Table 3. Antimicrobial activity of short-listed isolates against 14 indicators strains.
The antimicrobial activities were evaluated by well diffusion assay (WD) and cross streak assay (CS).
| #01 | #02 | #03 | #04 | #05 | #06 | #07 | #08 | #09 | #10 | #11 | #12 | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CS | WD | CS | WD | CS | WD | CS | WD | CS | WD | CS | WD | CS | WD | CS | WD | CS | WD | CS | WD | CS | WD | CS | WD | |
| Clostridium perfringens | ++ | ++ | ++ | + | – | – | + | + | ++ | +++ | ++ | ++ | – | – | +++ | ++ | – | – | + | + | +++ | ++ | ++ | + |
| Staphylococcus aureus | +++ | ++ | ++ | – | + | – | – | – | + | + | +++ | – | – | – | +++ | – | – | – | ++ | ++ | ++ | – | ++ | – |
| Bacillus cereus | ++ | ++ | ++ | ++ | – | – | + | – | + | ++ | +++ | ++ | – | – | +++ | +++ | ++ | – | + | + | +++ | ++ | + | + |
| Listeria monocytogenes | ++ | ++ | ++ | + | – | – | + | – | – | – | +++ | ++ | + | – | ++ | + | – | – | – | – | ++ | + | – | – |
| Lactobacillus plantarum | ++ | + | + | + | + | + | – | – | – | – | ++ | ++ | – | – | ++ | ++ | – | – | + | + | ++ | ++ | – | – |
| Candida albicans | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | - | – | – | – |
| Escherichia coli | + | – | + | – | – | – | – | – | + | – | – | – | – | – | + | + | – | – | – | – | + | + | + | – |
| Salmonella Enteritidis | + | – | – | – | – | – | – | – | – | ++ | – | + | – | ++ | + | – | – | – | – | ++ | + | + | – | |
| Campylobacter jejuni | ++ | + | ++ | + | – | – | – | – | ++ | – | ++ | ++ | + | – | ++ | ++ | – | – | – | – | +++ | ++ | – | – |
| Campylobacter coli | + | +++ | ++ | ++ | – | – | ++ | +++ | + | – | + | +++ | + | – | + | +++ | – | – | – | – | ++ | +++ | ++ | ++ |
| Pseudomonas aeruginosa | – | – | – | – | – | – | – | – | + | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| MRSA | +++ | ++ | ++ | – | + | – | – | – | + | + | +++ | – | – | – | +++ | – | – | – | ++ | ++ | ++ | – | ++ | – |
| VRE | ++ | ++ | ++ | ++ | – | – | + | + | – | – | + | – | – | – | +++ | +++ | – | – | ++ | ++ | ++ | ++ | + | ++ |
| MRKP | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
Notes.
+
zone of inhibition observed with clear halo of growth inhibition in at least one time point
++ and +++
increased activity as assessed visually by the increased diameter of the inhibition zone
-
no inhibition
The percentage values were calculated based on the ratio between number of isolates with antimicrobial activity against the indicator strain and the total 23 isolates tested.