SELECTIVE AND DIFFERENTIAL MEDIA
staphylococci. The medium contains mannitol, a phenol red indicator, and 7.5% sodium chloride. The high salt concentration inhibits the growth of most bacteria other than staphylococci. On MSA, pathogenic Staphylococcus aureus produces small colonies surrounded by yellow zones. The reason for this change in color is
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SELECTIVE AND DIFFERENTIAL MEDIA - …
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