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Infect Immun. 1973 February; 7(2): 205-211
Copyright © 1973 American Society for Microbiology. All Rights Reserved.

Antigens of Streptococcus sanguis

Burton Rosan

¹ Center for Oral Health Research, University of Pennsylvania, Philadelphia, Pennsylvania 19104

ABSTRACT

An antigenic analysis of the alpha-hemolytic streptococci isolated from dental plaque was performed by use of antisera against a strain of Streptococcus sanguis (M-5) which was isolated from dental plaque. Immunoelectrophoretic and Ouchterlony tests of Rantz and Randall extracts of 45 strains gave positive reactions with the M-5 antisera. These strains represented 60% of the strains tested. The number of antigens which could be identified in these extracts varied from one to five and were designated a to e. The a antigen was found in 36 of the strains tested, including reference strains of S. sanguis and the group H streptococci. The strains reacting with the M-5 antisera were divided into two majors types: type I consisted of 23 strains in which the a antigen was found alone or with one or more of the c, d, and e antigens; type II consisted of 13 strains in which both the a and b antigens were found with or without one or more of the c, d, and e antigens. The remaining strains contained, either singly or in combination, the b, c, d, and e antigens but not the a antigen. Biochemical tests of representatives of each serotype and reference strains indicated that strains reacting with M-5 antisera were S. sanguis. These findings suggest that S. sanguis strains share common physiological and serological properties.

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Infect Immun. 1973 February; 7(2): 205-211
Copyright © 1973 American Society for Microbiology. All Rights Reserved.

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