What is allergen?

An allergen is a substance that can cause an allergic reaction. Allergens are substances that, in some people, the immune system recognizes as "foreign" or "dangerous" but cause no response for most people.

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The allergenic extract in this vial is referred to as a "bulk" extract or stock concentrate since it is designed primarily for the physician equipped to prepare dilutions and mixtures as required. The extract is sterile and intended for subcutaneous injection for immunotherapy and scratch, prick or puncture for diagnosis. Unless specified otherwise, the concentration of extract supplied will in most cases be expressed in weight to volume (e.g., 1:10 or 1:20 w/v) and will be the strongest available. Where mixtures of pollens and non-pollens have been ordered, the mixed extract will be treated as a pollen mixture. To insure maximum potency for the entire dating period, all bulk concentrates will contain 50% volume to volume (v/v) glycerin unless otherwise requested. Dilutions will also be prepared with 50% (v/v) glycerin unless another diluent is specified. Source materials utilized in allergenic extract products include pollens, molds, animal epidermals, insects, foods and environmental materials. Pollens are collected using techniques such as waterset or vacuuming, cleaned and purified to greater than 99% single specie pollen (less than 1% foreign particle presence). Molds are typically grown on synthetic nutrient medias and are derived from the surface growth (mycelia). Animal source materials are collected from animals deemed to be healthy at the time of collection by a veterinarian or individual trained and certified by a veterinarian. Epidermals include feathers, hair and dander, or the whole epidermal (pelt) as described on product labeling. Regular process epidermals are extractions of the source material without additional processing, except that certain materials are defatted. AP (acetone precipitated) epidermal source materials are derived from the precipitate formed when acetone is added to an aqueous extract. The resulting precipitate is dried, and becomes the source material for the AP product. Insects are collected in whole body form....


Allergen-specific IgE antibody test

To screen for allergies, sometimes to monitor the effectiveness of immunotherapy (desensitization) treatment


Indoor Allergens

Most people with asthma or hay fever or other outdoor allergies think of their home as a haven where they can escape their allergies. Unfortunately, houses and apartment buildings harbor their own allergens (agents that cause allergy symptoms). The inside of your home actually traps allergens, making them impossible to avoid. Although many allergens in your environment can trigger allergic symptoms, house dust is the main culprit in indoor allergies. What is house dust It varies depending on the type and age of your home, the temperature and humidity in the home, what you keep in the home (everything from food to clothes to furniture), and who lives in the home (human, pet animal, and plant).Some dust is present in every home, regardless of how often or how thoroughly the house is cleaned. House dust is an airborne mixture that might contain fine particles of soil and plant material from indoors or outdoors, particles of human and animal skin (dander) and hair, fabric fibers, mold spores, dust mites, fragments of insects that have died and their waste, food particles, and other debris.Although many substances in dust can trigger allergic symptoms, the most important indoor allergens are dust mites, pet dander, cockroaches, and molds. Unlike seasonal allergies such as hay fever, indoor allergies may last all year long. Indoor allergens may provoke or worsen asthma symptoms, depending on a person's unique sensitivities.Indoor allergies tend to be at their worst in the late summer, when dust mites are at their peaks.Allergy symptoms can actually be worse in the winter when the windows are closed and people are shut in with the allergens. Keeping your windows open at night during seasons of high outdoor pollen and mold count may worsen your allergy symptoms or asthma because these high-concentration outdoor allergens are allowed into your house to settle.If you are sensitive to indoor allergens, you will continue to have symptoms as long as you are exposed to your allergens. Sensitivity to indoor allergens is very common and occurs at every age. It is less common in children younger than 5 years. People most likely to experience allergic rhinitis are those in early school and early adult years.

Allergen - Wikipedia, the free encyclopedia

An allergen is any substance that can cause an allergy. Technically, an allergen is a non-parasitic antigen capable of stimulating a type-I hypersensitivity ...


Allergen definition - Medical Dictionary definitions of popular ...

Mar 18, 2011 ... Allergen: A substance that is foreign to the body and can cause an allergic reaction in certain people. For examples, pollen, dander, mold. ...


Food Allergens

Jun 18, 2009 ... Strict avoidance of food allergens — and early recognition and management of allergic reactions to food — are important measures to prevent ...


Tips to Remember: Indoor allergens - AAAAI

Millions of people suffer from allergy symptoms caused by indoor allergens, such as house dust mite droppings, animal dander, cockroach droppings and molds. ...


Word! Allergen

An allergen is a medical word for anything that causes an allergic reaction.


Food allergies: Food labels list top 8 allergens -

Food allergies — Here's how to read food labels to avoid an allergic reaction.


Get the Facts: New Food Allergen Labeling Laws

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Common allergens include...