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This figure shows a representation of the growth of a bacterium in the absence of antibiotic A. The horizontal axis is labelled time and the vertical axis is labelled log (no. of viable cells). The line crosses the vertical axis near the bottom before sloping upwards up until a point at which antibiotic A was added, which is indicated by an arrow. At this point the graph stops.

 4.3 Bactericidal versus bacteriostatic antibiotics