The Mosquito, the Virus, the Climate: An Unforeseen Réunion in 2018
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The Mosquito, the Virus, the Climate: An Unforeseen Réunion in 2018

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Details:

  • Journal Title:
    GeoHealth
  • Personal Author:
  • NOAA Program & Office:
    OAR (Oceanic and Atmospheric Research)
  • Description:
    The 2018 outbreak of dengue in the French overseas department of Réunion was unprecedented in size and spread across the island. This research focuses on the cause of the outbreak, asserting that climate played a large role in the proliferation of the Aedes albopictus mosquitoes, which transmitted the disease, and led to the dengue outbreak in early 2018. A stage‐structured model was run using observed temperature and rainfall data to simulate the life cycle and abundance of the Ae. albopictus mosquito. Further, the model was forced with bias‐corrected subseasonal forecasts to determine if the event could have been forecast up to 4 weeks in advance. With unseasonably warm temperatures remaining above 25°C, along with large tropical‐cyclone‐related rainfall events accumulating 10–15 mm per event, the modeled Ae. albopictus mosquito abundance did not decrease during the second half of 2017, contrary to the normal behavior, likely contributing to the large dengue outbreak in early 2018. Although subseasonal forecasts of rainfall for the December–January period in Réunion are skillful up to 4 weeks in advance, the outbreak could only have been forecast 2 weeks in advance, which along with seasonal forecast information could have provided enough time to enhance preparedness measures. Our research demonstrates the potential of using state‐of‐the‐art subseasonal climate forecasts to produce actionable subseasonal dengue predictions. To the best of the authors' knowledge, this is the first time subseasonal forecasts have been used this way.
  • Keywords:
  • Source:
    GeoHealth 4(8): e2020GH000253, 2020
  • DOI:
  • Pubmed Central ID:
    PMC32864539
  • Document Type:
    Journal Article
  • Funding:
    Grant no. NA18OAR4310339
  • Place as Subject:
    Réunion
  • Rights Information:
    CC BY-NC-ND
  • Compliance:
    PMC
  • Main Document Checksum:
  • Download URL:
  • File Type:

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