1887

Abstract

The authors compared the differences in tolerance to oxygen of the anaerobic periodontopathic bacteria and , and explored the possibility that might be able to support the growth of in aerated and CO-depleted environments. Both micro-organisms were grown as monocultures and in co-culture in the presence and absence of CO and under different aerated conditions using a continuous culture system. At steady state, viable counts were performed and the activities of the enzymes superoxide dismutase and NADH oxidase/peroxidase were assayed in . In co-culture, was able to support the growth of in aerated and CO-depleted environments in which , as a monoculture, was not able to survive. not only appeared to have a much higher tolerance to oxygen than , but a significant increase in its numbers occurred under moderately oxygenated conditions. might have an additional indirect role in dental plaque maturation, contributing to the reducing conditions necessary for the survival of and possibly other anaerobes less tolerant to oxygen. Additionally, is able to generate a capnophilic environment essential for the growth of .

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2002-02-01
2019-08-26
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