Table 2.
Phenotypic characterization of strains used in this study
| Strain | Species | Relative growth, at day 21 (6°C) 1 | Relative proteolysis on Skim Milk Agar (24 h 32°C) | β-gal activity | Antimicrobial resistance pattern 3 |
|---|---|---|---|---|---|
| FSL R5-860 |
Bacillus sp. |
- |
+ |
- |
Lincomycin, Penicillin |
| FSL H7-687 |
Bacillus weihenstephanensis |
++ |
+ |
- |
Lincomycin, Penicillin |
| FSL R5-213 |
Viridibacillus arenosi |
++ |
- 2 |
- |
Lincomycin |
| FSL H8-237 |
Paenibacillus odorifer |
++ |
+ |
+ |
Not tested4 |
| FSL R7-277 |
Paenibacillus sp. |
+ |
+ |
+ |
Streptomycin |
| FSL R7-269 |
Paenibacillus sp. |
+ |
+ |
+ |
Streptomycin |
| FSL R5-192 |
Paenibacillus amylolyticus |
- |
+ |
+ |
Lincomycin, Streptomycin |
| FSL H7-689 |
Paenibacillus amylolyticus |
++ |
+ |
+ |
Pansusceptible |
| FSL R5-808 |
Paenibacillus glucanolyticus |
- |
- |
+ |
Lincomycin, Penicillin |
| FSL H8-457 | Paenibacillus lautus | - | - | + | Lincomycin, Penicillin |
1Relative growth in skim milk broth, plated on BHI at day 21 of shelf life (storaged at 6°C): (−) <1 log cfu/mL, (+) 1–6 log cfu/mL, (++) >6 log cfu/mL.
2Isolate produced pinkish coloration of Skim Milk Agar.
3Isolates were tested for susceptibility against 16 antimicrobials included in the Gram positive NARMS panel (see Methods).
4Strain was considered too fastidious for susceptible testing.