1887

Abstract

The genus includes a range of mosquito-specific viruses in addition to well-known medically important arboviruses. Isolation and comprehensive genomic analyses of viruses in mosquitoes collected in Bolivia resulted in the identification of three novel flavivirus species. Psorophora flavivirus (PSFV) was isolated from . The coding sequence of the PSFV polyprotein shares 60 % identity with that of the -associated lineage II insect-specific flavivirus (ISF), Marisma virus. Isolated PSFV replicates in both - and -derived cells, but not in mammalian Vero or BHK-21 cell lines. Two other flaviviruses, Ochlerotatus scapularis flavivirus (OSFV) and Mansonia flavivirus (MAFV), which were identified from and respectively, group with the classical lineage I ISFs. The protein coding sequences of these viruses share only 60 and 40 % identity with the most closely related of known lineage I ISFs, including Xishuangbanna aedes flavivirus and Sabethes flavivirus, respectively. Phylogenetic analysis suggests that MAFV is clearly distinct from the groups of the current known -associated lineage I ISFs. Interestingly, the predicted amino acid sequence of the MAFV capsid protein is approximately two times longer than that of any of the other known flaviviruses. Our results indicate that flaviviruses with distinct features can be found at the edge of the Bolivian Amazon basin at sites that are also home to dense populations of human-biting mosquitoes.

Funding
This study was supported by the:
  • HirofumiSawa , JP16H06429, JP16K21723
  • OrbaYasuko , 20K21298, JP20wm0225018
  • KeitaMatsuno , JP19H03112
  • HirofumiSawa , JP16H05805
  • SoNakagawa , 19H04843
  • HirofumiSawa , JP16H06431
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/content/journal/jgv/10.1099/jgv.0.001518
2021-01-08
2021-03-02
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