Strain | Decrease in cell count (log_{10}CFU/ml) with penicillin concn of^{a}: | ||
---|---|---|---|

2 μg/ml | 5 μg/ml | 10 μg/ml | |

OG1RF | 0.75 ± 0.11 | 3.96 ± 0.16 | 3.62 ± 0.18 |

TX5127 | 0.18 ± 0.08^{b} | 3.36 ± 0.13^{c} | 3.03 ± 0.08^{d} |

↵a Initial inocula were about 10

^{7}CFU/ml. Data are expressed as mean (log_{10}CFU per ml at 24 h of growth without penicillin −log_{10}CFU per milliliter at 24 h of growth with penicillin) ± standard deviation (n = 6).↵b P < 0.001 versus OG1RF by Student’s two-tailed t test.

↵c P = 0.03 versus OG1RF by Student’s two-tailed t test.

↵d P = 0.04 versus OG1RF by Student’s two-tailed t test.