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Serum killing coincides with the start of bacterial growth. E. coli CFT073 stationary-phase cells were diluted in either fresh LB medium, PBS, 50% HIS in 1× PBS, or 50% serum in 1× PBS and grown statically at 37°C without shaking. The CFU were determined at the indicated time points. The averages and standard deviations of at least three independent experiments are presented.
