Table 2.

Growth rates and late-stationary phase CFU/mL counts for Escherichia coli MG1655 wild type strain (WT) and its derivative strains obtained by selection with carvacrol (CAR), citral (CIT), and (+)-limonene oxide (LIM) grown at 37°C for 24 h in tryptic soy broth with yeast extract added.

Strain	Growth rate	Late-stationary growth phase (24 h) CFU/mL
WT	1.06 ± 0.141	2.45 × 109 ± 2.95 × 108a
CAR	0.86 ± 0.121	1.61 × 109 ± 2.14 × 108b
CIT	1.45 ± 0.501	8.41 × 108 ± 9.06 × 107c
LIM	1.31 ± 0.301	2.26 × 109 ± 3.19 × 108a

Data are means of three independent observations ± standard deviations.

^a,b,csame letters or

¹numbers indicate non-significant differences among mean values; p > 0.05. Growth rates and CFU/mL were studied independently.