Table 4. Comparison of antimicrobial activity according to the concentration (50 mg/mL or 200 mg/mL) of natural extracts against Listeria monocytogenes, Clostridium perfringens, Salmonella spp. and Escherichia coli (unit: mm)
| No. of natural extracts | Ethanol extraction (50 mg/mL) | Ethanol extraction (200 mg/mL) |
| LM | CP | SAL | EC | LM | CP | SAL | EC |
| 4 | - | 9.0 | - | - | 6.5 | 10.0 | - | 7.0 |
| 16 | - | 16.0 | - | - | - | 19.5 | - | - |
| 23 | - | 16.5 | 6.0 | 3.0 | 10.5 | 10.0 | 12.0 | 10.5 |
| 25 | - | 7.0 | - | - | - | - | - | - |
| 27 | 8.0 | 9.5 | 7.0 | 7.0 | - | - | 10.0 | - |
| 31 | 10.0 | - | 7.5 | 6.5 | - | - | 10.0 | 9.5 |
| 32 | 14.0 | 16.0 | 15.5 | 14.0 | 18.0 | 23.5 | 19.0 | 19.5 |
| 36 | 10.0 | 9.0 | 9.5 | 11.0 | 12.5 | 15.5 | 18.5 | 14.5 |
| 40 | - | 10.0 | - | - | - | 16.0 | - | - |
| 42 | - | 17.0 | - | - | - | - | - | - |
| 45 | - | 13.0 | - | - | - | 17.0 | - | - |
| 47 | - | 13.0 | - | - | - | - | - | - |
| 48 | - | 10.0 | - | - | - | 17.0 | - | - |
All values were presented by mean of three replicates.
LM, Listeria monocytogenes; CP, Clostridium perfringens; SAL, Salmonella spp.; EC, Escherichia coli.