NDLI: Imidacloprid impairs the post-embryonic development of the midgut in the yellow fever mosquito Stegomyia aegypti (=Aedes aegypti).

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Imidacloprid impairs the post-embryonic development of the midgut in the yellow fever mosquito Stegomyia aegypti (=Aedes aegypti).

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Fernandes, K. M. Gonzaga, W. G. Pascini, T. V. Miranda, F. R. Tomé, H. V. V. Serrão, J. E. Martins, G. F.
Description	Country affiliation: Brazil Author Affiliation: Fernandes KM ( Departamento de Biologia Geral, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil.); Gonzaga WG ( Departamento de Biologia Geral, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil.); Pascini TV ( Departamento de Biologia Geral, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil.); Miranda FR ( Departamento de Biologia Geral, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil.); Tomé HV ( Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil.); Serrão JE ( Departamento de Biologia Geral, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil.); Martins GF ( Departamento de Biologia Geral, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil.)
Abstract	The mosquito Stegomyia aegypti (=Aedes aegypti) (Diptera: Culicidae) is a vector for the dengue and yellow fever viruses. As blood digestion occurs in the midgut, this organ constitutes the route of entry of many pathogens. The effects of the insecticide imidacloprid on the survival of St. aegypti were investigated and the sub-lethal effects of the insecticide on midgut development were determined. Third instar larvae were exposed to different concentrations of imidacloprid (0.15, 1.5, 3.0, 6.0 and 15.0 p.p.m.) and survival was monitored every 24 h for 10 days. Midguts from imidacloprid-treated insects at different stages of development were dissected and processed for analyses by transmission electron microscopy, immunofluorescence microscopy and terminal deoxynucleotidyl transferase dUTP nick-end labelling (TUNEL) assays. Imidacloprid concentrations of 3.0 and 15.0 p.p.m. were found to affect midgut development similarly. Digestive cells of the fourth instar larvae (L4) midgut exposed to imidacloprid had more multilamellar bodies, abundantly found in the cell apex, and more electron-lucent vacuoles in the basal region compared with those from untreated insects. Moreover, imidacloprid interfered with the differentiation of regenerative cells, dramatically reducing the number of digestive and endocrine cells and leading to malformation of the midgut epithelium in adults. The data demonstrate that imidacloprid can reduce the survival of mosquitoes and thus indicate its potentially high efficacy in the control of St. aegypti populations.
File Format	HTM / HTML
ISSN	0269283X
Issue Number	3
Volume Number	29
e-ISSN	13652915
Journal	Medical and Veterinary Entomology
Language	English
Publisher	Wiley-Blackwell
Publisher Date	2015-09-01
Publisher Place	Great Britain (UK)
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Veterinary Medicine Discipline Zoology Aedes Drug Effects Imidazoles Pharmacology Insecticides Nitro Compounds Growth & Development Physiology Animals Female Larva Longevity Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Veterinary Parasitology Ecology, Evolution, Behavior and Systematics Insect Science

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Imidacloprid impairs the post-embryonic development of the midgut in the yellow fever mosquito Stegomyia aegypti (=Aedes aegypti).

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