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. 1986 Apr;261(2):167-9.
doi: 10.1016/s0176-6724(86)80032-3.

beta-D-galactosidase activity in streptococci of serological group B

beta-D-galactosidase activity in streptococci of serological group B

C Lämmler et al. Zentralbl Bakteriol Mikrobiol Hyg A. 1986 Apr.

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.

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