Synthetic Media for Culture of Certain Hemolytic Streptococci
نویسندگان
چکیده
منابع مشابه
A New Growth Factor Required by Certain Hemolytic Streptococci
A new factor essential for the growth of hemolytic streptococci of Lancefield's group A has been demonstrated. It has not been possible to identify this factor with any other known growth factor. The active substance occurred in liver as a water-soluble, alcohol-insoluble, non-dialyzable material. It could be rendered dialyzable by treatment in strong alcohol with HCl, but not by many less dras...
متن کاملThe Classification of Hemolytic Streptococci
1. The hemolytic variety of streptococcus is homogeneous, consisting of members that are nearly identical. 2. This homogeneity is most strikingly displayed in the behavior of these streptococci in the complement fixation reaction, all the strains studied reacting in a nearly identical way with all the antisera.
متن کاملEstablishment of synthetic growth media for mammalian cell culture.
Eagle showed that a medium containing the 13 amino acids and the seven vitamins found to be essential for the growth of L and HeLa cells, each at the optimum concentration and appropriately supplemented with glucose, does not permit growth unless a small amount of serum was added (Eagle, 1973). Therefore it has been suggested that serum contains macromolecular factors required for multiplicatio...
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 کاملStudies upon Minute Hemolytic Streptococci
1. Minute beta hemolytic streptococci were found to occur from one-third to one-half as frequently in normal individuals as do ordinary beta hemolytic streptococci. 2. They were rarely isolated from the rhinopharynges of individuals suffering from chronic disease. 3. In acute respiratory tract infection other than that due to the ordinary beta hemolytic streptococcus the incidence of minute str...
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ژورنال
عنوان ژورنال: Journal of Bacteriology
سال: 1940
ISSN: 0021-9193,1098-5530
DOI: 10.1128/jb.39.3.287-296.1940