Tiger mosquito: 78 out of 96 departments are colonized, several maps to understand the situation in France

In just a few years, the tiger mosquito has set up shop in almost all departments of France and continues to conquer more and more territories.

The tiger mosquito continues its conquest of France. As of January 1, 2024, 78 departments were officially colonized by the insect, according to a map communicated by the Ministry of Health. The northern territories are still putting up a little resistance, from Normandy to the tip of Brittany, Hauts-de-France and part of the Grand-Est region.

Where the tiger mosquito is permanently established in 2024.
Ministry of Health

Once established in a community, it is practically impossible to dislodge the tiger mosquito. Among the colonized departments, we can distinguish two categories: where more than 40% of the municipalities live with the mosquito, and where less than 40% of the municipalities are affected.

We then observe that the departments around the Mediterranean are invaded by the Aedes albopictus mosquito, from its scientific name: the Pyrénées-Orientales, Hérault, Gard, Bouches-du-Rhône, Vaucluse, Var, Alpes- Maritimes and Corsica. The mosquito has also set up shop in the Rhône, Tarn-et-Garonne, Lot-et-Garonne and Paris.

At the end of 2021, the presence of the tiger mosquito was confirmed in 3,934 municipalities in mainland France.

Departments in which at least 40% of municipalities are colonized by the tiger mosquito.
Ministry of Health

The conquests of the mosquito, year after year

The lasting establishment of the tiger mosquito was first noted in 2004 in the Alpes-Maritimes, then in Haute-Corse in 2006. The conquest of the insect has only accelerated since then. Var, Alpes-de-Haute-Provence and Bouches-du-Rhône were affected in 2010, before Occitanie was affected via Gard and Hérault in 2011.

The situation in 2010.
The situation in 2010.
Ministry of Health

By 2012, the tiger mosquito had traveled almost 400 km to Lot-et-Garonne and the Rhône. In 2013, he tasted the Atlantic Ocean by colonizing the Gironde. In 2015, the Paris region was affected by the colonization of Val-de-Marne, while the south continued to be eroded.

The situation in 2015.
The situation in 2015.
Ministry of Health

A large southern half was already definitely host to the tiger mosquito in 2018, while the insect took possession of Paris and Strasbourg. Over the years, Aedes albopictus has become more and more adapted to the departments of northern France.

The situation in 2020.
The situation in 2020.
Ministry of Health

An increasingly high risk of tropical disease transmission

If the tiger mosquito is so worrying, it is not simply because of its itchy bites, but because the insect is capable of transmitting, from man to man, tropical diseases such as dengue fever, chikungunya or the Zika virus.

Occitanie is the region of France where the greatest number of imported and indigenous cases have been recorded. In 2023, 211 imported cases of dengue fever were reported according to the Regional Health Agency. A figure that only grows over the years, since more than 200 cases of dengue fever have already been recorded in Occitania… since the start of 2024.

Every year, the ARS publishes an updated map of the municipalities colonized by the tiger mosquito in Occitania. This shows that the insect is massively present near the Mediterranean and in the Toulouse metropolitan area, but is less likely to live in rural areas.

Colonized municipalities in Occitania in 2024.
Colonized municipalities in Occitania in 2024.
Occitanie regional health agency

No stagnant water for fewer mosquitoes

Whether your town is colonized by the tiger mosquito or not, simple actions can help curb its proliferation. Stagnant water is the insect’s favorite cocoon, thanks to which its eggs develop faster.

This is why it is recommended to cover rain collectors, put away children’s toys, watering cans or gardening tools, clean gutters, sinks and fountains regularly, and finally empty water receptacles at least once a week. stagnant (bowls, saucers, watering cans, buckets, vases, parasol bases, etc.)

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