Table 2.
The antagonistic activities of the cell-free culture supernatants of fecal lactobacilli against various pathogenic and commensal indicator strains.
| Indicator strains | Zones of inhibition (mm) ± S.D. | ||||||
|---|---|---|---|---|---|---|---|
| L13 | L14 | L18 | L32 | S30 | S45 | S49 | |
| V. cholerae | 20 ± 0.3 | 16 ± 0.1 | 24 ± 0.3 | 18 ± 0.2 | 26 ± 0.2 | 19 ± 0.2 | 18 ± 0.2 |
| S. enterica | 11 ± 0.1 | 11 ± 0.2 | 6 ± 0.2 | 12 ± 0.1 | 9 ± 0.1 | 8 ± 0.2 | 9 ± 0.1 |
| E. coli | 11 ± 0.2 | 12 ± 0.2 | 9 ± 0.1 | 14 ± 0.3 | 12 ± 0.2 | 6 ± 0.1 | 9 ± 0.2 |
| St. aureus | – | – | – | – | 20 ± 0.2 | 22 ± 0.2 | 19 ± 0.1 |
| L. monocytogenes | 24 ± 0.3 | – | 25 ± 0.2 | – | 18 ± 0.1 | 23 ± 0.3 | 17 ± 0.1 |
| Sh. flexeri | 10 ± 0.1 | 14 ± 0.2 | 0.8 ± 0.1 | – | 10 ± 0.2 | – | – |
| V. parahaemolyticus | – | – | – | – | – | – | – |
| Candida spp. | – | – | – | – | – | – | – |
| Lactobacillus L13 | ND | – | – | – | – | – | – |
| Lactobacillus L14 | – | ND | – | – | – | – | – |
| Lactobacillus L18 | – | – | ND | – | – | – | – |
| Lactobacillus L32 | – | – | – | ND | – | – | – |
| Lactobacillus S30 | – | – | – | – | ND | – | – |
| Lactobacillus S45 | – | – | – | – | – | ND | – |
| Lactobacillus S49 | – | – | – | – | – | – | ND |
ND: Not Done, –: No zone of inhibition, The CS of lactobacilli isolates without pH neutralization were tested for the antimicrobial activities by using agar-gel diffusion assay. The experiment was performed three times in triplicate. The results are expressed as the means ± standard deviations.