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Studies have shown that climate change has been partly responsible for longer growing seasons and larger pollen loads, leading to speculation of an increase in sensitizations to environmental allergens. A new study being presented at this year’s American College of Allergy, Asthma and Immunology (ACAAI) Annual Scientific Meeting followed 5874 kids with asthma in Los Angeles for 15 years and found no increase in allergic sensitizations. When your immune system becomes sensitized to an allergen (an otherwise harmless substance), seattle drugstores you will likely develop symptoms of an allergy each time you are exposed to that same allergen.

“We were somewhat surprised at the results as we expected there would be an increase in the number of kids with asthma who were sensitized to pollen and other allergens,” said Kenny Kwong MD, principal investigator of the study. “Between 80-90% of children with asthma have allergy triggers, which is why it’s important for children with asthma to be tested for allergies. Allergy triggers can cause asthma flares in children.”

A total of 123,209 tests were performed on the more than 5,000 patients. All patients received skin prick tests to dust mites, cat, dog, cockroach, tree pollen, grass pollen, and weed pollen. In addition, all patients had been diagnosed with asthma and allergic rhinitis by an asthma specialist using history, physical examination, and spirometry when age appropriate.

“Although temperatures have been rising and pollen loads increasing, if someone is not genetically predisposed to allergies, they are not likely to be sensitized to more allergens,” said allergist Lyne Scott, MD, ACAAI member and co-author of the study. “The growing season is year-round in LA and people with allergies who are already sensitized to pollens suffer more intensely when the growing season is longer, or the air quality isn’t good. It is important to remember that sensitization does not equate to severity so those with allergies may have worse symptoms.”

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