Abstract
This study aimed to test the effi ciency of eucalyptus extracts (aqueous and alcoholic) supplemented with zinc nanoparticles in inhibiting gram-negative and gram-positive bacteria isolated in patients and their identifi cation. The results showed the identifi cation of two gram-negative bacteria: Salmonella and Entamoeba coli. Three types of gram-positive bacteria are Staphylococcus aureus, Staphylococcus albus, Staphylococcus epidermidis The eff ect of the aqueous extract of eucalyptus on the aforementioned species was tested, as it proved highly eff ective in infl uencing the growth of gram-positive bacteria than it is with gram-negative bacteria. While the eff ect of the alcoholic extract on the growth of negative bacteria was greater than its eff ect on the gram-positive bacteria and it proved highly eff ective on E. coli compared to Salmonella. The results of the synergistic action of the above-mentioned extracts when mixed with nano-zinc, showed a signifi cant increase in the inhibition of the growth of bacterial species. Whereas the turbulent eff ect of the alcoholic extract with nano-zinc showed a signifi cant eff ect on the growth of dye-negative bacteria compared to the eff ect of the aqueous extract supplemented with nano-zinc, which gave the highest eff ect in inhibiting the growth of gram-positive bacteria.
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