allergy treatment peanut 1 articles:
Children with seasonal allergic rhinitis have been sensitized to outdoor allergens, such as tree pollens, grasses and weeds. Others have perennial rhinitis, with year-round symptoms caused by indoor allergens such as pets, mold and house dust mites. Some children have both types of rhinitis.
allergy treatment peanut 2 articles:
What is a skin test? How does it work? A skin test detects the presence of antibodies to a particular allergen, a substance that causes an allergic reaction. A positive test suggests that you may have an allergy to the particular substance. However, your doctor will review your skin-test results, your medical history and conduct a physical exam to confirm which allergens are causing your symptoms. A skin test is performed by first placing a drop of allergen extract on the skin, then the skin is pricked with a needle. If you have a positive reaction to the extract, a red welt will appear on your skin in about 15 minutes. The size of the welt may indicate the strength of the reaction. If you do not react to the extract you are most likely not allergic to the substance.
allergy treatment peanut 3 articles:
An allergen such as mold spores or pollen enters the body through the mouth or nose or lands on the skin. Special white blood cells (T-cells) recognize the allergen as foreign and release chemicals in response. These chemicals travel through the blood and instruct another kind of white blood cell (B-cells) to produce IgE antibodies. Some of these antibodies attach to the outside of another special type of white blood cell called a mast cell. Mast cells are scattered throughout the skin and respiratory tract and their purpose is to help mediate the inflammatory response of the immune system. IgE antibodies can remain attached to mast cells for many years.
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