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Bloodmeal Host Selection of Culex quinquefasciatus (Diptera: Culicidae) in Las Vegas, Nevada, United States.
Hannon, Emily R; Jackson, Katelin C; Biggerstaff, Brad J; Raman, Vivek; Komar, Nicholas.
Afiliação
  • Hannon ER; Arbovirus Diseases Branch, Division of Vector Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, CO.
  • Jackson KC; Arbovirus Diseases Branch, Division of Vector Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, CO.
  • Biggerstaff BJ; Arbovirus Diseases Branch, Division of Vector Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, CO.
  • Raman V; Southern Nevada Health District, Las Vegas, NV.
  • Komar N; Arbovirus Diseases Branch, Division of Vector Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, CO.
J Med Entomol ; 56(3): 603-608, 2019 04 16.
Article em En | MEDLINE | ID: mdl-30668743
St. Louis encephalitis virus (SLEV) and West Nile virus (WNV) have recently emerged in the southwestern United States. Surveillance for arboviruses in Las Vegas, NV, detected a surge of SLEV activity in the southern house mosquito (Culex quinquefasciatus Say) during 2016. To identify candidate avian amplifiers, we assessed the identification, viral infection, and immune status of vertebrate hosts for 195 blood-engorged Cx. quinquefasciatus mosquitoes collected in August and September 2016. Bloodmeals were identified from 164 engorged abdomens, representing 19 species of birds and three species of mammals. No SLEV or WNV viremia was detected, but one mosquito tested positive for Culex flavivirus. House finch (Haemorhous mexicanus) (Muller) was the most common bloodmeal, followed by domestic chicken (Gallus gallus) (Linnaeus), American robin (Turdus migratorius) L., house sparrow (Passer domesticus) (L.), great-tailed grackle (Quiscalus mexicanus) (Gmelin), northern mockingbird (Mimus polyglottos) (L.) and mourning dove (Zenaida macroura) (L.). SLEV-reactive antibodies were detected in six identified bloodmeals and WNV-reactive antibodies were detected in 33. House sparrow and house finch were the most likely hosts to show previous exposure to SLEV and WNV, respectively. Over-utilization by Cx. quinquefasciatus for bloodmeal hosts was observed primarily among robin, finch and sparrow, all species that roost communally. House finch stands out as a candidate important amplifier for both SLEV and WNV because of its preference by mosquito vectors, and high competence for closely related virus strains. While implicated in previous outbreaks as an important mosquito vector, Cx. quinquefasciatus feeds infrequently on mammals in Las Vegas, indicating a low risk for bridge transmission to humans.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Vírus do Nilo Ocidental / Aves / Cadeia Alimentar / Culex / Vírus da Encefalite de St. Louis / Mamíferos Limite: Animals País/Região como assunto: America do norte Idioma: En Revista: J Med Entomol Ano de publicação: 2019 Tipo de documento: Article País de publicação: Reino Unido
Texto completo
Adicionar na Minha BVS
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XML
PubMed Links
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Vírus do Nilo Ocidental / Aves / Cadeia Alimentar / Culex / Vírus da Encefalite de St. Louis / Mamíferos Limite: Animals País/Região como assunto: America do norte Idioma: En Revista: J Med Entomol Ano de publicação: 2019 Tipo de documento: Article País de publicação: Reino Unido