New protective antigen of group A streptococci
نویسندگان
چکیده
منابع مشابه
New protective antigen of group A streptococci.
It is widely believed that the surface M protein of group A streptococci is the predominant surface protein of these organisms containing opsonic epitopes. In the present study, we identified a new surface protein, distinct from M protein, that evokes protective antibodies. A type 18 M-negative mutant was found to be both resistant to phagocytosis in human blood and virulent in mice. The wild-t...
متن کاملMolecular analysis of group B protective surface protein, a new cell surface protective antigen of group B streptococci.
Group B streptococci (GBS) express various surface antigens designated c, R, and X antigens. A new R-like surface protein from Streptococcus agalactiae strain Compton R has been identified by using a polyclonal antiserum raised against the R protein fraction of this strain to screen a lambda Zap library. DNA sequence analysis of positive clones allowed the prediction of the primary structure of...
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Group B streptococci (GBS) are the leading causes of neonatal sepsis and meningitis in the United States, with a high rate of fatality and serious morbidity despite appropriate therapy. The C-protein antigens of GBS appear to be important in immunity to experimental infection, yet these antigens remain incompletely characterized with respect to their number, structure, and function. None of the...
متن کاملStreptococcal group B type antigen X in group L streptococci.
Extracts from 19 of 29 group L streptococcal cultures reacted distinctly with antiserum against group B streptococcal type antigen X in coagglutination and immunodiffusion tests. The X antigen corresponded to those obtained by streptococci of serological groups B and G.
متن کاملMolecular analysis of Group B protective surface protein, a new cell surface protective antigen of Group B Steptococci
Group B streptococci (GBS) express various surface antigens designated c, R, and X antigens. A new R-like surface protein from Streptococcus agalactiae strain Compton R has been identified by using a polyclonal antiserum raised against the R protein fraction of this strain to screen a lambda Zap library. DNA sequence analysis of positive clones allowed the prediction of the primary structure of...
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ژورنال
عنوان ژورنال: Journal of Clinical Investigation
سال: 1999
ISSN: 0021-9738
DOI: 10.1172/jci5118