quellung reaction(redirected from capsular precipitation reaction)
Also found in: Dictionary, Thesaurus, Medical.
quellung reaction[′kwel·əŋ rē‚ak·shən]
Swelling of the capsule of a bacterial cell, caused by contact with serum containing antibodies capable of reacting with polysaccharide material in the capsule; applicable to Pneumococcus, Klebsiella, and Hemophilus.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.