Table 3 Gallic acid MIC, MBC, and MIC/MBC ratio effect on pathogenic bacterial strains after incubation at 37 °C for 24 h.
Parameters | Pathogenic bacterial strains | ||||||||
|---|---|---|---|---|---|---|---|---|---|
Gallic acid concs. (µg/mL) | S. sonnei DSM 5570 | P. aeruginosa ATCC27853 | K. pneumoniae ATCC00607 | S. typhi DSM17058 | E. faecalis ATCC7080 | E. coli ATCC8739 | B. cereus ATCC11778 | Spectrum Activity (%) | |
7770.0 (Control) | − | − | − | − | − | − | − | 7/7 | 100 |
3885.0 | − | − | − | − | − | − | − | 7/7 | 100 |
1942.5 | − | − | − | − | − | − | − | 7/7 | 100 |
971.25 | − | + | − | − | − | − | − | 6/7 | 85.7 |
485.63 | − | + | − | − | − | − | + | 5/7 | 71.4 |
242.81 | − | + | − | − | − | − | + | 5/7 | 71.4 |
121.41 | + | + | + | + | + | + | + | 0/7 | 0 |
MIC value (µg/mL) | 49.38 | 395 | 49.38 | 49.38 | 49.38 | 49.38 | 197.5 | ||
MBC (µg/mL) | |||||||||
7770.0 (Control) | − | − | − | − | − | − | − | 7/7 | 100 |
3885.0 | − | − | − | − | − | − | − | 7/7 | 100 |
1942.5 | − | + | − | − | − | − | + | 5/7 | 71.4 |
971.25 | + | + | − | + | − | − | + | 4/7 | 57.1 |
485.63 | + | + | − | + | − | + | + | 3/7 | 42.8 |
242.81 | + | + | + | + | + | + | + | 0/7 | 0 |
MBC value (µg/mL) | 197.5 | 395 | 49.38 | 197.5 | 49.38 | 98.75 | 395 | ||
MBC/MIC Ratio | 3.99 | 1 | 1 | 3.99 | 1 | 1.99 | 2 | ||
Effect | Bacteriostatic | Bactericidal | Bactericidal | Bacteriostatic | Bactericidal | Bactericidal | Bactericidal | ||
