Pathology
Saccharoyces cerevisiae is not normally considered to be a pathogen. In healthy people, disease resulting from S. cerevisiae colonizing in a particular area are very rare, but have been reported. While yeast that normally colonize in the GI tract are not the direct cause of any disease, hypersensitivity to antibodies produced against could prove an irritant for people with Crohn's disease, an autoimmune disorder. (20). 1% of all vaginal yeast infections occur due to S. cerevisiae in the vagina, but symptoms associated with it are identical to the symptoms caused due to another organism more commonly associated with yeast infections, Candida albicans. (21). The only people susceptible to serious problems are immunosuppressed individuals, followed by those who have taken S. cerevisiae as an probiotic for diarrhea. For these individuals, the prevailing condition is fungemia (1). Caused by the presence of yeasts in the blood, its symptoms have been described as "flu-like".