The allergy season is getting longer and longer with more aggressive pollen

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serial sneeze, itchingAsthma attacks: Allergy sufferers are particularly affected this year as weather conditions favored the spread of high concentrations pollena trend that is expected to increase with the global warming.

In the last few weeks I have suffered much stronger attacks than in previous years at the same time “, tells AFP Élodie Germain, 43, living in Ile-de-France and allergic to pollen since thenyouth. So much so that this entrepreneur, who has just bought a country house in Normandy, was wondering if she would like to spend weekends there.

Once I was green it’s like a vague Pollen floods me “, she explains. She describes some symptoms disabilities, between a Nose constant runny, itchy skin all over the face, neck and gums and — novelty — ” a asthma nocturnal [l’]prevent sleep “. Clubs and allergy sufferers confirm receiving a large number of patient calls, although it is not possible to quantify the phenomenon.

A comparison with the two previous years is also difficult, according to Pascale Couratier, managing director of the French association prevention of allergies. ” In 2020 there were lockdowns, so people went out less. And last year, wearing a mask could protect against allergies ‘ she emphasizes.

No region spared from Red Alert

But one thing is certain this year: The symptoms were felt by many and very severely ‘ she summarizes. To self-medicate, allergists most often prescribe antihistamines, drops or some corticosteroidsand possibly long-term treatment of desensitization.

Allergy is a hypersensitivity reaction that is triggered by a specific immune response to a foreign substance called an allergen pollen Be part of.

The heat encourages pollination and the wind disperses the pollen grains in the air

In the course of the year, three major pollen seasons follow one another. First that the pollen oftrees (Olivier, sycamore, birch, oak, etc.). Then that the pollen of grasses which corresponds to the period of hay fever. That season ends with the pollen of herbaceous plants and ragweed. That diffusion this pollen depends on the weather conditions. That warmth promotes pollination wind distributes the pollen grains in theAir.

This year, the heat that set in early in the season contributed to the spread of a very large amount of grass pollen. According to the latest bulletin from the National Aerobiological Surveillance Network (RNSA), which monitors levels of biological particles in the air, all of France is still on alert for allergic risks.

Blame it on global warming

If the big allergies If things calm down after the end of June, longer and probably more intense allergy seasons can be expected in the coming years.

Questionable, global warming. ” In 30 years it has already been observed that the amounts of birch pollen have increased by more than 20%.”, told AFP Samuel Monnier, spokesman for the RNSA. With the warming of the earth’s surface, certain plants or trees are also conquering new territories. ” More and more ragweed, which are very allergenic plants, are moving north, also upwards ‘ remarks Mr. Monnier.

In France, according to the Ministry of Health, around 20% of children over the age of 9 and 30% of adults are now affected by pollen allergies. Experts warn that numbers will inevitably rise in the coming years. ” Global warming will result in longer pollen seasons, while pollution is making pollen more aggressive.”warns Isabelle Bossé, President of the Union of Allergists.

This is a real public health problemshe pleads. If we don’t live a severe allergy, we can not understand what it is. It has an enormous impact on the quality of life. »

Scientists have bad news for allergy sufferers

Article by Julia Kernpublished on March 26, 2022

If you live in the Mediterranean region you may have an itchy nose, Eyes continuous and uncontrollable sneezing for a few days. In the region are the Cupressaceae (sequoias, the cypress and juniper) come out of their hibernation and produce pollen in large quantities. Ash pollen fills the air in western France. The 2022 season started quite early, from mid-January, especially because of the mild temperatures at the beginning of the year. A trend that is likely to continue or even intensify with global warming.

The endless allergy season

Yingxao Zhang and Allison Steinerout Department of Climate and Space Sciences and Engineering from the University of Michigan, working on a computer simulation which predicts the intensity and which duration of emissions daily pollen between 2081 and 2100 – in a world where temperatures would have risen by 4 to 6°C. Your analysis covers only the United States and 13 taxa Plants responsible for 77% of respiratory allergies in the country. According to their results, the pollen season could be significantly longer, but also more intense than the one we are currently experiencing. Bad news for allergy sufferers!

The simulation shows that spring pollen could appear 10 to 40 days in advance, and that of summer andautumn take up to 15 additional days. In terms of the intensity of pollen emissions, all species botany analyzed here do not respond in the same way. For example the precipitation and temperature reduce daily pollen production by 33% in alder but increase that in oak by 50%.

Despite this, the overall increase in pollen emissions over a year is 16 to 40%. Who says more CO2 atmospheric, also says more pollen. It’s a sighting made by the scientific community for many years. If the CO concentrations2 Enter the researchers’ simulation, the peak of pollen production is 200% higher than that observed in recent years, still in the United States.

An important public health issue

Respiratory allergies due to pollen are a real public health concern. They affect 20 to 25% of French people, adults and children alike. In predisposed individuals, respiratory allergies, such as tobacco or pollution, can favor the onset asthma. This chronic disease is characterized byinflammation of bronchi the episodes of shortness of breath, dyspnea, Print chest and cough.

Almost 2,000 people die each year as a result of asthma, including 100 children, adolescents or young adults. Public Health France estimates that more than 60,000 people will be hospitalized an asthma attack each year. In the years to come, respiratory allergies are likely to be longer lasting and more severe, increasing the risk of complications.

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