Fig. 2

Examination for heritability of persistence. Exponential growing cells of RA 11845 were challenged with 80-fold MIC of ceftiofur (a), ciprofloxacin (b), or spectinomycin (c) for 48 h in three consecutive cycles. The detection limit was 10² CFU/ml. Each spot showing on the figure was the mean of three biological replicates. The error bars represent the standard deviation of the mean