O antigen


Also found in: Dictionary, Thesaurus, Medical.
Related to O antigen: H antigen, K antigen

O antigen

[′ō ′ant·i·jən]
(microbiology)
A somatic antigen of certain flagellated microorganisms.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.