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Updated: Jan 28, 2026

Genotyping of Staphylococcus aureus by Ribosomal Spacer PCR RS-PCR
Published on: November 4, 2016
Modified Vogel and Johnson Agar for Staphylococcus aureus
Gail P Andrews1, Scott E Martin1
1Department of Food Science, University of Illinois, Urbana, Illinois 61801.
Abstract:
The formula for a modified Vogel and Johnson Agar is presented. In addition to the ingredients found in Vogel and Johnson Agar, the new medium contains, per liter: 5 g of beef extract, 2 g of deoxyribonucleic acid, 2 g of phosphatidyl choline and 780 units of catalase spread on the plates before inoculation. This new medium is as effective as Baird-Parker Agar in enumeration of stressed Staphylococcus aureus , and in enumeration of staphylococci from naturally contaminated processed food samples.
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