| Microorganism | Crude extract/inhibition halo (mm) | Chlorhexidinea | ||
| Barka | Leavesa | Flowersa | ||
| Enterococcus faecalis (ATCC 29212) | 13 ± 3 | 10 ± 1 | 15 ± 1 | 20 ± 1 |
| Escherichia coli (ATCC 25922) | 10 ± 1 | 11 ± 1 | 21 ± 1 | 20 ± 1 |
| Escherichia coli (ATCC 51446) | NIb | 10 ± 1 | 18± 1 | 20 ± 1 |
| Helicobacter pylori(ATCC 43504) | 11 ± 1 | 12 ± 1 | 19 ± 1 | 24 ± 1 |
| Klebsiella pneumoniae (ATCC 700503) | 8 ± 1 | 8 ± 1 | 13 ± 3 | 11 ± 1 |
| Klebsiella pneumoniae (ATCC 13883) | NI | NI | 12 ± 1 | 11 ± 1 |
| Lactobacillus acidophilus (ATCC 00076) | NI | NI | 15 ± 1 | 20 ± 1 |
| Proteus mirabilis (ATCC 7002) | 14± 1 | 12 ± 1 | 17 ± 1 | 9 ± 1 |
| Pseudomonas aeruginosa (ATCC 27853) | NI | NI | 19 ± 1 | 12 ± 1 |
| MRSA (ATCC 3438402) | 16 ± 1 | 15 ± 1 | 18 ±1 | 20 ± 1 |
| Salmonella choleraesuis | 15 ± 1 | 14 ± 2 | 33 ± 1 | 20 ± 1 |
| Staphylococcus aureus (ATCC 25923) | 17 ± 1 | 16 ± 1 | 22 ± 1 | 21 ± 1 |
| Streptococcus mutans (ATCC 25175) | NI | NI | 18 ± 1 | 25 ± 1 |
| Streptococcus pyogenes(ATCC 19615) | 12 ± 1 | 10 ± 1 | 16 ± 1 | 19 ± 1 |