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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 110, No. 5, 2015, pp. 611-617
Bioline Code: oc15082
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 110, No. 5, 2015, pp. 611-617

 en Effect of Leishmania spp infection on the survival, life expectancy, fecundity and fertility of Lutzomyia longipalpis check for this species in other resources and Lutzomyia pseudolongipalpis
Fatima Agrela, Irma & Dora Feliciangeli, Maria

Abstract

We evaluated the effects of Leishmania spp infection on several population parameters of Lutzomyia longipalpis sensu lato> check for this species in other resources and Lutzomyia pseudolongipalpis, vectors of visceral leishmaniasis in Venezuela, under experimental conditions during the first post-feeding period. Females of both species were allowed to feed and engorge on a suspension of fresh washed human red blood cells in foetal calf serum. These blood cells were either non-infected or infected with one of the four Leishmania spp strains and were offered through a chicken skin membrane. The longevity, life expectancy and the fecundity of uninfected flies were similar in both species, but the fertility was significantly lower in uninfected Lu. longipalpis females. In all cases, the infection of Lu. longipalpis and Lu pseudolongipalpis by the Leishmania strains resulted in significant detrimental effects, which exerted a fitness cost expressed by reduced survival and life expectancy, as well as decreased fertility and fecundity compared with the control groups. Nevertheless, differences in these parameters were observed between these vector species depending on whether they were infected with the autochthonous Venezuelan Leishmania infantum strain (NESA) or the Brazilian reference strain (PP75). The experimental data obtained agree with field data on the natural infection of these vector species and the significance of this scenario is discussed.

Keywords
survival; life expectancy; fertility; fecundity; Lutzomyia longipalpis s.l.; Lutzomyia pseudolongipalpis; experimental sandfly infection; Leishmania spp

 
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