Extracellular antigens of serotype III group B streptococci.
Two sialic acid-containing type III group B streptococcal antigens were obtained from a supernatant growth medium, purified by anion exchange or gel filtration, and found to be free of group B reactivity. Quantitation of the high-molecular-weight extracellular type III antigen indicated that approximately 20-fold more antigen was recoverable from the growth medium than could be obtained by neutral buffer extraction of whole cells.
D000942:Antigens, Bacterial / Q000032:analysis*; D002850:Chromatography, Gel; D002852:Chromatography, Ion Exchange; D003470:Culture Media / Q000032:analysis; D012703:Serotyping; D013292:Streptococcus agalactiae / Q000276:immunology*
D000942:Antigens, Bacterial; D003470:Culture Media