title: beta-D-galactosidase activity in streptococci of serological group B.
abstract: Group B streptococci isolated from humans differed significantly in beta-D-galactosidase-activity from those of bovine mastitis. This could be demonstrated in a relatively simple and rapid test using a fluorogenic 4-methylumbelliferyl-beta-D-galactoside conjugate. Only 10 (12%) of 82 group B streptococcal cultures from human produced beta-D-galactosidase. On the other hand, 74 (96%) of 77 "bovine" cultures formed this enzyme. Thus, beta-D-galactosidase activity could be used as an additional marker for the differentiation between group B streptococci of human and bovine origin.
mesh_terms: D000118:Acetylglucosaminidase / Q000378:metabolism; D000818:Animals; D002417:Cattle; D005260:Female; D005696:Galactosidases / Q000378:metabolism*; D005966:Glucuronidase / Q000378:metabolism; D006801:Humans; D006923:Hymecromone / Q000032:analysis*; D008414:Mastitis, Bovine / Q000382:microbiology; D013290:Streptococcal Infections / Q000382:microbiology; D013292:Streptococcus agalactiae / Q000145:classification / Q000201:enzymology*; D014468:Umbelliferones / Q000032:analysis*; D001616:beta-Galactosidase / Q000378:metabolism*
chemical_list: D014468:Umbelliferones; D006923:Hymecromone; D005696:Galactosidases; D001616:beta-Galactosidase; D005966:Glucuronidase; D000118:Acetylglucosaminidase