Antibacterial activity of ginger extracts and its essential oil on some of pathogenic bacteria

Abstract EN

The antimicrobial activity of ginger extracts (cold-water, hot-water, ethanol and essential oil) against some of pathogenic bacteria (Escherichia coli, Salmonella sp.

Klebsiella sp.

Serration marcescens, Vibrio cholerae, Staphylococcus aurous, Streptococcus sp.) was investigated using Disc diffusion method, and the results were compared with the antimicrobial activity of 12 antibiotics on the same bacteria.

The results showed that the ginger extracts were more effective on gram-positive bacteria than gram-negative.

V.

cholerae and S.

marcescens, were the most resistant bacteria to the extracts used, while highest inhibition was noticed against Streptococcus sp.

(28 mm).

The ethanolic extract showed the broadest antibacterial activity (11 to 28 mm), in comparison with moderate activity of essential oil, it was observed that the cold-water extract was more effective on the bacteria than hot-water extract.

Ginger ethanol extract presented higher diameter of inhibition zone for Streptococcus sp.

than in Ciprofloxacin, Cefotaxime, Cefalotin, Cephalexin and Cephaloridine, also it was found a similarity between the higher inhibition zones of ethanol extract of ginger and some antibiotics for S.

aurous , E.

coli , Salmonella sp.

and Klebsiella sp.

V.

cholera and S.

marcescens, also highly resistant to antibiotics.

Phytochemical analysis of ethanolic extract of ginger revealed the present of glycosides, terpenoids, flavonoids and phenolic compounds.