IN VITRO VARIATION IN GROUP A STREPTOCOCCI WITH SPECIAL REFERENCE TO STREPTOLYSIN FORMATION
نویسندگان
چکیده
منابع مشابه
The Presence of a Group a Variant-like Antigen in Streptococci of Other Groups with Special Reference to Group N
A Group A variant-like antigen has been detected in streptococci belonging to Groups D, E, G, M, and N. In Groups D and N the variant-like antigen was located in the streptococcal cell walls. In two strains of Group N streptococci (C559 and B209) the cell walls were chemically different and serologically distinct. In strain C559 N-acetylgalactosamine, and in strain B209, N-acetylglucosamine wer...
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Colicinelike substances, bacteriocines, are produced by many strains of Group A and non-Group A streptococci. Bacteriocines were detected by their inhibitory action on the growth of 2 Group A strains which served as indicators. Streptococcal bacteriocines were demonstrable on agar plates only if the bacteriocine-producing strain and the indicator lawn were alive and actively growing. The inhibi...
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Group A streptococcus (GAS) is responsible for a range of human diseases that vary in their clinical manifestations and severity. While numerous virulence factors have been described, the way these factors interact to promote different streptococcal diseases is less clear. In order to identify multifactorial relationships between GAS and the human host, novel high-throughput techniques such as ...
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Immunoelectrophoresis revealed in phenol extracts from S. faecalis and S. faecium a mixture of free and lipid-bound teichoic acids, both reactive with Group D antisera. In phenol extracts from S. suis only lipid-bound teichoic acid, also reactive with Group D antiserum, was seen. This difference probably accounts for the low yield of Group D antigen from S. suis as compared with S. faecalis and...
متن کاملIdentification of protein antigens of group B streptococci, with special reference to the Ibc antigens
The protein antigens of prototypes of five types of group B streptococcal strains were extracted with HCl or Triton X-100, separated by sodium dodecyl sulfate polyacrylamide electrophoresis, transferred to nitrocellulose, and examined by immunochemical staining. The Ibc proteins are shown to consist of at least two distinct protein antigens and their breakdown products. One antigen, the "beta" ...
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ژورنال
عنوان ژورنال: Journal of Bacteriology
سال: 1955
ISSN: 0021-9193,1098-5530
DOI: 10.1128/jb.69.3.326-332.1955