Discovery of a novel alphavirus related to Eilat virus

Kyra Hermanns, Florian Zirkel, Anne Kopp, Marco Marklewitz, Innocent B. Rwego, Alejandro Estrada, Thomas R. Gillespie, Christian Drosten, Sandra Junglen

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

Most alphaviruses are transmitted by arthropods and infect vertebrate hosts. An exception is Eilat virus (EILV), the only described alphavirus with a host range restricted to insects. We established a new generic reverse transcription PCR assay for alphaviruses and tested 8860 tropical mosquitoes. We detected a novel alphavirus, tentatively named Taï Forest alphavirus (TALV), in Culex decens mosquitoes collected in Ivory Coast. The full genome was sequenced, and closest similarity was found to EILV. Pairwise amino acid identities to EILV ranged between 67 and 88% for the corresponding proteins, suggesting that TALV defines a proposed new alphavirus species. Phylogenetic analyses placed TALV as a sister species to EILV with a basal relationship to the western equine encephalitis virus complex. In comparison to the highly abundant insect-specific flaviviruses, insect-specific alphaviruses seem to be rare. This new PCR assay can detect novel alphaviruses and may facilitate the identification of additional new alphaviruses.

Original languageEnglish (US)
Pages (from-to)43-49
Number of pages7
JournalJournal of General Virology
Volume98
Issue number1
DOIs
StatePublished - Jan 2017

Bibliographical note

Funding Information:
Funding was received from the Deutsche Forschungsgemeinschaft (grant agreement numbers JU 2857/1-2 and JU 2857/3-2 to S.J.) and by the Deutsches Zentrum f?r Infektionsforschung (DZIF; grant agreement number TTU 01.801 to C.D.).

Keywords

  • Alphavirus
  • Generic RT-PCR
  • Insect-specific
  • Mosquito
  • Repeated sequence elements

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