| Microorganism | Crude extract (mg/mL) | ||
| Flowers | Leaves | Bark | |
| Escherichia coli (ATCC 25922) | 1.25 ± 1 | 20 ± 1 | 20 ± 1 |
| Escherichia coli (ATCC 51446) | 1.25 ± 1 | 10 ± 1 | NR |
| Enterococcus faecalis (ATCC 29212) | 10 ± 1 | 20 ± 1 | 20 ± 1 |
| Helicobacter pylori (ATCC 43504) | 5 ± 1 | 20 ± 1 | 10 ± 1 |
| Klebsiella pneumoniae (ATCC 13883) | 20 ± 1 | NP* | NP |
| Klebsiella pneumoniae (ATCC 700503) | 20 ± 1 | NP | NP |
| Lactobacillus acidophilus (ATCC 4356) | 5 ± 1 | NP | NP |
| Pseudomonas aeruginosa (ATCC 27853) | 1.25 ± 1 | NP | NP |
| Proteus mirabilis (ATCC 7002) | 20 ± 1 | 20 ± 1 | 20 ± 1 |
| Staphylococcus aureus (ATCC 25923) | 10 ± 1 | 10 ± 1 | 20 ± 1 |
| MRSA (ATCC 3438402) | 2.5 ± 1 | 10 ± 1 | 5 ± 1 |
| Streptococcus mutans (ATCC 25175) | 2.5 ± 1 | NP | NP |
| Streptococcus pyogenes(ATCC 19615) | 5 ± 1 | NP | 5 ± 1 |
| Salmonella choleraesuis | 0.625 ± 0 | 5 ± 1 | 5 ± 1 |