, Volume 18, Issue 2, pp 139-142

Characterization of the tea fungus metabolites

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The tea fungus (commonly designed as “kombucha”) is a symbiotic culture of at least three microorganisms: the acetic acid bacteria Acetobacter xylinum and two yeasts Zygosaccharomyces rouxii and Candida sp. in sugared tea (Hesseltine, 1965; Anonymous, 1983). These microorganisms were cultured in their traditional medium and several metabolites were identified and quantified : ethanol, lactic, acetic, gluconic and glucuronic acids. The antibacterial product known as usnic acid was also searched.