Susceptibility of Ochlerotatus taeniorhynchus and Culex nigripalpus for Everglades virus

Lark L. Coffey, Scott Weaver

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Everglades virus (EVEV), an alphavirus in the Venezuelan equine encephalitis (VEE) complex, is a mosquito-borne human pathogen endemic to South Florida. Field isolations of EVEV from Culex (Melanoconion) cedecei and laboratory susceptibility experiments established this species as its primary vector. However, isolates of EVEV from Ochlerotatus taeniorhynchus and Culex nigripalpus, more abundant and widespread species in South Florida, suggested that they also transmit EVEV and could infect many people. We performed susceptibility experiments with F1 generation Oc. taeniorhynchus and Cx. nigripalpus to evaluate their permissiveness to EVEV infection. In contrast to the high degree of susceptibility of Cx. (Mel.) cedecei, Oc. taeniorhynchus and Cx. nigripalpus were relatively refractory to oral EVEV infection, indicating that they are probably not important vectors. Identification of vectors involved in enzootic EVEV transmission will assist in understanding potential changes in vector use that could accompany the emergence of epizootic or epidemic EVEV.

Original languageEnglish (US)
Pages (from-to)11-16
Number of pages6
JournalAmerican Journal of Tropical Medicine and Hygiene
Volume73
Issue number1
StatePublished - Jul 2005

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Ochlerotatus
Culex
Viruses
Virus Diseases
Venezuelan Equine Encephalomyelitides
Permissiveness
Alphavirus
Culicidae

ASJC Scopus subject areas

  • Parasitology
  • Infectious Diseases

Cite this

Susceptibility of Ochlerotatus taeniorhynchus and Culex nigripalpus for Everglades virus. / Coffey, Lark L.; Weaver, Scott.

In: American Journal of Tropical Medicine and Hygiene, Vol. 73, No. 1, 07.2005, p. 11-16.

Research output: Contribution to journalArticle

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abstract = "Everglades virus (EVEV), an alphavirus in the Venezuelan equine encephalitis (VEE) complex, is a mosquito-borne human pathogen endemic to South Florida. Field isolations of EVEV from Culex (Melanoconion) cedecei and laboratory susceptibility experiments established this species as its primary vector. However, isolates of EVEV from Ochlerotatus taeniorhynchus and Culex nigripalpus, more abundant and widespread species in South Florida, suggested that they also transmit EVEV and could infect many people. We performed susceptibility experiments with F1 generation Oc. taeniorhynchus and Cx. nigripalpus to evaluate their permissiveness to EVEV infection. In contrast to the high degree of susceptibility of Cx. (Mel.) cedecei, Oc. taeniorhynchus and Cx. nigripalpus were relatively refractory to oral EVEV infection, indicating that they are probably not important vectors. Identification of vectors involved in enzootic EVEV transmission will assist in understanding potential changes in vector use that could accompany the emergence of epizootic or epidemic EVEV.",
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