Abstract：
:The mosquito Aedes aegypti is the main vector of Dengue, Chikungunya, Zika, and yellow fever viruses, which are responsible for high human morbidity and mortality. The fight against these pathogens is mainly based on the control of the insect vector with the use of insecticides. Among insecticides, spinosad bioinsecticide is efficient against A. aegypti larvae and may be an alternative for vector control. Here, we investigate the sublethal effects of spinosad during midgut metamorphosis of A. aegypti females and its cumulative effects on blood acquisition capacity and fecundity in adults. We studied the midgut because it is an important model organ directly related to blood acquisition and digestion. Treatment of larvae with spinosad induced oxidative stress, apoptosis, and damage to the midgut cells at all stages of development and in adults. There was a reduction in the number of proliferating cells and the number of enteroendocrine cells in treated individuals. In addition, damage caused by spinosad led to a reduction in oviposition and egg viability of A. aegypti females. Finally, the exposure of mosquito larvae to sublethal concentrations of spinosad interfered with the development of the midgut, arresting the blood digestion and reproduction of adult females with blood digestion and reproduction difficulties.
journal_name
Chemospherejournal_title
Chemosphereauthors
Fernandes KM,Tomé HVV,Miranda FR,Gonçalves WG,Pascini TV,Serrão JE,Martins GFdoi
10.1016/j.chemosphere.2019.01.068subject
Has Abstractpub_date
2019-04-01 00:00:00pages
464-470eissn
0045-6535issn
1879-1298pii
S0045-6535(19)30068-2journal_volume
221pub_type
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