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Autolysis and Secondary Growth of Mycobacterium tuberculosis in Submerged Culture

Bacteriology Research Laboratory, Veterans Administration Hospital, San Fernando, California

ABSTRACT

Mycobacterium tuberculosis has been found to exhibit autolysis and spontaneous secondary growth in modified Sauton medium. The phenomenon is a function of high glycerol concentration of the medium and limitation of air in test tubes. It is not a function of depletion of nutrients and is probably not a manifestation of lysogeny or spheroplast formation. The cycle of growth, autolysis, and secondary growth is related to development of lethal conditions during a period of severe oxygen limitation followed by a metabolic change associated with slower depletion of glycerol.

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