According to the latest data from the National Agency for Public Health, since the beginning of July 2022, mainland France has recorded 41 original cases of dengue divided into five outbreaks. A balance sheet at risk of upward revision. The General Directorate of Health calls for caution and insists on mobilizing everyone to limit contamination.
This summer, France experienced a massive invasion of tiger mosquitoes, which is now raging in 67 metropolitan departments. The spread, especially due to the favorable climate, which worries the health authorities.
In addition to being a proven source of harassment,Aedes albopictus (the scientific name of the tiger mosquito) is probably also a carrier of several diseases, such as dengue fever, chikungunya or zika. “In this context, enhanced surveillance is implemented between May and November each year, which represents the period of vector activity,” explains the Directorate General of Health (DGS), which was contacted Dispatch. Fears that were quickly confirmed, especially in the south of France.
Dengue fever: how to explain the record number of cases detected in France since the beginning of 2022?
A record number
According to the latest data from the National Agency for Public Health, 41 indigenous cases of dengue have been recorded in mainland France since the beginning of July 2022, divided into five outbreaks.
Of the five departments affected by dengue fever, three are located in Occitania and two in Provence-Alpes-Côte d’Azur. An unprecedented number that exceeds the cumulative total of the past ten years. As a reminder, there have been nine localized episodes of dengue fever or chikungunya transmission in metropolitan France between 2010 and 2017.
And the concerns are twofold: the contamination only concerns people who “did not travel to an area where the virus circulates within 15 days before the onset of symptoms,” and dengue has broken out in several wards where it was never detected.
The observation that prompted the DGS, contacted by the paper La Dépêche, to sound the alarm: “Faced with an outbreak of autochthonous dengue, which demonstrates the circulation of the virus in the territory, the population should be informed of the risk and the preventive measures to be taken. save”.
As soon as the first symptoms (fever and joint pain) appear, the hygiene station recommends informing the Regional Health Authorities (ARS) through the mandatory reporting system. Serological and virological tests are thus available to diagnose cases.
“The aim is for ARS to be able to organize vector control actions in conjunction with mosquito control operators around cases: elimination of mosquitoes, potential disease vectors, field surveys to identify additional cases, etc.,” DGS continues.
Indigenous dengue cases near Toulouse: “We must act quickly to avoid contamination”
But in the context of climate and environmental change and the globalization of trade, the balance is likely to advance rapidly. This Wednesday, September 21, a new case was detected in Montauban in Tarn-et-Garonne. “Authorities at the national and regional level are fully mobilized to respond to this risk,” the deposit insurance system tries to reassure.
Physical measures to eliminate mosquitoes by acting on their breeding sites (elimination of breeding sites), chemical mosquito control processes around cases to reduce the risk of contamination, communication and social mobilization… DGS is on a war footing. On the other hand, “limiting the number of cases of infection still remains everyone’s business, by individually taking the right preventive measures”, he wants to specify.
The health authority therefore insists on the necessity of adoption good gestures (restrict favorable larval breeding sites, avoid bites using mosquito nets or skin covering, etc.) to limit contamination.
“Patients must absolutely isolate themselves from mosquitoes during the viremia phase, which lasts about ten days,” he recalls. It is advisable to wear covering and loose clothing, use repellent, install mosquito nets on openings (doors and windows) and use electric diffusers inside the dwelling.