Fight against the tiger mosquito: let’s adopt good practices

The tiger mosquito, an invasive species native to Southeast Asia, has gradually established itself in France since 2004, posing a serious public health problem. Since 2012, it has gradually established itself in 5 departments in the Rhône-Alpes region, including Savoie. Capable of transmitting serious infectious diseases such as dengue, zika and chikungunya, this mosquito has adapted to temperate climates, now affecting 74% of inhabitants of the Auvergne-Rhône-Alpes region.

We can all act through simple actions to fight against its expansion and protect the population.

Monitoring and intervention

Since January 1, 2020, the Regional Health Agencies (ARS) have been responsible for surveillance and interventions around suspected cases of dengue, chikungunya or zika. This measure aims to prevent epidemics of vector-borne diseases by quickly identifying and neutralizing potential outbreaks.

Prevention: the right actions

For effectively combat the proliferation of the tiger mosquito, the participation of all is essential. Female mosquitoes, the only ones that bite to reproduce, look for stagnant water points to lay their eggs. Cups, planters, vases, gutters are all places conducive to their development. The following simple actions can help reduce their habitat:

  • Eliminate objects where water can stagnate (green waste, tires, bulky items).

  • Empty containers containing water regularly (watering cans, saucers).

  • Change the water of plants and flowers weekly.

  • Check the gutters for proper flow.

  • Cover out-of-use water tanks and swimming pools.

Preventive control and intervention measures

The tiger mosquitoes present do not naturally carry viruses but can transmit them after biting an infected person. Their range of action being very short (less than 100 meters), prevention is based on the systematic elimination of larval breeding sites around homes. Regular monitoring of these water points is crucial.

The fight against adult mosquitoes via insecticide spraying is reserved for areas where cases of the virus have been detected or in the event of an epidemic. The rational use of insecticides is essential to avoid the development of resistance in mosquitoes, a phenomenon that worsens with excessive and systematic use. In addition, these interventions have a temporary effect and do not eliminate larval breeding sites.

A global problem

Increased international trade and commerce has facilitated the spread of the tiger mosquito, now found in many parts of the world. Its ability to adapt to varied climates, including cold winters, makes it a global threat.

In the Auvergne-Rhône-Alpes region, the tiger mosquito has colonized 1,070 municipalities, including 261 new ones in 2023. Faced with this expansion, vigilance and preventive actions remain the most effective weapons to protect the population against this vector of serious diseases. .

Map of France affected by the tiger mosquito in 2024



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