As at the end of summer, ragweed pollens have returned to the Auvergne-Rhône-Alpes region, causing rhinitis, conjunctivitis or asthma.
Each year, as the summer holidays come to an end, they are back in the south-east of France and spoil our last days of good weather: ragweed pollens, a very allergenic plant so the peaks of pollinations cause many allergies.
At the beginning of September, five departments are particularly concerned: Yonne, Nièvre, Rhône, Ardèche and Drôme. Two departments close to them display a high risk of allergies: they are Ain and Isère. Given the very high concentrations found in these departments, the National Network for Aerobiological Surveillance (RNSA) has triggered the red ambrosia alert in its bulletin dated 31 August and valid until 7 September.
"The risk of allergies associated with ragweed will be greatest in the Rhone Valley from Lyon to Montélimar," says the RNSA in its newsletter. It is high in the Ain and Isère, while "the risk of allergies will be average in the surrounding areas such as the Loire, Allier, Vaucluse, Gard and Saone-et-Loire," continues the RNSA in its newsletter.
Pollens very travelers
Well known to allergists and national health agencies, ragweed is a weed that sometimes triggers severe allergic attacks, causing rhinitis, as well as asthma, conjunctivitis, urticaria and eczema.
The ambrosia is the subject of two decrees published in the Official Journal and aimed at limiting its proliferation. It is all the more harmful because its pollens do not just inconvenience the inhabitants of the areas on which it grows. "With the wind, ragweed pollens can travel for hundreds of kilometers as for example to Aix-en-Provence and Marseille in case of north wind as it was the case last week. the quantities present could hinder people coming from an infestation zone and already sensitized, "fears the RNSA.
And unfortunately, good weather is the ally of ambrosia, since it promotes the migration of its pollens to non-infested areas. "As long as the sun is present, these pollens will invade the main areas of infestation and will spread to all adjacent territories," says the RNSA.
To guard against the adverse effects of ragweed pollen, it is recommended to sensitive people to "scrupulously follow the treatments prescribed by their medicine and to remain very vigilant".
How to protect yourself from ragweed pollens?
If, like 13% of the inhabitants of the Rhône-Alpes region, you are sensitive to ambrosia, here are some advices delivered by Dr. André Segyo, allergist to Nevers, to protect you from allergy. Questioned by the Journal of the Center, he advises to wear sunglasses outside and to avoid as much as possible to rub his eyes in case of itching: it is better to apply eye drops. The specialist also recommends driving in closed windows, not drying clothes outside or washing your hair in the evening before going to sleep. Finally, it advises against practicing outdoor sports activities during the pollen alert.