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Kombucha Tea can become toxic if it becomes contaminated by pathogenic moulds or bacteria, such as C. botulism. However, these organisms will not grow in an acidic medium below pH 4. See also: http://freespace.virgin.net/eddy.weir/myco.htm http://www.harmonicharvest.com/mold.html http://pollenuk.worc.ac.uk/Aero/FUNGI/images.
