Staphylococcus epidermidis Growing on Mannitol Salt Agar

Mannitol salt agar is selective for staphylococci because of the high salt concentration. There is no mannitol fermentation and, therefore, no acid production. The pH indicator phenol red remains red (alkaline).
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Microbiology Laboratory Manual by Gary E. Kaiser, PhD, Professor of Microbiology
is licensed under a Creative Commons Attribution 4.0 International License.
Last updated: September, 2017