Continued Study of Oral Nocardia

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Abstract
All of the 28 strains of N. dentocariosus isolated from carious human teeth which were studied demonstrated variability in colonial and cellular morphology. Colony form varied from smooth to rough; colony size varied from microscopic to macroscopic puntiform colonies. The cells varied from cocci to filaments with subsequent fragmentation during growth. Standard tests routinely used for identification procedures proved unreliable. Gelatinase activity was constant only in buffered solutions and catalase proved to be an adaptive enzyme.

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