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July 6, 2024

Transovarial transmission in field caught mosquitoes identifies a mechanism for the establishment of Usutu virus in a temperate country

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Authors

MSMirjam SchillingAnimal and Plant Health AgencyBLBecki LawsonZoological Society of LondonSSSimon SpiroZoological Society of London

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Implication

Targeted vector surveillance uncovers transovarial transmission of Usutu virus in wild Culex pipiens, highlighting a viable mechanism for viral overwintering in temperate regions.

Key Points

  • Transovarial transmission of Usutu virus occurs in wild Culex pipiens mosquitoes, demonstrating a clear biological route for the flavivirus to persist in temperate zones.
  • Surveillance detected Usutu virus in 8 of 554 host-seeking female pools and 1 of 202 reared larval pools, providing direct evidence of vertical transmission in vectors.
  • Screening wild-caught larvae reared in captivity highlights vertical transmission across life stages, confirming a viable mechanism for virus overwintering in southeast England.

Cite This Study

Schilling et al. (2024) studied this question.

synapsesocial.com/papers/68e6129eb6db6435875a5b37https://doi.org/10.1101/2024.07.05.602178
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