passive cutaneous anaphylaxis test

pas·sive cu·ta·ne·ous an·a·phy·lax·is test

an animal is injected intradermally with antibody (usually IgE) and subsequently challenged intravenously with a mixture of antigen and Evans blue dye 24-48 hours later. A dark blue area indicates a positive reaction due to the leakage of the dye at the site of antigen-antibody reactions.
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