Differential diagnosis of Staphylococcus aureus from Staphylococcus epidermidis and Staphylococcus saprophyticus by alphazurine A dye |
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Authors: | WW Ayres J Duda |
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Affiliation: | Ayres Medical Laboratory, Uniontown, PA 15401. |
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Abstract: | Staphylococcal bacterial suspensions were streaked on Trypticase soy agar with 5% sheep blood culture plates. Paper discs containing alphazurine A, a triphenylmethane dye, were placed on the inoculated plates which were incubated at 37 degrees C for 24 hours. A wide zone of inhibition of growth of Staphylococcus aureus was present around the paper discs. Growth of Staphylococcus epidermidis and Staphylococcus saprophyticus was not inhibited. |
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