allergy
Yes
Allergen
The abnormal sensitivity to any allergen, such as wasp venom, is called hypersensitivity.
allergen
true
The most common type of immediate hypersensitivity is type I hypersensitivity, also known as allergic reactions. This type of hypersensitivity involves the production of IgE antibodies in response to an allergen, which leads to the release of histamine and other mediators that cause symptoms such as itching, hives, and anaphylaxis.
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.
IgE is the immunoglobulin associated with hypersensitivity reactions, such as allergies. When an allergen triggers the production of IgE antibodies, it can lead to a rapid immune response that causes symptoms like hives, itching, and even anaphylaxis.
penicillin group of antibiotic or any allergen effect
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.
Hypersensitivity reactions are classified into four categories: Type I (immediate hypersensitivity), which involves IgE-mediated responses leading to allergic reactions; Type II (antibody-mediated cytotoxicity), where antibodies target specific cells; Type III (immune complex-mediated), characterized by the formation of antibody-antigen complexes that trigger inflammation; and Type IV (delayed-type hypersensitivity), which is mediated by T cells and manifests hours to days after exposure to the allergen. Each type involves distinct immune mechanisms and clinical manifestations.
This condition is known as an allergy, where the immune system overreacts to a harmless substance (allergen) as if it were a threat. Common allergic reactions include sneezing, itching, hives, and in severe cases, anaphylaxis. Treatment may involve avoiding the allergen, medication, or allergy shots to desensitize the immune system.