Saccharomyces boulardii (“Brewer’s/baker’s yeast”) seems to be one such strain. It is commonly taken therapeutically to keep other fungi and bacteria under con

Saccharomyces boulardii (“Brewer’s/baker’s yeast”) seems to be one such strain. It is commonly taken therapeutically to keep other fungi and bacteria under control. https://en.wikipedia.org/wiki/Saccharomyces_boulardii https://en.wikipedia.org/wiki/Saccharomyces_boulardii