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The vector ecology of introduced Culex quinquefasciatus populations, and implications for future risk of West Nile virus emergence in the Galápagos archipelago.
Eastwood, G; Cunningham, A A; Kramer, L D; Goodman, S J.
Afiliação
  • Eastwood G; School of Biology, University of Leeds, Leeds, U.K.
  • Cunningham AA; Wildlife Epidemiology, Institute of Zoology, Zoological Society of London, London, U.K.
  • Kramer LD; Galápagos Genetics, Epidemiology and Pathology Laboratory, Santa Cruz, Ecuador.
  • Goodman SJ; New York State Department of Health, Wadsworth Center, New York, NY, U.S.A.
Med Vet Entomol ; 33(1): 44-55, 2019 03.
Article em En | MEDLINE | ID: mdl-30168152
Culex quinquefasciatus Say (Diptera: Culicidae), an important vector of West Nile virus (WNV) in the U.S.A., was first detected on the Galápagos Islands (Ecuador) in the 1980s. However, little is known of its ecology, distribution or capacity for arbovirus transmission in the Galápagos. We characterize details of lifecycle (including gonotrophic period), temporal abundance, spatial distribution, vector competence and host-feeding behaviour. Culex quinquefasciatus was detected on five islands of the Galápagos during 2006-2011. A period of 7-14 days was required for egg-adult emergence; water salinity above 5 ppt was demonstrated to hinder larval development. Blood-meal analysis indicated feeding on reptiles, birds and mammals. Assessment of WNV vector competency of Galápagos C. quinquefasciatus showed a median infectious dose of 7.41 log10 plaque-forming units per millilitre and evidence of vertical transmission (minimal filial infection rate of 3.7 per 1000 progeny). The distribution of C. quinquefasciatus across the archipelago could be limited by salt intolerance, and its abundance constrained by high temperatures. Feeding behaviour indicates potential to act as a bridge vector for transmission of pathogens across multiple taxa. Vertical transmission is a potential persistence mechanism for WNV on Galápagos. Together, our results can be used for epidemiological assessments of WNV and target vector control, should this pathogen reach the Galápagos Islands.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Febre do Nilo Ocidental / Culex / Distribuição Animal / Características de História de Vida / Mosquitos Vetores Tipo de estudo: Etiology_studies / Prognostic_studies Limite: Animals País/Região como assunto: America do sul / Ecuador Idioma: En Revista: Med Vet Entomol Assunto da revista: BIOLOGIA / MEDICINA VETERINARIA Ano de publicação: 2019 Tipo de documento: Article País de publicação: Reino Unido
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Febre do Nilo Ocidental / Culex / Distribuição Animal / Características de História de Vida / Mosquitos Vetores Tipo de estudo: Etiology_studies / Prognostic_studies Limite: Animals País/Região como assunto: America do sul / Ecuador Idioma: En Revista: Med Vet Entomol Assunto da revista: BIOLOGIA / MEDICINA VETERINARIA Ano de publicação: 2019 Tipo de documento: Article País de publicação: Reino Unido