| Concentration of extract | Optical density 600 nm | |||
| E. coli | E. coli control | L. gasseri | L. gasseri Control | |
| 2 × 10−3 | 0.322 ± 0.058d | 0.932 ± 0.107ab | 0.459 ± 0.074fd | 0.852 ± 0.067abc |
| 1 × 10−3 | 0.61 ± 0.087c | 0.971 ± 0.056ab | 0.668 ± 0.197cd | 1.14 ± 0.038a |
| 5 × 10−4 | 0.75 ± 0.046bc | 1.106 ± 0.125a | 0.648 ± 0.072cd | 0.94 ± 0.119abc |
| 2.5 × 10−4 | 0.653 ± 0.114c | 1.088 ± 0.103a | 0.77 ± 0.139bc | 1.072 ± 0.046ab |