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What causes immediate hypersensitivity reactions?
Inhaled or ingested allergens usually cause immediate hypersensitivity reactions.
What is the medical term for a substance that produces hypersensitivity?
The medical term for a substance that produces hypersensitivity is an allergen. Allergens can trigger allergic reactions in individuals who are sensitive to them, leading to symptoms such as sneezing, itching, and hives.
What is an atopy?
An atopy is a hereditary disorder marked by the tendency to develop localized immediate hypersensitivity reactions to allergens.
What are delayed hypersensitivities?
Delayed hypersensitivity reactions-- Allergic reactions mediated by T cells that occur hours to days after exposure
What is dermal hypersensitivity reaction?
Dermal hypersensitivity reaction is an exaggerated immune response in the skin to certain substances or allergens. This reaction can lead to symptoms such as redness, itching, swelling, and rash at the site of contact with the allergen. Common causes include contact dermatitis, eczema, or allergic reactions to chemicals, plants, or certain metals.
What causes delayed hypersensitivity reactions?
Delayed hypersensitivity reactions, also known as type IV hypersensitivity reactions, are caused by T cells recognizing antigens and triggering an immune response. This can happen hours to days after exposure to the antigen. Common triggers include certain drugs, metals, and infectious agents.
What are common allagens?
Common allergens are substances that cause allergic reactions in people who are sensitive to them. Pollen and pet dander are common allergens.
Do GMO foods cause allergic reactions?
There is concern that the process used to genetically modify plants can cause unintentional changes that result in new allergens, which might result in allergic reactions, but whether new allergens have resulted from genetic enginnering is not known.
Which classes of hypersensitivity are modulated by B-cells?
B-cells primarily modulate hypersensitivity types I, II, and III. In type I hypersensitivity, B-cells produce IgE antibodies in response to allergens, leading to allergic reactions. In type II, B-cells generate IgG or IgM antibodies that target specific cell surfaces, resulting in cytotoxic effects. Type III hypersensitivity involves the formation of immune complexes by B-cell-produced antibodies, which can deposit in tissues and trigger inflammation.
What is the name for the familial inclination to have hypersensitivity to certain allergens?
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What is the same as hypersensitivity?
Hypersensitivity is also known as allergic reaction, exaggerated immune response, or allergic sensitivity.
What defends the body from allergic reactions?
The simple answer is nothing. Allergic reactions are caused by your own immune system attacking itself. Since your immune system is your bodies defense against pathogens, and foreign objects an allergic reaction is a type of autoimmune disorder.
