From Everything.Sucks
Saccharomyces boulardii is a tropical species of yeast first isolated from lychee and mangosteen fruit in 1923 by French scientist Henri Boulard. Although early reports described distinct taxonomic, metabolic, and genetic properties, S. boulardii is a strain of S. cerevisiae, sharing >99% genomic relatedness, giving the synonym S. cerevisiae var boulardii. A type strain is Hansen CBS 5926.S. boula