enhanced surveillance in mainland France

enhanced surveillance in mainland France

Almost 40 autochthonous instances of dengue fever have been detected in mainland France since July 2022. Proof of the strengthening of the presence of the tiger mosquito in numerous departments, but additionally of the curiosity of strengthened surveillance by the general public well being authorities. Explanations.

a mosquito carrying dengue fever

Dengue fever, a illness below shut surveillance in France

Dengue fever is a viral illness, transmitted within the overwhelming majority of instances when bitten by a tiger mosquito. In additional than half of instances, dengue causes no signs, however in 10% of instances it may well result in:

  • A fever above 38.5°C;
  • Unexplained fatigue;
  • Complications ;
  • Nausea and vomiting;
  • muscle and joint ache;
  • In addition to a rash, not systematic.

Exceptionally, symptomatic types of dengue can progress to a extreme, probably deadly type in 24 to 48 hours.. This complication happens extra often in youngsters, and through a second an infection with the virus.

A strengthened monitoring system below the aegis of Santé Publique France

The existence of extreme types of dengue fever and the arrival of the tiger mosquito on metropolitan territory in recent times has justified the implementation of enhanced monitoring. That is Public Well being France who ensures and coordinates this surveillance. This is identical kind of gadget as for the Zika virus and chikungunya. In any other case, Public Well being France is said to the Regional Well being Businesses (ARS). Collectively they gather dengue fever knowledge within the metropolitan departments between 1is Could and November 30 annually. The aim of this monitoring is twofold. Step one is to gather epidemiological knowledge on the evolution of the tiger mosquito and related vector-borne illnesses on the territory of metropolitan France. In a second step, it’s obligatory to advertise an early prognosis of instances of dengue fever. The goal is to optimize care and stop severe problems.

Almost 40 indigenous instances in the summertime of 2022

On this 12 months 2022, between 1is Could and September 9, Public Well being France recognized 165 imported instances of dengue feverof which 156 had been identified in departments the place the tiger mosquito is documented. On the identical time, they recognized indigenous instances :

  • Within the Japanese Pyrenees, just one case;
  • Within the Hautes Pyrénées, an outbreak of 4 instances between mid-July and the tip of August;
  • In Haute-Garonne, one other focus of 4 instances having affected the identical household on the finish of August;
  • Within the Var, an outbreak of 6 instances declared in the beginning of the summer time;
  • In addition to within the Alpes Maritimes, with an outbreak of 21 instances recognized on the finish of summer time.

The identification of those foci systematically results in epidemiological and entomological analysis. A prognosis of relations could be put in place, whereas mosquito management actions could be launched to cease the event of transmission. Whereas the tiger mosquito is now established within the majority of metropolitan departments, monitoring dengue fever instances is a important technique of combating vector-borne illnesses transmitted by mosquitoes.

Estelle B., Physician of Pharmacy


– Chikungunya, dengue and zika – Information from enhanced surveillance in metropolitan France in 2022. www.santepubliquefrance.fr. Accessed September 16, 2022.

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