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Effects of cell wall inhibitors on cell division in Streptococcus mutans.

By T A Kral and L Daneo-Moore


The addition of inhibitors of cell wall biosynthesis to exponential-phase cultures of Streptococcus mutans may do one of three things, depending on the concentrations used: (i) prevent cell division at a time coincident with the onset of chromosome replication, (ii) prevent cell division later in the cell cycle coincident with or near completion of septation, or (iii) lead to limited cell lysis. The relative tolerance of S. mutans to inhibitors of cell wall biosynthesis may be due to the fact that S. mutans cultures treated with low levels of cell wall antibiotics seem to be blocked at a stage before initiation of autolytic activity, whereas cultures treated with high levels of these antibiotics seem to be blocked after termination of the autolytic phase. Thus, the cells escape the lytic death that is seen in other streptococci exposed to inhibitors of cell wall biosynthesis

Topics: Research Article
Year: 1983
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Provided by: PubMed Central
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