TABLE 1.
Profile of S. maltophilia isolates from leafy green vegetables and hydroponic farming facilities.
| Isolates | Source | Isolation date | API 20 NE profile and significant taxa percentage | 16S rDNA sequencing confirmeda |
Antibiotics resistance statusb |
Biofilm-forming abilityc | |||
| Aztreonam | Ciprofloxacin | Norfloxacin | Sulfamethoxazole-trimethoprim | ||||||
| SM-B1 | Sweet basil | 26/09/2018 | 0472341, 99.9% | Yes | R | S | S | S | Moderate |
| SM-B2 | Sweet basil | 26/09/2018 | 1472341, 99.9% | Yes | R | S | S | S | Moderate |
| SM-B3 | Sweet basil | 08/10/2018 | 1472341, 99.9% | Yes | R | S | S | S | Strong |
| SM-B4 | Sweet basil | 08/10/2018 | 0472341, 99.9% | Yes | R | S | S | S | Weak |
| SM-K1 | Kale | 08/01/2019 | 0472341, 99.9% | S | S | S | S | Weak | |
| SM-K2 | Kale | 08/01/2019 | 0442341, 79.6% | Yes | S | S | S | S | Weak |
| SM-K3 | Kale | 08/01/2019 | 0442341, 79.6% | Yes | I | S | S | S | Moderate |
| SM-P1 | Parsley | 08/01/2019 | 1472341, 99.9% | Yes | R | S | S | S | Strong |
| SM-F1 | Hydroponic farming facility | 22/01/2019 | 0472341, 99.9% | Yes | R | S | S | S | Strong |
| SM-F2 | Hydroponic farming facility | 22/01/2019 | 0472341, 99.9% | R | S | S | S | Weak | |
| SM-F3 | Hydroponic farming facility | 22/01/2019 | 0432341, 99.9% | R | S | S | S | Moderate | |
| Reference strain | ATCC13637, clinical strain | NAd | NAd | S | S | S | S | Strong | |
aWithin 99.9% identity with NCBI-documented S. maltophilia strains; bS, susceptible; I, intermediate; R, resistant; cBiofilm-forming capacity determined from criteria established by Stepanović et al. (2007) as described in section “Materials and Methods”; results are based on the average of triplicates; dNA, not available.