Table 3.
Sensitivity testing of partitioned fractions of Parkia biglobosa stem bark extract on bacterial isolates.
| Bacterial Isolates | Zones of Inhibition (mm) at 10 mg/mL ** | |||||
|---|---|---|---|---|---|---|
| n-HEX | CHLORO | ETHYL | BUT | AQU | METH (5%) | |
| B. anthracis (LIO) | 17 ± 0.71 | 0 ± 0.00 | 10 ± 0.71 | 0 ± 0.00 | 14 ± 0.71 | 0 ± 0.00 |
| Ps. aeruginosa (NCIB 950) | 22 ± 0.71 | 0 ± 0.00 | 0 ± 0.00 | 0 ± 0.00 | 12 ± 0.71 | 0 ± 0.00 |
| B. stearothermophillus (NCIB 8222) | 14 ± 0.71 | 0 ± 0.00 | 0 ± 0.00 | 9 ± 0.00 | 14 ± 1.22 | 0 ± 0.00 |
| B. cereus (NCIB 6349) | 14 ± 0.71 | 0 ± 0.00 | 0 ± 0.00 | 0 ± 0.00 | 13 ± 0.71 | 0 ± 0.00 |
| B. polymyxa (LIO) | 14 ± 0.71 | 0 ± 0.00 | 11 ± 0.00 | 13 ± 0.89 | 15 ± 0.71 | 0 ± 0.00 |
| C. pyogenes (LIO) | 13 ± 1.48 | 0 ± 0.00 | 0 ± 0.00 | 0 ± 0.00 | 14 ± 0.00 | 0 ± 0.00 |
| Ps. Fluorescence (NCIB 3756) | 14 ± 1.00 | 0 ± 0.00 | 0 ± 0.00 | 0 ± 0.00 | 14 ± 1.00 | 0 ± 0.00 |
| C. sporogenes (NCIB 532) | 15 ± 1.48 | 0 ± 0.00 | 0 ± 0.00 | 10 ± 0.94 | 11 ± 0.00 | 0 ± 0.00 |
| M. luteus (NCIB 196) | 14 ± 0.71 | 0 ± 0.00 | 0 ± 0.00 | 0 ± 0.00 | 18 ± 0.71 | 0 ± 0.00 |
| E. faecalis (NCIB 775) | 12 ± 0.71 | 0 ± 0.00 | 0 ± 0.00 | 0 ± 0.00 | 12 ± 0.84 | 0 ± 0.00 |
| Staph. aureus (NCIB 8588) | 14 ± 0.71 | 0 ± 0.00 | 0 ± 0.00 | 0 ± 0.00 | 14 ± 0.71 | 0 ± 0.00 |
| B. subtilis (NCIB 3610) | 15 ± 1.00 | 0 ± 0.00 | 0 ± 0.00 | 0 ± 0.00 | 14 ± 0.71 | 0 ± 0.00 |
| K. pneumoniae (NCIB 418) | 14 ± 0.71 | 0 ± 0.00 | 0 ± 0.00 | 0 ± 0.00 | 14 ± 0.71 | 0 ± 0.00 |
| E. coli (NCIB 86) | 12 ± 0.71 | 0 ± 0.00 | 0 ± 0.00 | 0 ± 0.00 | 12 ± 0.71 | 0 ± 0.00 |
| P. vulgaris (LIO) | 17 ± 1.00 | 0 ± 0.00 | 0 ± 0.00 | 0 ± 0.00 | 13 ± 0.71 | 0 ± 0.00 |
Key: LIO = Locally Isolated Organism, NCIB = National Collection of Industrial Bacteriology, N-HEX = n-hexane fraction, CHLORO = Chloroform fraction, ETHYL = Ethyl acetate fraction, BUT = Butanol fraction, AQU = Aqueous fraction, METH = 5% methanol as control, (mm) ** = Mean of five replicates.