Mosquitoes greater than double this summer season than in 2019

Mosquitoes greater than double this summer season than in 2019

When you had the impression of being bitten extra this summer season in Gironde, it isn’t only a figment of the creativeness. The tiger mosquito has additional strengthened its presence on this division, in order that 84% of its inhabitants lives in a contaminated space. In New Aquitaine, solely the Creuse nonetheless resists the invader. The presence of the tiger mosquito has not but been detected there.

Twice as many operations as in 2019

About fifteen mosquito management operations, which encompass the appliance by a non-public firm of an insecticide, deltametrine, came about this summer season in Gironde, and primarily within the Bordeaux metropolis. Earlier than the well being disaster, in the course of the 2019 season, seven mosquito management operations had been carried out in Gironde, in keeping with knowledge from Public Well being France. Throughout this summer season of 2022, greater than double has already taken place and the season shouldn’t be over…

The appliance is carried out inside a radius of 150 meters (the utmost flight vary of an grownup mosquito) across the space frequented by the contaminated particular person. “All of the therapies utilized in Gironde are linked to imported circumstances of viremic arboviruses (dengue, zika, chikungunya), underlines Fabienne Jouanthoua, head of the environmental well being heart of the Gironde delegation of the regional well being company. We’ve got by no means had an indigenous case in Gironde. »

Rebound after the well being disaster

The resumption of worldwide flights, particularly to the West Indies, after the tip of measures linked to the Covid-19 well being disaster has inevitably marked the return in pressure of imported circumstances of dengue fever. “Individuals come again sick from journey, they’ve chickunguna, dengue fever or Zika and they’re viraemic”, explains Fabienne Jouanthoua. Clearly, they could be a vector for spreading the virus if they’re bitten by a tiger mosquito. That is the rationale why, after an entomological investigation round these circumstances, localized insecticide therapies might be thought-about.

These mosquito management operations solely goal grownup mosquitoes since they can’t transmit the illness to their eggs. Phew… “The aim is to keep away from a series of native contamination, factors out this ARS official. The effectiveness of the remedy is then monitored. The one technique to combat in opposition to the unfold of the tiger mosquito is to take away its breeding websites, by cleansing gutters, cups and another receptacle with stagnant water. We should additionally take into consideration these cleansing operations on the finish of winter as a result of mosquitoes lay diapausing eggs, that’s to say, ready to withstand the chilly to hatch within the spring.

If we’re nonetheless on the finish of the season now, the pest will stay beneath surveillance till the tip of November in Gironde.

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