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Effects of the infection with Trypanosoma cruzi on the feeding and excretion/defecation patterns of Triatoma infestans

Published online by Cambridge University Press:  24 July 2019

N. Pereyra ,
P.A. Lobbia Open the ORCID record for P.A. Lobbia [Opens in a new window]  and
G. Mougabure-Cueto
N. Pereyra
Affiliation:
Laboratorio de Investigación en Triatominos (LIT), Centro de Referencia de Vectores (CeReVe), Coordinación de Vectores, Ministerio de Salud y Desarrollo Social de la Nación. Hospital Colonia-Pabellón Rawson calle s/n, Santa María de Punilla, Córdoba, Argentina
P.A. Lobbia*
Affiliation:
Laboratorio de Investigación en Triatominos (LIT), Centro de Referencia de Vectores (CeReVe), Coordinación de Vectores, Ministerio de Salud y Desarrollo Social de la Nación. Hospital Colonia-Pabellón Rawson calle s/n, Santa María de Punilla, Córdoba, Argentina Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
G. Mougabure-Cueto
Affiliation:
Laboratorio de Investigación en Triatominos (LIT), Centro de Referencia de Vectores (CeReVe), Coordinación de Vectores, Ministerio de Salud y Desarrollo Social de la Nación. Hospital Colonia-Pabellón Rawson calle s/n, Santa María de Punilla, Córdoba, Argentina Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
*
*Author for correspondence Phone: (54 3541) 481709 Fax: +54 9 3541 481709 E-mail: patalobbia@gmail.com
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Abstract

Transmission of Trypanosma cruzi (Kinetoplastida: Trypanosomatidae) occurs when feces/urine of infected triatomines come into contact with mucous membranes or damaged skin, and this occurs mainly when insects defecate while feeding on the host. Thus, the vector competence of the triatomines is associated with their feeding and excretion/defecation behavior. This work studied for the first time the effect of T. cruzi infection on feeding and excretion/defecation patterns of Triatoma infestans (Hemiptera: Reduviidae). Uninfected and infected fifth-instar nymphs were fed ad libitum and their feeding behavior and defecations were registered during and after feeding. The feeding pattern did not show differences between the experimental groups. However, the infected nymphs began to defecate earlier, defecated in greater quantity and there was a greater proportion of defecating individuals compared to uninfected nymphs. These results show that T. cruzi affected the excretion/defecation pattern of T. infestans in a way that would increase the probability of contact between infective feces and the mammalian host.

Keywords

Triatoma infestansTrypanosoma cruziChagas diseasevector competence
Type
Research Paper
Information
Bulletin of Entomological Research , Volume 110 , Issue 1 , February 2020 , pp. 169 - 176
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Copyright
Copyright © Cambridge University Press 2019 

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