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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/8063

Title: Triatoma rubrovaria (Blanchard, 1843) (Hemiptera-Reduviidae-Triatominae) III: Patterns of Feeding, Defecation and Resistance to Starvation
Authors: Almeida, Carlos Eduardo
Francischetti, Cesar Nascimento
Pacheco, Raquel S.
Costa, Jane
Keywords: Triatoma rubrovaria - feeding patterns - resistance to starvation
Issue Date: 31-Dec-2003
Publisher: Fundação Oswaldo Cruz, Fiocruz
Citation: Memórias do Instituto Oswaldo Cruz (ISSN: 1678-8060) Vol 98 Num 3
Abstract: Data from the Chagas Disease Control Program indicate a growing domiciliary and peridomiciliary invasion of Triatoma rubrovaria in the State of Rio Grande do Sul, where it has become the most frequent triatomine species captured there since the control of T. infestans. Bionomic characteristics that could influence the vectorial capacity of T. rubrovaria as vector of Trypanosoma cruzi were evaluated: patterns of (i) feeding, (ii) defecation, and (iii) resistance to starvation, using insects fed on mice. Fifty three percent of the females showed a defecation pattern conducive to chagasic transmission, defecating either on or near the bite site. The averages of the resistance to starvation varied from 48.1 to 179 days, for the first and fifth nymphal stages, respectively. Our study shows that with respect to the patterns of feeding, defecation and resistance to fasting, T. rubrovaria presented similar rates to the ones observed for other effective vector species, such as T. infestans. Thus, based on our studies we conclude that T. rubrovaria has biological characteristics that can positively influence its capacity to become infected and transmit T. cruzi, and also to keep residual populations after chemical control interventions.
URI: http://hdl.handle.net/1807/8063
Other Identifiers: http://www.bioline.org.br/abstract?id=oc03082
Rights: Copyright 2003 - Instituto Oswaldo Cruz - Fiocruz
Appears in Collections:Bioline International Legacy Collection

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