Clostridia break down sugars with its saccharolytic enzymes to acetate, Propionate / Propionic acid, butyrate, lactate, ethanol - there are some Amino Acid Fermentation speciesMacfarlane et al. 1995 In Gastrointestinal and Oesophageal Pathology, 2nd ed., pp. 249-274 [R Whitehead, editor]. Edinburgh: Churchill Livingstone
see also:Short-Chain Fatty Acids (SCFAs)-Producing Bacteria