4.7 Article

Impact of temperature on dengue and chikungunya transmission by the mosquito Aedes albopictus

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SCIENTIFIC REPORTS
卷 12, 期 1, 页码 -

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NATURE PORTFOLIO
DOI: 10.1038/s41598-022-10977-4

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  1. French Government's Investissement d'Avenir program, Laboratoire d'Excellence Integrative Biology of Emerging Infectious Diseases [ANR-10-LABX-62-IBEID]
  2. European Commission [282589]

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The invasive mosquito Ae. albopictus can transmit CHIKV and DENV, and temperature is a key factor in limiting their transmission. Local transmissions of these viruses have been reported in southern Europe, but it is uncertain how far north transmission could occur.
The mosquito Aedes albopictus is an invasive species first detected in Europe in Albania in 1979, and now established in 28 European countries. Temperature is a limiting factor in mosquito activities and in the transmission of associated arboviruses namely chikungunya (CHIKV) and dengue (DENV). Since 2007, local transmissions of CHIKV and DENV have been reported in mainland Europe, mainly in South Europe. Thus, the critical question is how far north transmission could occur. In this context, the Albanian infestation by Ae. albopictus is of interest because the species is present up to 1200 m of altitude; this allows using altitude as a proxy for latitude. Here we show that Ae. albopictus can transmit CHIKV at 28 degrees C as well as 20 degrees C, however, the transmission of DENV is only observed at 28 degrees C. We conclude that if temperature is the key environmental factor limiting transmission, then transmission of CHIKV, but not DENV is feasible in much of Europe.

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