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Table 2 Comparison of TBARS content of eight E. coli at both phases (exponential and stationary) of growth in pooled human urine and LB broth

From: Variation in endogenous oxidative stress in Escherichia coli natural isolates during growth in urine

  Urine exponential phase Urine stationary phase Urine exponential phase vs stationary phase
Strains TBARS* p** TBARS p p
ABU83972 7.3 ± 1.0   4.4 ± 0.4   p = 0.014
CFT073 6.3 ± 0.8 p = 0.902 4.7 ± 0.8 p = 1.000 p = 0.450
ED1a 5.2 ± 1.1 p = 0.070 5.2 ± 0.8 p = 0.927 p = 1.000
536 5.1 ± 1.0 p = 0.048 4.1 ± 0.6 p = 1.000 p = 0.993
IAI1 4.3 ± 0.7 p = 0.002 4.6 ± 0.7 p = 1.000 p = 1.000
Sakai 3.9 ± 0.4 p = 0.001 4.2 ± 0.3 p = 1.000 p = 1.000
UIT89 3.8 ± 0.6 p = 0.001 3.9 ± 0.1 p = 0.997 p = 1.000
MG1655 2.6 ± 0.5 p < 0.0001 4.0 ± 1.0 p = 0.999 p = 0.880
  LB broth exponential phase LB broth stationary phase LB broth exponential phase vs stationary phase
Strains TBARS p TBARS p p
ABU83972 6.4 ± 0.1   8.9 ± 1.6   p = 0.394
CFT073 5.9 ± 0.6 p = 0.993 6.5 ± 0.4 p = 0.458 p = 1.000
ED1a 4.9 ± 0.2 p = 0.492 6.8 ± 1.2 p = 0.581 p = 0.763
536 6.3 ± 1.7 p = 1.000 5.4 ± 1.9 p = 0.135 p = 0.998
IAI1 4.4 ± 0.3 p = 0.219 6.8 ± 0.1 p = 0.571 p = 0.465
Sakai 4.6 ± 0.7 p = 0.316 6.7 ± 1.1 p = 0.543 p = 0.635
UIT89 5.1 ± 0.1 p = 0.656 7.4 ± 0.4 p = 0.844 p = 0.540
MG1655 5.5 ± 0.1 p = 0.907 7.0 ± 0.1 p = 0.680 p = 0.942
  1. * TBARS values are expressed in micromoles per 1011 cells. The data shown are means (mean ± SD) of three independent experiments in different batches of urine and LB broth. Differences between means were evaluated for statistical significance using the Tukey's HSD (Honestly Significant Difference) test.
  2. ** p values of < 0.05 were considered significant. compared to ABU83972 under the same conditions.