Aerobic and anaerobic fermentation of glucose by Echinostoma liei

Echinostoma liei was incubated in vitro aerobically and anaerobically with various species of 14C glucose. From the recovery of isotope in the respired CO2, it appeared that glucose was incompletely oxidized. The major portion of the CO2 arose from the 3 and 4 carbons of glucose. In addition to CO2, a number of volatile fatty acids accumulated as end-products both aerobically and anaerobically. Lactate and succinate were also isolated. Of these, n-valerate was recovered in the highest concentrations. Qualitatively, the same products were demonstrated after both aerobic and anaerobic incubations, but quantitatively considerably more fatty acids accumulated anaerobically.