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Ragweed pollen is a common allergen. A single plant may produce about a billion grains of pollen per season, [ 11 ] [ 12 ] and the pollen is transported on the wind. It causes about half of all cases of pollen-associated allergic rhinitis in North America, where ragweeds are most abundant and diverse. [ 8 ]
A 2014 study published in Clinical and Translational Allergy specifically examined adults whose seasonal allergies included birch pollen; they were found to have marked inflammation in the ...
A pollen count is a measurement of the number of pollen grains in a given volume of air. Pollen counts, and forecasts of pollen conditions, are routinely produced and reported to the public because high aerial pollen concentration is associated with increased rates of allergic reaction for those with conditions such as hay fever and asthma .
[2] [9] Some people may develop symptoms only during specific times of the year, often as a result of pollen exposure. [3] Many people with allergic rhinitis also have asthma, allergic conjunctivitis, or atopic dermatitis. [2] Allergic rhinitis is typically triggered by environmental allergens such as pollen, pet hair, dust, or mold. [3]
The latest forecast for the Sacramento area calls for high pollen levels, according to the Weather Channel. Tuesday’s pollen count is expected to be high, the forecast said.
Mar. 20—Tuesday marked the Spring equinox and, as we all know, spring means allergy season. According to data from the CDC, almost a quarter of adults, and roughly 18% of children in the U.S ...
Ambrosia trifida, the giant ragweed, is a species of flowering plant in the family Asteraceae. It is native to North America , where it is widespread in Canada , the United States , and northern Mexico .
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