Three cutaneous propionibacteria - and - were grown in chemostats using semi-synthetic medium with various concentrations of glucose. Biomass rose with increasing glucose concentration up to 0.3-0.4% (w/v) and then remained constant. had both a low yield and low μ when grown in the absence of glucose suggesting that this organism is essentially ‘saccharolytic’ in its nutrition. In contrast, and had higher growth yields than and showed their highest μ values in the absence of glucose. Extracellular lipase, hyaluronidase (hyaluronate lyase) and acid phosphatase activities varied with different glucose concentrations, but in all cases were lowest at the highest glucose concentration tested (0.5%, w/v).


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