enhanced surveillance in mainland France

enhanced surveillance in mainland France

Practically 40 autochthonous circumstances of dengue fever have been detected in mainland France since July 2022. Proof of the strengthening of the presence of the tiger mosquito in a lot of departments, but additionally of the curiosity of bolstered surveillance by the general public well being authorities. Explanations.

Dengue fever, a illness underneath shut surveillance in France

Dengue fever is a viral illness, transmitted within the overwhelming majority of circumstances when bitten by a tiger mosquito. In additional than half of circumstances, dengue causes no signs, however in 10% of circumstances it will probably 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 ceaselessly in kids, and through a second an infection with the virus.

A bolstered monitoring system underneath 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 sort of machine as for the Zika virus and chikungunya. In any other case, Public Well being France is expounded to the Regional Well being Companies (ARS). Collectively they acquire dengue fever knowledge within the metropolitan departments between 1is Might 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 ailments on the territory of metropolitan France. In a second step, it’s obligatory to advertise an early prognosis of circumstances of dengue fever. The goal is to optimize care and forestall critical problems.

Practically 40 indigenous circumstances in the summertime of 2022

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

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

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

Estelle B., Physician of Pharmacy


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

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