Crystal Violet Agar as a Differential Medium for Staphylococci
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چکیده
منابع مشابه
Crystal Violet Agar as a Differential Medium for Staphylococci.
In a previous paper Chapman, Berens, Peters and Curcio (1934) showed that staphylococci could be differentiated on the basis of their hemolysis and coagulase reactions. It was further shown that a critical interpretation of the hemolysis test depended upon an accurate knowledge of the pigment production of the strain. The existence of intermediate-colored strains or of dissociants showing wide ...
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Twenty four reference strains and 112 clinical isolates of coagulase negative staphylococci (CNS) were examined for their reactions in the crystal violet test. Some species gave a white reaction and others a purple reaction. Results were consistent and reproducible and each species gave only one pattern of crystal violet reaction. Within the limited variety of species represented in the clinica...
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The coagulae-positive staphylococci comprise a very homogeneous, readily identifiable species (Evans and Niven, 1950; Shaw et al., 1951) that includes all of the proven pathogenic and enterotoxin-producing strains of staphylococci. As a result of the clinical and public health significance of these organisms, a selective medium for their isolation and enumeration would have considerable value. ...
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An agar medium containing arginine and calcium citrate as specific substrates, diffusible (K(2)HPO(4)) and undiffusible (CaCO(3)) buffer systems, and bromocresol purple as the pH indicator was developed to differentiate among lactic streptococci in pure and mixed cultures. Milk was added as the sole source of carbohydrate (lactose) and to provide growth-stimulating factors. Production of acid f...
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ژورنال
عنوان ژورنال: Journal of Bacteriology
سال: 1935
ISSN: 0021-9193,1098-5530
DOI: 10.1128/jb.29.5.437-448.1935