Allergen

allergensallergenicantiallergiccontact allergenseasonal allergiesallergenicityaeroallergensallergenic extractsallergiesallergin
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.wikipedia
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Allergy

allergiesallergicallergic reaction
Such reactions are called allergies.
Common allergens include pollen and certain food.

Type I hypersensitivity

Type Irespiratory hypersensitivitytype-I hypersensitivity
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.
Type I hypersensitivity (or immediate hypersensitivity) is an allergic reaction provoked by reexposure to a specific type of antigen referred to as an allergen.

Atopy

atopicatopic disordersatopic diseases
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.
Atopy may have a hereditary component, although contact with the allergen or irritant must occur before the hypersensitivity reaction can develop.

Anaphylaxis

anaphylactic shockanaphylacticanaphylactic reaction
An extremely serious form of an allergic reaction is called anaphylaxis.
Diagnosis is based on the presenting symptoms and signs after exposure to a potential allergen.

Antigen

antigensantigenicantigenic proteins
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.
Allergen – A substance capable of causing an allergic reaction. The (detrimental) reaction may result after exposure via ingestion, inhalation, injection, or contact with skin.

Fel d 1

cat allergen
Fel d 1 (Allergy to cats)
Fel d 1, produced largely in cat saliva and sebaceous glands, is the primary allergen present on cats and kittens.

Wheat allergy

Wheatallergic to wheatbaker's asthma
wheat
Twenty-seven potential wheat allergens have been successfully identified.

Patch test

patch testingskin patch test48-h patch test
Top 5 allergens discovered in patch tests in 2005–06:
When skin is exposed to an allergen, the antigen-presenting cells (APCs) – also known as Langerhans cell or Dermal Dendritic Cell – phagocytize the substance, break it down to smaller components and present them on their surface bound major histocompatibility complex type two (MHC-II) molecules.

Immunoglobulin E

IgEImmunoglobulin E (IgE)immunoglobulin epsilon-chains
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.
IgE that can specifically recognise an allergen (typically this is a protein, such as dust mite Der p 1, cat Fel d 1, grass or ragweed pollen, etc.) has a unique long-lived interaction with its high-affinity receptor FcεRI so that basophils and mast cells, capable of mediating inflammatory reactions, become "primed", ready to release chemicals like histamine, leukotrienes, and certain interleukins.

Fire ant

Solenopsisfire antsred ant
Other common causes of serious allergy are wasp, fire ant and bee stings, penicillin, and latex.
It has been demonstrated that, whilst pustule formation results from the injected venom alkaloids, allergy to fire ant stings is caused solely by venom allergenic proteins.

Celery

celery seedApium graveolens'' var. ''dulceCelery juice
celery and celeriac
The allergen does not appear to be destroyed at cooking temperatures.

Ragweed

AmbrosiaAmbrosia'' (plant)bur-sage
weeds — ragweed, plantago, nettle, Artemisia vulgaris, Chenopodium album, sorrel
Ragweed pollen is a common allergen.

Allergic rhinitis

hay feverhay-feverhayfever
Plant pollens (hay fever) Symptoms include rhinitis, which causes sneezing and a runny nose, as well as allergic conjunctivitis, which includes watering and itchy eyes.
Allergic rhinitis, also known as hay fever, is a type of inflammation in the nose which occurs when the immune system overreacts to allergens in the air.

Allergic conjunctivitis

red eyesallergic rhinoconjunctivitisconjunctivitis, allergic
Symptoms include rhinitis, which causes sneezing and a runny nose, as well as allergic conjunctivitis, which includes watering and itchy eyes.
Although allergens differ among patients, the most common cause is hay fever.

Cladosporium

Cladosporium fulvum
Pleurotus ostreatus, cladosporium, and Calvatia cyathiformis are significant airborne spores.
The airborne spores of Cladosporium species are significant allergens, and in large amounts they can severely affect asthmatics and people with respiratory diseases.

Alternaria

Alternaria leaf spot
Other significant fungal allergens include aspergillus and alternaria-penicillin families.
They are also common allergens in humans, growing indoors and causing hay fever or hypersensitivity reactions that sometimes lead to asthma.

Dermatitis

eczemaallergic dermatitischronic eczema
Some fungal air-borne allergens such as Coprinus comatus are associated with worsening of eczematous skin lesions.
Allergic contact dermatitis occurs upon exposure to an allergen, causing a hypersensitivity reaction in the skin.

Almond

almondsbitter almondalmond oil
almonds
Cross-reactivity is common with peach allergens (lipid transfer proteins) and tree nut allergens.

Quaternium-15

quaternium-15 (10.3%), and
Quaternium-15 is an allergen, and can cause contact dermatitis in susceptible individuals.

Mosquito

mosquitoesmosquitosCulicidae
mosquito stings
Rather, they are allergic hypersensitivity reactions caused by the non-toxic allergenic proteins contained in the mosquito's saliva.

Allergen immunotherapy

sublingual immunotherapyallergy immunotherapyoral immunotherapy
Treatment includes over-the-counter medications, antihistamines, nasal decongestants, allergy shots, and alternative medicine.
Immunotherapy involves exposing people to larger and larger amounts of allergen in an attempt to change the immune system's response.

Asthma

asthma attackbronchial asthmaasthmatic
Environmental factors include exposure to air pollution and allergens.

List of allergens

allergic to dogsallergies to dogsallergy to animal dander
This is a list of allergies, which includes the allergen, potential reactions, and a brief description of the cause where applicable.

Timothy-grass

timothytimothy haytimothy grass
grass — ryegrass, timothy-grass
Its pollen is a common allergen; it has recently been used in small amounts as part of a new hay fever vaccine Grazax, which is designed to recondition the body's immune system so it no longer responds to pollen.

Hypoallergenic

hypo-allergenicnon-allergenic
Hypoallergenic pet breeds still produce allergens, but because of their coat type, absence of fur, or absence of a gene that produces a certain protein, they typically produce fewer allergens than other breeds of the same species may.