Every year, Public Health France pilots a surveillance system for Zika, dengue and chikungunya viruses. In 2022, the number of indigenous cases of dengue fever will experience an unprecedented peak.
According to figures published on September 20, 2022, 47 autochthonous cases of dengue have been recorded since July compared to 14 cases in 2020. This sharp increase is explained by the extension of epidemic outbreaks to new departments such as Pyrénées-Orientales, Hautes-Pyrénées and Haute-Garonne. Likewise, the number of cases is increasing due to the resumption of travel to risk areas and the climatic impact with heavy rains and high temperatures.
What effective means of prevention?
The epidemic prevention of dengue is based above all on the fight against mosquito vectors of the disease, including the tiger mosquito. Simple gestures make it possible to limit larval breeding sites: sheltering containers of stagnant water (watering cans, buckets), covering water reserves (basins, cans) or even collecting green waste. In addition, wearing clothing covering the body and using mosquito nets and repellents contribute to effective protection against mosquitoes when traveling to endemic areas.
When a case is reported, the Regional Health Agencies deploy mosquito control operations aimed at eliminating breeding sites and adult insects as quickly as possible using chemicals. The objective is to block the proliferation of mosquitoes. There is a vaccine against the dengue virus, but for the moment its administration is not recommended in metropolitan France.