Mosquitoes greater than double this summer time than in 2019

In case you had the impression of being bitten extra this summer time 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 include the appliance by a personal firm of an insecticide, deltametrine, came about this summer time in Gironde, and primarily within the Bordeaux metropolis. Earlier than the well being disaster, throughout the 2019 season, seven mosquito management operations had been carried out in Gironde, in keeping with information from Public Well being France. Throughout this summer time of 2022, greater than double has already taken place and the season isn’t over…

The applying is carried out inside a radius of 150 meters (the utmost flight vary of an grownup mosquito) across the space frequented by the contaminated individual. “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 have now by no means had an indigenous case in Gironde. »

Rebound after the well being disaster

The resumption of worldwide flights, specifically to the West Indies, after the top of measures linked to the Covid-19 well being disaster has inevitably marked the return in drive of imported circumstances of dengue fever. “Folks 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 explanation why, after an entomological investigation round these circumstances, localized insecticide therapies may be thought of.

These mosquito management operations solely goal grownup mosquitoes since they can’t transmit the illness to their eggs. Phew… “The objective is to keep away from a series of native contamination, factors out this ARS official. The effectiveness of the therapy is then monitored. The one technique to struggle towards the unfold of the tiger mosquito is to take away its breeding websites, by cleansing gutters, cups and every other 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, in a position to withstand the chilly to hatch within the spring.

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