From Big Medical Encyclopedia

PARALLERGY (grech, para near allergy; synonym: parallergic reactions, heteroallergic reactions) — the type of allergic reaction, at a cut specifically sensibilized organism answers with the changed reaction to various nonspecific irritants. So, the child has a positive reaction to tuberculine after an inoculation to it smallpox.

In many cases of P. it is not possible to find immune mechanisms. Designates such reactions of A. D. Ado as false allergic or a psevdoallergicheskpa. Treat them Shvarttsman's phenomenon (see. Shvarttsmana phenomenon ), anaphylactoid shock (see. Anaphylactoid reactions ), reactions to pharmaceuticals at people with nek-ry enzymopathies.

Nek-ry parallergic reactions have immune mechanisms in the basis and are essentially cross allergic reactions. It is connected with the fact that different types allergens (see) can have the general antigenic determinants. Cross allergic reactions can arise on pollen of related plants; on pollen of plants of family of cereals at food allergy to products from grains of cultural cereals; on the pharmaceuticals received from plants of family of a thistle family; napr, camomiles, at an allergy to pollen of plants of family of a thistle family; on a serum protein of a horse, e.g., at the persons having an epidermal allergy.

See also Allergy .

Bibliography: Ado A. D. General allergology, M., 1978; The Allergy and allergic diseases, under the editorship of E. Rayk, the lane with Wenger., t. 1 — 2, Budapest, 1966; Zdrodovsky P. F. Problems of an infection, immunity and allergy, M., 1969.

A. A. Polner.