Definition: the reversible phenomenon, occurring in vitro or in vivo, of an antibody combining with an antigen of the type that stimulated the formation of the antibody, thereby resulting in agglutination, precipitation, complement fixation, greater susceptibility to ingestion and destruction by phagocytes, or neutralization of exotoxin.
See Also: skin test
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Examples: glitazone, GI cocktail, etc.
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