Allergic Reactions

Allergic Reactions

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Antigen and Antibody

What are

Simply and didactically, we can describe the allergic reaction as an exaggerated response of the body to a certain antigen (allergen).

Key information, types and characteristics

Among the most common allergens are foodstuffs such as peanuts, milk, eggs, some seafood such as crustaceans, gluten, among others. There are also those present in antibiotics (penicillin, tetracycline), some vaccines, poisons (bee, wasp, snake), chemicals, etc.

A person who has an allergy is overly reactive to a substance that is generally well tolerated by most people.

All allergic reactions cause some kind of tissue damage. Most of these reactions occur within minutes of exposure to an allergen. For example, an individual with allergic rhinitis will have an exacerbated or aggravated condition within minutes of exposure to environments with accumulation of dust, pollution, fungus, etc.

In addition to the immediate reactions mentioned above, there are also those known as: Late hypersensitivity reactions. These are so-called because they usually manifest within 12 to 72 hours of exposure to an allergen.