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Alterations in the fat body and midgut of Culex quinquefasciatus larvae following exposure to different insecticides

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dc.contributor.author Serrão, José Eduardo
dc.contributor.author Alves, Stênio Nunes
dc.contributor.author Melo, Alan Lane
dc.date.accessioned 2018-09-27T16:50:36Z
dc.date.available 2018-09-27T16:50:36Z
dc.date.issued 2010-08
dc.identifier.issn 09684328
dc.identifier.uri https://doi.org/10.1016/j.micron.2010.04.004
dc.identifier.uri http://www.locus.ufv.br/handle/123456789/22054
dc.description.abstract This study describes morphological alterations in the fat body and midgut of Culex quinquefasciatus larvae following exposure to different insecticides. To this end, both third and fourth instars of C. quinquefasciatus larvae were exposed for 30 and 60 min to organophosphate (50 ppb), pyrethroids (20 and 30 ppb), and avermectin derivates (1.5 and 54 ppb). Following incubation, pH measurements of the larvae gut were recorded. The fat body and midgut were also analyzed by light and transmission electron microscopy. These studies demonstrate a decrease in the pH of the larvae anterior midgut following exposure to all of the tested insecticides. Histochemical tests revealed a strong reaction for neutral lipids in the control group and a marked decrease in the group exposed to cypermethrin. Furthermore, a weak reaction with acidic lipids in larvae exposed to deltamethrin, temephos, ivermectin and abamectin was also observed. Insecticide-exposed larvae also exhibited cytoplasm granule differences, relative to control larvae. Finally, we noted a small reduction in microvilli size in the apex of digestive cells, although vesicles were found to be present. The destructive changes in the larvae were very similar regardless of the type of insecticide analyzed. These data suggest that alterations in the fat body and midgut are a common response to cellular intoxication. en
dc.format pdf pt-BR
dc.language.iso eng pt-BR
dc.publisher Micron pt-BR
dc.relation.ispartofseries v. 41, n. 6, p. 592-597, ago. 2010 pt-BR
dc.rights Elsevier Ltd. pt-BR
dc.subject Mosquito pt-BR
dc.subject Insecticides pt-BR
dc.subject Avermectin pt-BR
dc.subject Midgut pt-BR
dc.subject Culex pt-BR
dc.title Alterations in the fat body and midgut of Culex quinquefasciatus larvae following exposure to different insecticides en
dc.type Artigo pt-BR


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  • Artigos [666]
    Artigos Técnico-científicos na área de Biologia Geral

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