Table 1.
Antimicrobial activity at 15 °C by cell-free supernatant (CFS) of the tested Lp. plantarum strains against different indicator bacteria. The data (mean ± SD; n = 3) are expressed as zone of inhibition-ZOI (mm). Different lowercase letters (a–d) in each row indicate significant differences (p < 0.05).
| Indicator Strains | Lp. plantarum Strains | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 23V | 33V | 36V | 37V | 64V | 65V | 66V | 67V | 68V | 73V | |
| L. innocua | 0 ± 0 d | 0 ± 0 d | 0 ± 0 d | 0 ± 0 d | 0 ± 0 d | 0 ± 0 d | 7.1 ± 0.2 a | 5.0 ± 0.3 c | 5.5 ± 0.4 b | 5.9 ± 0.5 b |
| A. salmonicida | 7.0 ± 0.6 b | 7.0 ± 0.5 b | 7.7 ± 0.6 a | 7.5 ± 0.6 a | 8.5 ± 0.3 a | 7.3 ± 0.3 a | 6.6 ± 0.6 b | 7.5 ± 0.3 a | 8.0 ± 0.2 a | 7.7 ± 0.6 a |
| C. freundii | 7.2 ± 0.7 c | 7.2 ± 0.6 c | 8.0 ± 0.4 b | 6.4 ± 0.6 c | 9.9 ± 0.4 a | 7.0 ± 0.4 c | 10.5 ± 0.4 a | 9.0 ± 0.6 b | 10.2 ± 0.3 a | 10.3 ± 0.5 a |
| P. mirabilis | 9.2 ± 0.6 a | 7.4 ± 0.6 b | 8.3 ± 0.5 b | 9.7 ± 0.4 a | 9.5 ± 0.5 a | 9.0 ± 0.2 a | 9.6 ± 0.4 a | 10.1 ± 0.2 a | 9.5 ± 0.4 a | 7.3 ± 0.6 b |
| S. aureus | 0 ± 0 c | 0 ± 0 c | 0 ± 0 c | 0 ± 0 c | 0 ± 0 c | 0 ± 0 c | 6.5 ± 0.4 b | 7.1 ± 0.5 b | 8.9 ± 0.3 a | 6.9 ± 0.4 b |
| Ps. aeruginosa | 7.0 ± 0.3 a | 8.0 ± 0.3 a | 7.9 ± 0.6 a | 8.0 ± 0.7 a | 7.9 ± 0.6 a | 6.8 ± 0.3 a | 6.0 ± 0.1 b | 7.3 ± 0.4 a | 7.8 ± 0.4 a | 5.8 ± 0.2 b |
| E. coli | 8.8 ± 0.6 b | 9.9 ± 0.6 a | 9.6 ± 0.5 a | 10.1 ± 0.1 a | 9.8 ± 0.2 a | 6.9 ± 0.4 c | 7.0 ± 0.3 c | 7.8 ± 0.3 b | 8.9 ± 0.6 a | 7.1 ± 0.1 c |