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Allergic rhinitis, of which the seasonal type is called hay fever, is a type of inflammation in the nose that occurs when the immune system overreacts to allergens in the air. [6] It is classified as a type I hypersensitivity reaction . [ 8 ]
Farmer's lung occurs because repeated exposure to antigens, found in the mold spores of hay, crops, and animal feed, triggers an allergic reaction within the farmer's immune system. [5] The defense mechanisms of the body present as cold and flu-like symptoms that occur in individuals who experience either acute or chronic reactions.
The allergic diseases—hay fever and asthma—have increased in the Western world over the past 2–3 decades. [141] Increases in allergic asthma and other atopic disorders in industrialized nations, it is estimated, began in the 1960s and 1970s, with further increases occurring during the 1980s and 1990s, [ 142 ] although some suggest that a ...
Hay fever season has returned with the first pollen bomb of the year set to drop on the UK. The Met Office issued its first ‘high’ pollen alert on Tuesday, which covers most of England and Wales .
Here's what to know about the unexpected symptoms allergies can bring up.
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It typically develops in adults with hay fever. [1] It is not usually serious. [2] OAS is the result of cross-reactivity between antigens of tree or weed pollen and antigens found in certain fruits and vegetables. Therefore, OAS is only seen in people with seasonal pollen allergies, and mostly people who are allergic to tree pollen. [3]
Alternaria is a genus of Deuteromycetes fungi. All species are known as major plant pathogens.They are also common allergens in humans, growing indoors and causing hay fever or hypersensitivity reactions that sometimes lead to asthma.