Similarly,
Record case tropical viruses: should:
It only took a summer for France to realize what record case tropical viruses: should scientists have announced for years: arboviroses. Therefore, these viral diseases transmitted by mosquitoes, are no longer confined to the tropics. Furthermore, They are with us, and they settle down.
The 2025 season in mainland France marks a record. Nevertheless, The chikungunya explodes with more than 150 local cases, while dengue continues its discreet advance. However, And for the first time, the Western Nile virus touched the inhabitants of Île-de-France. Consequently, The observation is placed, the figures are clear, and the issues are high. For example, It is no longer an imported phenomenon, but a soon rooted phenomenon.
France taken by assault by tropical viruses – Record case tropical viruses: should
Chikungunya: a sad record summer – Record case tropical viruses: should
As of August 19. In addition, 2025, Public Health France confirmed 154 Aboriginal cases of Chikungunya, distributed in 34 distinct homes. In addition, It is the highest level ever recorded in France. Nevertheless, record case tropical viruses: should This virus, which causes a high fever, intense joint pain and prolonged fatigue, diffused far beyond its usual territory.
If the regions traditionally exposed such as Paca. In addition, Occitanie and Corsica remain on the front line, cases have also appeared in more unexpected areas: Grand Est, Nouvelle-Aquitaine, Bourgogne-Franche-Comté. Therefore, A disturbing geographic expansion, which illustrates the capacity of the tiger mosquito to colonize new territories including in temperate areas.
This phenomenon is partly explained by the major epidemic which occurred in Reunion in the spring of 2025. with more than 22,000 cases identified. Many travelers reported the virus in mainland France. where the already well established tiger mosquito was able to take over from the transmission.
Dengue: a more moderate but constant progression – Record case tropical viruses: should
In 2025. dengue did not make a spectacular outbreak, but confirmed its sustainable presence on metropolitan territory. Public Health France lists 13 Aboriginal cases, spread record case tropical viruses: should over 7 separate households.
The disease, often confused with strong flu, can cause muscle pain, fever and great fatigue. If the majority of cases are mild, severe forms, called hemorrhagic, can occur, especially during successive infections.
In 2024, there were already 83 Aboriginal cases. This shows that dengue does not regress. and that the transmission conditions are strengthened each year, as the Tiger mosquito continues its progression.
Western Nile virus: a discreet but disturbing virus
Less known to the general public. the Western Nile virus nevertheless deserves particular vigilance. Transmitted by “classic” mosquitoes of the type Culexit is capable of provoking severe neurological forms, such as meningitis or encephalitis.
In 2025, 13 indigenous cases were identified in six departments, and for the first time, in Île-de-France. This progression to the north is a clear alert for the health authorities. Especially since in 80 % of cases, infection goes unnoticed, record case tropical viruses: should which makes its detection more complex.
Even if the serious forms are rare (around 1 % of cases), the risk is real in the elderly or immunocompromised.
Tropical viruses: the symptoms to know
Diseases transmitted by mosquitoes should not be taken lightly. even if their symptoms can, at first, look like a flu.
Chikungunya :
- Sudden appearance of high fever
- Intense joint pain. often disabling
- Persistent fatigue
- Please note: pain can last several weeks, or even several months, even after the disappearance of the virus.
Dengue:
- Strong fever. often accompanied by aches and headaches
- Possible nausea or digestive discomfort
- In some cases, the disease can evolve towards a hemorrhagic form, requiring rapid hospitalization.
Virus of the Western Nile :
- In 8 out of 10 cases: no symptoms
- Sometimes: moderate fever. fatigue, diffuse pain
- In fragile people, record case tropical viruses: should the virus can cause serious neurological complications: meningitis, encephalitis, even paralysis.
These alert signals are sometimes discreet. However. in the middle of summer, if you have a brutal fever, unusual pain or abnormal fatigue, especially after a mosquito bite or a stay in the infested zone, it is essential to consult a healthcare professional without waiting.
Why do these viruses progress so fast?
The climate, the main engine of expansion
The link between climate and mosquitoes is no longer to be demonstrated. Longer summers. more irregular rains, and softer winters promote the proliferation of vectors vectors like Aedes Albopictus (the Tiger mosquito) and Culex Pipiens, vector of the Western Nile virus.
According to the ECDC (European Center for Disease Prevention. Control), the Tiger mosquito is now established in 16 European countries, compared to only 8 in 2013. In France, it is present record case tropical viruses: should in 81 departments out of 96 in 2025 according to Public Health France.
Globalization, an aggravating factor
International trips, tourism and trade promote the importation of tropical viruses. It is enough that an infected traveler arrives in an area where the mosquito is present so that the. local transmission begins.
Prevention: the right gestures to adopt now
The fight against these viruses is based above all on prevention. And the first step is to break the reproduction cycle of the mosquito.
At home:
- Regularly empty the cups under the flower pots
- Cover the water recuperators
- Clean the gutters
- Eliminate a very small container that can contain stagnant water
Outside:
- Wear long. clear clothes
- Use effective repellents (Deet, IR3535)
- Install mosquito nets in the windows and around the beds
In case of symptoms:
- Consult your doctor quickly
- Avoid being bitten so as not to promote transmission (isolation, repulsive, mosquito net)
record case tropical viruses: should
And the vaccines, where are we?
On the Chikungunya side. a vaccine named IXCHIQ® has been authorized by EMA since 2023, but its use remains limited, in particular due to an absence of recommendation for those over 65 at this stage. For dengue. the Qdenga® vaccine is available in France, but only for people who have already contracted the disease, to avoid serious forms.
For the Western Nile virus, no vaccine is available to date for humans, only vector prevention is effective.
NAMELY
According to the ECDC, the summer of 2025 experienced record progression of the Western Nile virus. The latter caused 335 cases and 19 deaths in eight countries, mainly in Italy. Additionally, The tiger mosquito is now established in 16 European countries.
Register for our newsletter
My health
Further reading: Mosquito-tiger: in Occitania, already 90 imported cases and 28 Aboriginal people from DEENGE, CHIKUNGUNYA, ZIKA … – Infants and preschool children have unique long signs – A new drug release system eliminates tumors in 82% of patients with high -risk bladder cancer – Children’s vaccines: why so many parents are struggling to get the recall this summer – This signal to take very seriously and which can translate a symptom of Alzheimer’s disease.
