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Home / Publicações / Negeviruses found in multiple species of mosquitoes from southern Portugal: Isolation, genetic diversity, and replication in insect cell culture

Negeviruses found in multiple species of mosquitoes from southern Portugal: Isolation, genetic diversity, and replication in insect cell culture

  • Autores: Abecasis A, Carapeta S, de Almeida AP, de Matos AP, do Bem B, Esteves A, Lopes A, McGuinness J, Parreira R, Piedade J
  • Ano de Publicação: 2015
  • Journal: Virology
  • Link: https://www.sciencedirect.com/science/article/pii/S0042682215002329%20

In this report, an RT-PCR approach based on the use of degenerate primers allowed the identification of negeviruses in four different species of mosquitoes (Ochlerotatus caspius, Culex pipiens, Cx. theileri and Cx. univittatus) collected in southern Portugal. The genomes of two of these viruses, sequenced to full completion, were shown to encode all the proteins encoded by previously described negeviruses. One of these viruses induces exuberant cytopathic effect in insect cell culture, with no obvious signs of apoptosis induction, replicating very rapidly and allowing for the detection of viral genomes in the infected culture supernatant as soon as 4h post-infection. This virus was also shown to use a dsRNA intermediate, which was found to be fully formed and active 3h after infection. Phylogenetic analysis of two products encoded by the viral ORF1 placed both viruses among Negev virus cluster, in the recently proposed Nelorpivirus taxon.

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GHTM is a R&D Center that brings together researchers from IHMT with a track record in Tropical Medicine and International/Global Health. It aims at strengthening Portugal's role as a leading partner in the development and implementation of a global health research agenda. Our evidence-based interventions contribute to the promotion of equity in health and to improve the health of populations.

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