In summary

• Exposure to ticks in Auvergne-Rhône-Alpes

  • A region covered by large forest areas that provides ideal conditions for ticks, with the exception of very high-altitude mountain areas (the Alps) and along the Rhône Valley

  • 35% of respondents in the 2019 Health Barometer survey reported having been bitten by ticks

• Lyme disease

  • In 2022, the number of new cases estimated by the Sentinelles network in Auvergne-Rhône-Alpes was approximately 7,400

  • The former Auvergne and Rhône-Alpes regions had some of the highest incidence rates in mainland France during the 2017–2022 period

• Tick-borne encephalitis

  • 27 cases reported in Auvergne-Rhône-Alpes between May 2021 and May 2023, including 25 locally acquired cases, making the region—and Haute-Savoie in particular—a major area of TBE circulation in France