediated by Faeces and Footprints in Triatoma pseudomaculata check for this species in other resources (Heteroptera: Reduviidae), a Chagas Disease Vector
Ana Cristina R Vitta; Alicia N Lorenzo Figueiras; Claudio R Lazzari; Liléia Diotaiuti & Marcelo G Lorenzo


The behavioural response of Triatoma pseudomaculata check for this species in other resources to chemical substances present in their faeces or cuticle (footprints) was analyzed. Groups of larvae were simultaneously exposed to a clean filter paper and to another paper impregnated with a chemical stimulus in a circular arena. In these choice experiments, the insects aggregated significantly around papers impregnated with dry faeces. In addition, the bugs also showed a significant aggregation response to papers impregnated with compounds derived from their cuticle that were deposited by contact on the substrate. These results indicate that chemical compounds that affect the behaviour of T. pseudomaculata are present in the faeces and in the cuticle of this species. Results are discussed in relation to chemical communication in the Triatominae, as well as to the potential use of these substances in traps or sensors for the detection of this species.

Triatominae - Chagas disease - aggregation - behaviour - pheromones

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