Tiger mosquito: increased surveillance from May 1st to November 30th


For several years, the tiger mosquito has been established and active throughout the Occitania region. Every year, health authorities, together with their partners, introduce a reinforced surveillance system to limit their colonization and prevent the risk of introducing viruses that they may be carriers of (dengue, chikungunia, zika).

Increased surveillance during tiger mosquito activity period
The enhanced surveillance system will be activated from May 1st to November 30th when the tiger mosquito is active. This system is based on 3 axes:
– Increased surveillance of mosquito populations (entomological surveillance).
– Awareness of people living in areas where these mosquitoes are present and active.
Controlling these mosquitoes and their larvae is one of the most important ways to avoid virus transmission. It is a reflex to appropriate at home to protect collectively.

> To learn more about the right reflexes

Increased medical surveillance of human cases of diseases that this mosquito can transmit: chikungunya, dengue and zika (epidemiological surveillance).

This surveillance mobilizes health workers across the region to promptly report any patient exhibiting symptoms of dengue, chikungunya or Zika to the regional health authority. In case of confirmation of a suspected case and after an entomological examination to prove the presence of tiger mosquitoes, insecticide treatment is organized in the places where the patient passes.

Travelers in tropical areas: be vigilant on the spot and on your return. If you have symptoms (sudden fever, joint pain, body aches and/or skin rashes, etc.) consult your doctor up to a week after your trip and tell him about your trip and where you are. In Occitania, the majority of reported cases (dengue fever) in 2020 concerned travelers returning from overseas departments and regions affected by a dengue epidemic.

Fewer cases in 2021 due to travel restrictions
In 2021, a very low number of cases were reported in Occitania due to the travel restrictions related to the COVID crisis. Despite the small number of imported cases, one native case (person who did not become infected while traveling) was confirmed.
In 2021
• 24 cases of imported arboviruses (travellers) were reported (128 in 2020).
• 1 indigenous case of dengue fever (person who contracted the disease without having traveled to a contaminated area) compared to 3 in 2020.
• These reports led to 17 investigations around the locations frequented by the cases (32 in 2020).
• 24 treatments near places frequented by infected people where the presence of the tiger mosquito has been confirmed, compared to 125 in 2020.

Presumably there will be more travel this year: vacationers, when you return, remember to continue your active protection by using effective repellents for 7 days after your return, and maintain your most unfavorable environment for tiger mosquito reproduction.

A strong presence of the tiger mosquito in Occitania
In Occitania, in 1964, the 4454 communes of the region (44%) are colonized, which corresponds to 88% of the regional population, ie almost 5.5 million inhabitants.

To find out if your city is colonized, go to the report page, click here!

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