TYPING GROUP A HEMOLYTIC STREPTOCOCCI BY M PRECIPITIN REACTIONS IN CAPILLARY PIPETTES
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چکیده
منابع مشابه
Typing Group a Hemolytic Streptococci by M Precipitin Reactions in Capillary Pipettes
A method is described for performing type-specific anti-M precipitin tests on group A hemolytic streptococci in 1 mm. capillary pipettes. These tests require so much less precipitating serum than was formerly used that the method now seems to be practical.
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...
متن کاملAntigenicity of the M Proteins of Group a Hemolytic Streptococci
Highly purified M proteins were used for determining cutaneous hypersensitivity and type-specific circulating antibodies in normal adults and infants. 80% of 91 adults and 8% of 59 infants exhibited a transient delayed cutaneous reaction to at least two of types 12, 14, and 24 M proteins. Antibodies assayed by passive hemagglutination were observed in 90% of the adults and 13% of the infants. V...
متن کاملThe Serological Typing of Hemolytic Streptococci
The relationships among the hemolytic streptococci have been greatly clarified by the fundamental work of Lancefield (1). She has shown that these organisms may be classified into groups on the basis of a precipitin reaction and ample evidence has accumulated (2, 3) to show that almost all human infections are caused by members of her Group A. Strains of the groups from B to K are responsible f...
متن کاملThe Significance of M and T Antigens in the Cross Reactions between Certain Types of Group a Hemolytic Streptococci
In any one strain the occurrence of the previously recognized type-specific protein, M, is usually completely correlated with the presence of the recently recognized type-specific antigen, T. Strain C203 is exceptional in having the T substance of type 1 as well as the two type-specific antigens, M and T, characteristic of type 3. It does not have the M antigen of type 1. While other strains wi...
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ژورنال
عنوان ژورنال: Journal of Experimental Medicine
سال: 1943
ISSN: 1540-9538,0022-1007
DOI: 10.1084/jem.78.2.127