Alterations in the fat body and midgut of Culex quinquefasciatus larvae following exposure to different insecticides
Autor(a) principal: | |
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Data de Publicação: | 2010 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | LOCUS Repositório Institucional da UFV |
Texto Completo: | https://doi.org/10.1016/j.micron.2010.04.004 http://www.locus.ufv.br/handle/123456789/22054 |
Resumo: | 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. |
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Alterations in the fat body and midgut of Culex quinquefasciatus larvae following exposure to different insecticidesMosquitoInsecticidesAvermectinMidgutCulexThis 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.Micron2018-09-27T16:50:36Z2018-09-27T16:50:36Z2010-08info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlepdfapplication/pdf09684328https://doi.org/10.1016/j.micron.2010.04.004http://www.locus.ufv.br/handle/123456789/22054engv. 41, n. 6, p. 592-597, ago. 2010Elsevier Ltd.info:eu-repo/semantics/openAccessSerrão, José EduardoAlves, Stênio NunesMelo, Alan Lanereponame:LOCUS Repositório Institucional da UFVinstname:Universidade Federal de Viçosa (UFV)instacron:UFV2024-07-12T07:16:42Zoai:locus.ufv.br:123456789/22054Repositório InstitucionalPUBhttps://www.locus.ufv.br/oai/requestfabiojreis@ufv.bropendoar:21452024-07-12T07:16:42LOCUS Repositório Institucional da UFV - Universidade Federal de Viçosa (UFV)false |
dc.title.none.fl_str_mv |
Alterations in the fat body and midgut of Culex quinquefasciatus larvae following exposure to different insecticides |
title |
Alterations in the fat body and midgut of Culex quinquefasciatus larvae following exposure to different insecticides |
spellingShingle |
Alterations in the fat body and midgut of Culex quinquefasciatus larvae following exposure to different insecticides Serrão, José Eduardo Mosquito Insecticides Avermectin Midgut Culex |
title_short |
Alterations in the fat body and midgut of Culex quinquefasciatus larvae following exposure to different insecticides |
title_full |
Alterations in the fat body and midgut of Culex quinquefasciatus larvae following exposure to different insecticides |
title_fullStr |
Alterations in the fat body and midgut of Culex quinquefasciatus larvae following exposure to different insecticides |
title_full_unstemmed |
Alterations in the fat body and midgut of Culex quinquefasciatus larvae following exposure to different insecticides |
title_sort |
Alterations in the fat body and midgut of Culex quinquefasciatus larvae following exposure to different insecticides |
author |
Serrão, José Eduardo |
author_facet |
Serrão, José Eduardo Alves, Stênio Nunes Melo, Alan Lane |
author_role |
author |
author2 |
Alves, Stênio Nunes Melo, Alan Lane |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Serrão, José Eduardo Alves, Stênio Nunes Melo, Alan Lane |
dc.subject.por.fl_str_mv |
Mosquito Insecticides Avermectin Midgut Culex |
topic |
Mosquito Insecticides Avermectin Midgut Culex |
description |
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. |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010-08 2018-09-27T16:50:36Z 2018-09-27T16:50:36Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
09684328 https://doi.org/10.1016/j.micron.2010.04.004 http://www.locus.ufv.br/handle/123456789/22054 |
identifier_str_mv |
09684328 |
url |
https://doi.org/10.1016/j.micron.2010.04.004 http://www.locus.ufv.br/handle/123456789/22054 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
v. 41, n. 6, p. 592-597, ago. 2010 |
dc.rights.driver.fl_str_mv |
Elsevier Ltd. info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Elsevier Ltd. |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
pdf application/pdf |
dc.publisher.none.fl_str_mv |
Micron |
publisher.none.fl_str_mv |
Micron |
dc.source.none.fl_str_mv |
reponame:LOCUS Repositório Institucional da UFV instname:Universidade Federal de Viçosa (UFV) instacron:UFV |
instname_str |
Universidade Federal de Viçosa (UFV) |
instacron_str |
UFV |
institution |
UFV |
reponame_str |
LOCUS Repositório Institucional da UFV |
collection |
LOCUS Repositório Institucional da UFV |
repository.name.fl_str_mv |
LOCUS Repositório Institucional da UFV - Universidade Federal de Viçosa (UFV) |
repository.mail.fl_str_mv |
fabiojreis@ufv.br |
_version_ |
1822610618513883136 |