The Inhibition Effect of some Plant Extracts on some Gram Negative and Gram Positive Bacteria
Rafidain Journal of Science,
2012, Volume 23, Issue 2, Pages 22-38
AbstractThe study includes detection of the antibacterial effect of aqueous and alcoholic extracts of (Glycyrrhiza glabra, Salvadora persica, Urtica dioica, Cymbopogon citrates) on bacterial isolates Staphylococcus aureus, Staphylococcus epidermides, Streptococcus, Rhodococcus, Micrococcus roseuses, Micrococcus leuteus, Alcaligenes, Proteus, Pseudomonas, E.coli, Klebsiella, Serratia, Salmonella, using the disc diffusion method. The results was compared with some standard antibiotics: Neomycin (Neo), Doxycyclin (Doxy), Ciprofloxacin (Cipro), Chloramphenicol (Chloram).
The results showed the characterization of Glycyrrhiza glabra from the other plant extracts under the study by its antibacterial effect especially on gram positive bacteria. The study didn’t show any significant difference between the antibacterial activity of alcoholic extracts compared with Neomycin, Chloramphenicol, Doxycyclin against gram positive bacteria. The extract showed better antibacterial effect than Doxycyclin, Neo. and Chloramphenicol against each of Streptococcus, Proteus and Micrococcus roseuses respectively the aqueous extracts of Siwak showed a significant difference in its antibacterial effect on Proteus compared with Neomycin and its alcoholic extracts showed no significant difference in its antibacterial activity compared with Doxycyclin and Chloramphenicol on Micrococcus roseuses, also with Doxycyclin on Streptococcus. It appeared also that there were no significant difference in the antibacterial activity of Urtica dioica alcoholic extracts in comparison with Doxycyclin and Chloramphenicol on Micrococcus roseuses, and with Chloramphenicol and Neomycin on Pseudomonas and with Cipro. on Klebsiella. The results showed no significant difference in the antibacterial activity of alcoholic extracts of Cymbopogon citrates compared with Neomycin on each of Staphylococcus aureus, Staphylococcus epidermides also with Doxycyclin and Chloramphenicol on Pseudomona and Micrococcus roseuses.
- Article View: 190
- PDF Download: 1,513