Type of antigen that produces an abnormally vigorous immune response
This article is about the antigen. For the Irish-registered pharmaceutical company, see Allergan.
An allergen is a type of antigen that produces an abnormally vigorous immune response in which the immune system fights off a perceived threat that would otherwise be harmless to the body. Such reactions are called allergies.
In technical terms, an allergen is an antigen that is capable of stimulating a type-I hypersensitivity reaction in atopic individuals through immunoglobulin E (IgE) responses.[1] Most humans mount significant Immunoglobulin E responses only as a defense against parasitic infections. However, some individuals may respond to many common environmental antigens. This hereditary predisposition is called atopy. In atopic individuals, non-parasitic antigens stimulate inappropriate IgE production, leading to type I hypersensitivity.[citation needed]
Sensitivities vary widely from one person (or from one animal) to another. A very broad range of substances can be allergens to sensitive individuals.
^Goldsby, Richard A.; et al. Immunology (5th ed.). New York: W.H. Freeman.
An allergen is a type of antigen that produces an abnormally vigorous immune response in which the immune system fights off a perceived threat that would...
Allergen immunotherapy, also known as desensitization or hypo-sensitization, is a medical treatment for environmental allergies, such as insect bites,...
exposure of children to potential allergens may be protective. Treatments for allergies include avoidance of known allergens and the use of medications such...
allergies experienced by humans. Among the eight known cat allergens, the most prominent allergen is secretoglobin Fel d 1, which is produced in the anal...
This is a list of allergies, which includes the allergen, potential reactions, and a brief description of the cause where applicable. Many substances can...
exposure to a given food allergen. Food allergens account for about 90% of all allergic reactions. The most common food allergens include milk, eggs, peanuts...
The Food Allergen Labeling and Consumer Protection Act (FALCPA) is a United States law that requires all food labels in the United States to list ingredients...
inflammation in the nose that occurs when the immune system overreacts to allergens in the air. Signs and symptoms include a runny or stuffy nose, sneezing...
Allergen of the Year is an annual "award" voted upon by the American Contact Dermatitis Society. The purpose of the award is "to draw attention to the...
Allergen immunotherapy (AIT, also known as desensitization or hypo-sensitization) is a treatment involved in administering the doses of allergens to...
very uncomfortable. Contact dermatitis results from either exposure to allergens (allergic contact dermatitis), or irritants (irritant contact dermatitis)...
based on the presenting symptoms and signs after exposure to a potential allergen or irritant and in some cases, reaction to physical exercise. The primary...
rash or skin lesion at the site of exposure. Depending on the type of allergen causing it, the rash can ooze, drain or crust and it can become raw, scaled...
Peanut (Arachis hypogaea) Allergen Powder, sold under the brand name Palforzia, is an oral medication for the treatment of allergic reactions, including...
substances.[citation needed] The two most commonly used methods of confirming allergen sensitization are skin testing and allergy blood testing. Both methods...
saliva and by the sebaceous glands located in their skin. It is the primary allergen present on cats and kittens. The function of the protein for cats is unknown...
I allergen is a family of protein allergens. Allergies are hypersensitivity reactions of the immune system to specific substances called allergens (such...
subjects produced less Fel d 1 (the strongest among the eight known Fel d 1 allergens produced in cat saliva, therefore, is deposited on their fur when they...
Detectable dust mite allergen was found in the beds of about 84% of surveyed United States homes. In Europe, detectable Der p 1 or Der f 1 allergen was found in...
FITkit is an immunological test for measuring natural rubber latex (NRL) allergens from a variety of rubber products, such as gloves. FITkit is a method...
causing a delayed-type allergic reaction in a patient and may identify allergens not identified by blood testing or skin prick testing. It is intended...
prominent allergen researchers have determined that there is no basis to the claims that certain breeds are hypoallergenic and, while allergen levels vary...
proteins (Ara h 8). Among these peanut allergens, Ara h 1, Ara h 2, Ara h 3 and Ara h 6 are considered to be major allergens which means that they trigger an...
membrane covering the white part of the eye) due to allergy. Although allergens differ among patients, the most common cause is hay fever. Symptoms consist...
for metals as it does for some other allergens. Prevention and treatment consists of avoiding the metal allergen; there is no other treatment, as of 2021[update]...
nose resulted. In a research article by Perry, et al. (2004), no peanut allergen was detected in the air after subjects consumed peanut butter, shelled...
child's allergy is an immune system reaction to a foreign substance, or allergen, that is considered harmless to most. According to Dr. James Fernandez...
rhinitis. Up to 80% of people with atopic dermatitis have elevated total or allergen-specific IgE levels. About 30% of people with atopic dermatitis have mutations...