Mortality profiles of Rhodnius prolixus (Heteroptera: Reduviidae), vector of Chagas disease

Acta Tropica
Luis Fernando ChavesJ E Rabinovich

Abstract

Life table data of Rhodnius prolixus (Heteroptera: Reduviidae) kept at laboratory conditions were analysed in search for mortality patterns. Gompertz and Weibull mortality models seem adequate to explain the sigmoid shape of the survivorship curve. A significant fit was obtained with both models for females (R(2) = 0.70, P < 0.0005 for the Gompertz model; R(2) = 0.78, P < 0.0005 for the Weibull model) and for males (R(2) = 0.39, P < 0.0005 for the Gompertz model; R(2) = 0.48, P < 0.0005 for the Weibull model). The mortality parameter (b) is higher for females in Gompertz and Weibull models, using smoothed and non-smoothed data (P < 0.05), revealing a significant sex mortality differential. Given the particular life history of this insect, the non-linear relationship between the force of mortality and age may have an important impact in the vectorial capacity of R. prolixus as Chagas disease vector, and its consideration should be included as an important factor in the transmission of Trypanosoma cruzi by triatomines.

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Citations

Jun 23, 2012·PloS One·Vasiliy N NovoseltsevAlicia M Ellis
Aug 19, 2011·Journal of Medical Entomology·Jorge Eduardo Rabinovich, Eliana Lorena Nieves
Jan 7, 2016·Parasites & Vectors·Diana Erazo, Juan Cordovez
Jul 4, 2009·Arthropod Structure & Development·R G Chiang, M J O'Donnell
Dec 19, 2012·Trends in Parasitology·Dmitri A MaslovJulius Lukeš
Nov 26, 2008·Acta Tropica·J P DujardinS Catalá
Jan 13, 2015·Environmental Health Insights·Juan M Cordovez, Camilo Sanabria
Sep 9, 2005·DNA Sequence : the Journal of DNA Sequencing and Mapping·Toru NishinakaRobert Chiu

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