PCA
\pˌiːsˌiːˈe͡ɪ], \pˌiːsˌiːˈeɪ], \p_ˌiː_s_ˌiː__ˈeɪ]\
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An evanescent cutaneous reaction occurring when antibody is injected into a local area on the skin and antigen is subsequently injected intravenously along with a dye. The dye makes the rapidly occurring capillary dilatation and increased vascular permeability readily visible by leakage into the reaction site. PCA is a sensitive reaction for detecting very small quantities of antibodies and is also a method for studying the mechanisms of immediate hypersensitivity.
By DataStellar Co., Ltd
