Peroral susceptibility of Aedes albifasciatus and Culex pipiens complex mosquitoes (Diptera: Culicidae) from Argentina to western equine encephalitis virus

Detalhes bibliográficos
Autor(a) principal: Aviles, Gabriela
Data de Publicação: 1990
Outros Autores: Sabattini, Marta S., Mitchell, Carl J.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Revista de Saúde Pública
Texto Completo: https://www.revistas.usp.br/rsp/article/view/23745
Resumo: The transmission cycle of western equine encephalitis (WEE) virus in South America is unknown. A WEE virus strain was isolated from Aedes albifasciatus in Argentina during the WEE epizootic of 1982-83. Also, Culex pipiens from Argentina was reported to be able to transmit WEE virus experimentally, but other results indicate that Cx. pipiens from the USA is refractory to this virus. We determined the susceptibility of Argentina strains of Ae. albifasciatus and Culex pipiens complex mosquites to infection by WEE virus by the oral route. Adult females were fed on chicks infected with a WEE virus strain isolated in Cordoba Province, Argentina, or were fed on a blood/virus suspension. Each mosquito ingested between 10(1.6) to 10(6.4) vero cell plaque-forming units of virus. Each of 28 Ae. albifasciatus was positive for virus from the fourth day postfeeding, and there was evidence for virus replication. In contrast, 0/44 Cx. p. quinquefasciatus and only 1/15 Cx. p. pipiens was positive. Aedes albifasciatus is susceptible to infection by WEE virus and should be considered a potential vector of this virus in Argentina. Both subspecies of Cx. pipiens are refractory to peroral infection by WEE virus and probably do not play a role in the WEE virus cycle in Argentina.
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spelling Peroral susceptibility of Aedes albifasciatus and Culex pipiens complex mosquitoes (Diptera: Culicidae) from Argentina to western equine encephalitis virus Suscetibilidade por via oral dos mosquitos Aedes albifasciatus e do complexo Culex pipiens (Diptera: Culicidae) da Argentina ao virus da encefalite eqüina tipo oeste Aedes^i2^smicrobioloCulex^i2^smicrobioloVírus da encefalite eqüina ocidental^i2^spatogenicidAedes^i1^smicrobiolCulex^i1^smicrobiolEncephalitis viruswestern equine^i1^spathogenic The transmission cycle of western equine encephalitis (WEE) virus in South America is unknown. A WEE virus strain was isolated from Aedes albifasciatus in Argentina during the WEE epizootic of 1982-83. Also, Culex pipiens from Argentina was reported to be able to transmit WEE virus experimentally, but other results indicate that Cx. pipiens from the USA is refractory to this virus. We determined the susceptibility of Argentina strains of Ae. albifasciatus and Culex pipiens complex mosquites to infection by WEE virus by the oral route. Adult females were fed on chicks infected with a WEE virus strain isolated in Cordoba Province, Argentina, or were fed on a blood/virus suspension. Each mosquito ingested between 10(1.6) to 10(6.4) vero cell plaque-forming units of virus. Each of 28 Ae. albifasciatus was positive for virus from the fourth day postfeeding, and there was evidence for virus replication. In contrast, 0/44 Cx. p. quinquefasciatus and only 1/15 Cx. p. pipiens was positive. Aedes albifasciatus is susceptible to infection by WEE virus and should be considered a potential vector of this virus in Argentina. Both subspecies of Cx. pipiens are refractory to peroral infection by WEE virus and probably do not play a role in the WEE virus cycle in Argentina. Desconhece-se o ciclo de transmissão da encefalite eqüina tipo oeste (WEE) na América do Sul. Uma cepa do vírus foi isolada na Argentina, durante a epizootia de 1982-1983, a partir de Aedes albifasciatus. Sob o ponto de vista experimental, o Culex pipiens da Argentina revelou-se capaz de transmitir o vírus WEE, porém outros resultados têm indicado que o Cx. pipiens dos Estados Unidos é refratário a esse vírus. Assim, procurou-se determinar a suscetibilidade de cepas argentinas de Ae. albifasciatus e complexo Culex pipiens, à infecção do vírus WEE por via oral. As fêmeas adultas foram alimentadas em pintos infectados com cepa do vírus isolada na Província de Córdoba, Argentina, ou então alimentadas em suspensão do vírus e sangue. Cada mosquito ingeriu entre 10(1,6) e 10(6,4) unidades virais formadoras de placas de cultura de célula ("vero cell"). Cada um dos 28 Ae. albifasciatus mostrou-se a partir do quarto dia pós-prandial e houve evidência de replicação viral. Em contraposição, 0/44 Cx. p. quinquefasciatus e apenas 1/15 Cx. p. pipiens revelou-se positivo. Aedes albifasciatus é suscetível à infecção pelo vírus WEE e deveria ser considerado vetor potencial desse agente na Argentina. Ambas subespécies de Cx. pipiens são refratárias à infecção por via oral e provavelmente não desempenham papel do ciclo do vírus WEE na Argentina. Universidade de São Paulo. Faculdade de Saúde Pública1990-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://www.revistas.usp.br/rsp/article/view/2374510.1590/S0034-89101990000400003Revista de Saúde Pública; Vol. 24 No. 4 (1990); 265-269 Revista de Saúde Pública; Vol. 24 Núm. 4 (1990); 265-269 Revista de Saúde Pública; v. 24 n. 4 (1990); 265-269 1518-87870034-8910reponame:Revista de Saúde Públicainstname:Universidade de São Paulo (USP)instacron:USPenghttps://www.revistas.usp.br/rsp/article/view/23745/25781Copyright (c) 2017 Revista de Saúde Públicainfo:eu-repo/semantics/openAccessAviles, GabrielaSabattini, Marta S.Mitchell, Carl J.2012-05-28T20:46:48Zoai:revistas.usp.br:article/23745Revistahttps://www.revistas.usp.br/rsp/indexONGhttps://www.revistas.usp.br/rsp/oairevsp@org.usp.br||revsp1@usp.br1518-87870034-8910opendoar:2012-05-28T20:46:48Revista de Saúde Pública - Universidade de São Paulo (USP)false
dc.title.none.fl_str_mv Peroral susceptibility of Aedes albifasciatus and Culex pipiens complex mosquitoes (Diptera: Culicidae) from Argentina to western equine encephalitis virus
Suscetibilidade por via oral dos mosquitos Aedes albifasciatus e do complexo Culex pipiens (Diptera: Culicidae) da Argentina ao virus da encefalite eqüina tipo oeste
title Peroral susceptibility of Aedes albifasciatus and Culex pipiens complex mosquitoes (Diptera: Culicidae) from Argentina to western equine encephalitis virus
spellingShingle Peroral susceptibility of Aedes albifasciatus and Culex pipiens complex mosquitoes (Diptera: Culicidae) from Argentina to western equine encephalitis virus
Aviles, Gabriela
Aedes^i2^smicrobiolo
Culex^i2^smicrobiolo
Vírus da encefalite eqüina ocidental^i2^spatogenicid
Aedes^i1^smicrobiol
Culex^i1^smicrobiol
Encephalitis virus
western equine^i1^spathogenic
title_short Peroral susceptibility of Aedes albifasciatus and Culex pipiens complex mosquitoes (Diptera: Culicidae) from Argentina to western equine encephalitis virus
title_full Peroral susceptibility of Aedes albifasciatus and Culex pipiens complex mosquitoes (Diptera: Culicidae) from Argentina to western equine encephalitis virus
title_fullStr Peroral susceptibility of Aedes albifasciatus and Culex pipiens complex mosquitoes (Diptera: Culicidae) from Argentina to western equine encephalitis virus
title_full_unstemmed Peroral susceptibility of Aedes albifasciatus and Culex pipiens complex mosquitoes (Diptera: Culicidae) from Argentina to western equine encephalitis virus
title_sort Peroral susceptibility of Aedes albifasciatus and Culex pipiens complex mosquitoes (Diptera: Culicidae) from Argentina to western equine encephalitis virus
author Aviles, Gabriela
author_facet Aviles, Gabriela
Sabattini, Marta S.
Mitchell, Carl J.
author_role author
author2 Sabattini, Marta S.
Mitchell, Carl J.
author2_role author
author
dc.contributor.author.fl_str_mv Aviles, Gabriela
Sabattini, Marta S.
Mitchell, Carl J.
dc.subject.por.fl_str_mv Aedes^i2^smicrobiolo
Culex^i2^smicrobiolo
Vírus da encefalite eqüina ocidental^i2^spatogenicid
Aedes^i1^smicrobiol
Culex^i1^smicrobiol
Encephalitis virus
western equine^i1^spathogenic
topic Aedes^i2^smicrobiolo
Culex^i2^smicrobiolo
Vírus da encefalite eqüina ocidental^i2^spatogenicid
Aedes^i1^smicrobiol
Culex^i1^smicrobiol
Encephalitis virus
western equine^i1^spathogenic
description The transmission cycle of western equine encephalitis (WEE) virus in South America is unknown. A WEE virus strain was isolated from Aedes albifasciatus in Argentina during the WEE epizootic of 1982-83. Also, Culex pipiens from Argentina was reported to be able to transmit WEE virus experimentally, but other results indicate that Cx. pipiens from the USA is refractory to this virus. We determined the susceptibility of Argentina strains of Ae. albifasciatus and Culex pipiens complex mosquites to infection by WEE virus by the oral route. Adult females were fed on chicks infected with a WEE virus strain isolated in Cordoba Province, Argentina, or were fed on a blood/virus suspension. Each mosquito ingested between 10(1.6) to 10(6.4) vero cell plaque-forming units of virus. Each of 28 Ae. albifasciatus was positive for virus from the fourth day postfeeding, and there was evidence for virus replication. In contrast, 0/44 Cx. p. quinquefasciatus and only 1/15 Cx. p. pipiens was positive. Aedes albifasciatus is susceptible to infection by WEE virus and should be considered a potential vector of this virus in Argentina. Both subspecies of Cx. pipiens are refractory to peroral infection by WEE virus and probably do not play a role in the WEE virus cycle in Argentina.
publishDate 1990
dc.date.none.fl_str_mv 1990-08-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://www.revistas.usp.br/rsp/article/view/23745
10.1590/S0034-89101990000400003
url https://www.revistas.usp.br/rsp/article/view/23745
identifier_str_mv 10.1590/S0034-89101990000400003
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://www.revistas.usp.br/rsp/article/view/23745/25781
dc.rights.driver.fl_str_mv Copyright (c) 2017 Revista de Saúde Pública
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2017 Revista de Saúde Pública
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade de São Paulo. Faculdade de Saúde Pública
publisher.none.fl_str_mv Universidade de São Paulo. Faculdade de Saúde Pública
dc.source.none.fl_str_mv Revista de Saúde Pública; Vol. 24 No. 4 (1990); 265-269
Revista de Saúde Pública; Vol. 24 Núm. 4 (1990); 265-269
Revista de Saúde Pública; v. 24 n. 4 (1990); 265-269
1518-8787
0034-8910
reponame:Revista de Saúde Pública
instname:Universidade de São Paulo (USP)
instacron:USP
instname_str Universidade de São Paulo (USP)
instacron_str USP
institution USP
reponame_str Revista de Saúde Pública
collection Revista de Saúde Pública
repository.name.fl_str_mv Revista de Saúde Pública - Universidade de São Paulo (USP)
repository.mail.fl_str_mv revsp@org.usp.br||revsp1@usp.br
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