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The immune system sees the pollen as a danger and releases antibodies that attack the allergens. That leads to the release of histamines into the blood. Histamines trigger runny noses, itchy eyes ...
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 ...
Also, tree pollen season tends to end around May. Allergies are the result of immune system reactions to allergens. When a person encounters something they are allergic to, different chemicals ...
For example, people allergic to birch pollen may also find that they have an allergic reaction to the skin of apples or potatoes. [23] A clear sign of this is the occurrence of an itchy throat after eating an apple or sneezing when peeling potatoes or apples. This occurs because of similarities in the proteins of the pollen and the food. [24]
This differs from class 1 food allergy where sensitisation to the protein occurs in the GI tract, and is produced as a result of exposure to the food itself. [5] OAS can occur any time of the year, but is most prevalent during the pollen season. Individuals with OAS usually develop symptoms within minutes of eating the food. [6]
Pollination is the transfer of pollen from an anther of a plant to the stigma of a plant, later enabling fertilisation and the production of seeds. [1] Pollinating agents can be animals such as insects, for example beetles or butterflies; birds, and bats; water; wind; and even plants themselves.
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The plant attracts these insects by producing a scent that mimics the scent of the female bee. In addition, the lip acts as a decoy, as the male bee confuses it with a female that is visiting a pink flower. Pollen transfer occurs during the ensuing pseudocopulation. [19]