Article · Wikipedia archive · Last revised Jun 12, 2026

YM (selective medium)

YM Agar and Broth, is a selective growth medium with low pH useful for cultivating yeasts, molds, or other acid-tolerant or acidophilic organisms, while deterring growth of most bacteria and other acid intolerant organisms. It is malt extract medium modified by the addition of yeast extract and peptone.

Last revised
Jun 12, 2026
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YM Agar and Broth, is a selective growth medium with low pH useful for cultivating yeasts, molds, or other acid-tolerant or acidophilic organisms, while deterring growth of most bacteria and other acid intolerant organisms.1 It is malt extract medium modified by the addition of yeast extract and peptone.2

The 'YM' of the name stands either for 'Yeast and Mold', or 'Yeast extract-Malt extract' depending on the source.

Variations include YMG agar/broth, which contains yeast, malt, and glucose.3

References

References

  1. "Xanthine Agar YM Agar • YM Broth" (PDF). Becton, Dickinson and Company. Retrieved 2008-07-13.
  2. Carlos Rosa, Gábor Péter (2005-11-18). Biodiversity and Ecophysiology of Yeasts: The Yeast Handbook. Springer. ISBN 9783540261001. Retrieved 2008-07-13.
  3. "Yeast and Malt Extract with Glucose Agar Recipe". LabRat. theLabRat.com. 2005. Retrieved 23 February 2018.