THE ANTIGENIC STRUCTURE OF HEMOLYTIC STREPTOCOCCI OF LANCEFIELD GROUP A
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چکیده
منابع مشابه
Studies on the Antigenic Composition of Group a Hemolytic Streptococci
1. In this study a series of experiments showing the antigenic relationship of type 10 and type 12 group A hemolytic streptococci is reported. Agglutinin, precipitin, and passive protection tests with unabsorbed and reciprocally absorbed antisera were employed to show that representative type 10 and 12 strains contain serologically identical M antigens but unrelated type-specific T antigens. 2....
متن کاملThe Lancefield Groups of Hemolytic Streptococci Found in Children *
In a recent paper Boisvert,' reports that of 509 strains of Streptococcus hemolyticus isolated from 262 cases of streptococcal disease and grouped by means of the precipitin test, all fell into Lancefield's Group A; all of these cases were infants and children. Our own work has been along similar lines and was planned as a further test of the striking relationship between Group A streptococci a...
متن کاملTyping Group a Hemolytic Streptococci
Two methods of typing group A hemolytic streptococci have been described: slide agglutination and anti-M precipitin tests. The first, developed by Griffith (1), is more extensively used. I t has the distinct advantages of requiring small amounts of serum and culture, and of a quick reaction time when all conditions are favorable. I t has certain disadvantages: The granular growth of some strain...
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1. A substance extracted from group A hemolytic streptococcus is described, which induces active immunity in mice, and in rabbits gives rise to precipitins and to protective antibodies passively transferable to mice. 2. The active immunity in mice is principally type-specific, but some degree of non-type-specific immunity is also developed. The passively transferable protective antibodies are t...
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this study was undertaken in order to ascertain the carrier rate of group a hemolytic streptococci in the throats of pupils in selected schools of tehran, and to evaluate the role of socio-economical factors on carrier state. during the period of six months, 7020 children and adolescents, aged 10 to 17, were studied. these pupils were visited at their schools and their socio-economical level wa...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1942
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(18)45080-6