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allergens are foreign proteins that trigger an immune reaction. This includes allergens to the antigens. The immune system recognizes the antigens and subsequently forms antibodies to fight the supposed, harmful foreign substances. In most cases, allergens are safe for the body. Nevertheless, if the immune system reacts again and again in case of renewed contact with the allergen, it is called an allergy. With the so-called prick test, the dermatologist can determine which allergens the subject reacts to with an immune reaction. The most common allergens include plant pollen (see also pollen calendar).

Overview of allergens:

Allergens can do one thing in different ways Immune reaction trigger. It is not always necessary to have an intake of the allergens, such as inhalation. For contact allergens, a brief contact with the appropriate allergen is sufficient to cause an immune response.
Incidentally, the picture shows a herbal polle in the close-up. It is easy to see their surface structure, which can be identified by the antibodies.
Below are some allergens:

skin contact
(Contact allergens)
Pet hair, latex, cosmetics, heavy metals
Tree pollen, grass pollen, mold, house dust mite excrement
(injection allergens)
Bee stings, poisonous plants, mosquito bites, wasp stings, penicillin, contrast agents
(Food allergens)
Medicinal products, Eggs, Fish, Spices, Animal milk, Soya, Nuts, Shellfish, Wheat (Gluten)