allergic

al·ler·gic (-lûrjk)

adj.

1. Of, caused, or characterized by an allergy.

2. Having an allergy or exhibiting an allergic reaction to a substance.

---

allergic

pertaining to or caused by allergy.

---

allergic alveolitis

see atypical interstitial pneumonia.

allergic breakthrough

a theory which attributes temporary increases in clinical severity of atopy to influences, such as concurrent disease or hormonal variations, acting to inhibit the mechanisms which normally regulate production of IgE at low levels following sensitization.

allergic bronchitis

see bronchitis, feline bronchial asthma, pie syndrome.

allergic contact dermatitis

results from percutaneous sensitization to allergens, usually haptens, that form covalent bonds with epidermal proteins, and the development of a delayed (type IV) hypersensitivity. Lesions typically correspond in location to the area of contact between allergen and skin which in animals is often in relatively hairless areas unless the allergen is presented in liquid form.

allergic dermatitis

inflammation of the skin resulting from exposure to antigens to which the animal is hypersensitive. Usually involving immediate (type I) hypersensitivity but also commonly applied to reactions involving delayed (type IV) hypersensitivity. The specific skin reaction, lesions and pattern of disease produced depend on many factors including the type of allergen and immune mechanism, route of exposure and species differences. See also atopy, sweet itch, allergic contact dermatitis (above).

allergic encephalitis

see experimental allergic encephalomyelitis.

equine allergic dermatitis

an intensely itchy dermatitis along the back of horses caused by sensitivity to the bites of the sandfly Culicoides brevitarsus and possibly other insects. Called also sweet itch, Queensland itch.

allergic inhalant dermatitis

see atopy.

allergic reaction

an immune-mediated, adverse clinical response, following the inhalation, ingestion or injection of an antigen by a sensitized animal. Manifestations include urticaria or anaphylaxis.

allergic rhinitis

see enzootic nasal granuloma, summer snuffles.

allergic urticaria

see urticaria.