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wheal-and-flare skin reaction

См. также в других словарях:

  • wheal and erythema reaction — wheal and flare reaction the characteristic local cutaneous reaction consisting of an elevated, blanched wheal surrounded by a spreading “flare” of erythema that occurs within a few minutes at the site of a minor nonpenetrating skin injury… …   Medical dictionary

  • reaction — 1. The response of a muscle or other living tissue or organism to a stimulus. 2. The color change effected in litmus and certain other organic pigments by contact with substances such as acids or alkalies; also the property that such substances… …   Medical dictionary

  • flare — 1. A gradual tapering or spreading outward. 2. A diffuse redness of the skin extending beyond the local reaction to the application of an irritant; it is due to dilation of the arterioles and capillaries; depends upon an axon reflex set up by the …   Medical dictionary

  • skin disease — ▪ pathology Introduction  any of the diseases or disorders that affect the human skin. They have a wide range of causes. General features       Although most diseases affecting the skin originate in the layers of the skin, such abnormalities are… …   Universalium

  • Allergy — Classification and external resources Hives are a common allergic symptom. ICD 10 T78.4 …   Wikipedia

  • test — 1. To prove; to try a substance; to determine the chemical nature of a substance by means of reagents. 2. A method of examination, as to determine the presence or absence of a definite disease or of some substance in any of the fluids, tissues,… …   Medical dictionary

  • immune system disorder — Introduction        Disorders of the immune systemany of various failures in the body s defense mechanisms against infectious organisms (see table (Disorders of the immune system)). Disorders of immunity include immune deficiency diseases, such… …   Universalium

  • Casoni intradermal test — (for hydatid disease) after injection into the skin of hydatid fluid, if there is immediate or delayed production of a wheal and flare reaction, this denotes hydatid infection. The test is now little used because of low specificity …   Medical dictionary

  • response — 1. The reaction of a muscle, nerve, gland, or other excitable tissue to a stimulus. 2. Any act or behavior, or its constituents, that a living organism is capable of emitting. Reflexes are usually excluded because they are typically elicited by a …   Medical dictionary

  • Mast cell — Mast cells Latin mastocytus Code TH …   Wikipedia

  • triple response — of Lewis a physiologic reaction of the skin to stroking with a blunt instrument: first a red line develops at the site of stroking, owing to the release of histamine or a histaminelike substance, then a flare develops around the red line due to… …   Medical dictionary

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