Table 4.
Minimal inhibitory concentrations (MICs) of plant extracts against bacterial strains.
| Bacterial Strains (ID) | Minimum Inhibitory Concentration (MIC) * | |||||
|---|---|---|---|---|---|---|
|
P. boldus (µg/mL) |
E. angustifolium (µg/mL) |
O. spinosa (µg/mL) |
P. niruri (µg/mL) |
S. virga-aurea (µg/mL) |
Ciprofloxacin (µg/mL) |
|
| Gram− | ||||||
| E. coli (ATCC 10536) | 24.80 (7.81–15.625) | 78.74 (62.5–125) | 49.60 (31.25–62.5) | 39.37 (31.25–62.5) | 78.74 (62.5–125) | <0.12 |
| E. coli (PeruMycA 2) | 39.37 (31.25–62.5) | 157.49 (125–250) | 99.21 (62.5–125) | 49.60 (31.25–62.5) | 49.60 (31.25–62.5) | 1.23 (1.95–0.98) |
| E. coli (PeruMycA 3) | 99.21 (62.5–125) | 198.42 (125–250) | 157.49 (125–250) | (≥250) | >250 | 0.62 (0.98–0.49) |
| P. aeruginosa (PeruMycA 5) | 78.74 (62.5–125) | 99.21 (62.5–125) | 49.60 (31.25–62.5) | 24.8 (15.62–31.25) | 39.37 (31.25–62.5) | 1.23 (1.95–0.98) |
| S. typhy (PeruMycA 7) | 157.49 (125–250) | 198.42 (125–250) | (≥250) | 198.42 (125–250) | (≥250) | 0.38 (0.49–0.24) |
| Gram+ | ||||||
| B. cereus (PeruMycA 4) | 78.74 (62.5–125) | 99.21 (62.5–125) | 198.42 (125–250) | 49.60 (31.25–62.5) | 78.74 (62.5–125) | <0.12 |
| B. subtilis (PeruMycA 6) | 157.49 (125–250) | 198.42 (125–250) | (≥250) | 99.21 (62.5–125) | 157.49 (125–250) | <0.12 |
| S. aureus (ATCC 6538) | 198.42 (125–250) | 198.42 (125–250) | 99.21 (62.5–125) | 78.74 (62.5–125) | 99.21 (62.5–125) | 0.62 (0.98–0.49) |
* MIC values are reported as geometric means of three independent replicates (n = 3). MIC range concentrations are reported within brackets.