Antibacterial activities of volatile oils from menthe pieria against growth of pathogenic bacteria

الملخص EN

The study included the extraction of volatile oil from Menthe pipe Rita which was 1.3 % in the leaves and flowers.

Volatile oil of the Menthe pipe Rita leaves had special aromatic odor, pale yellow color, slightly pungent taste.

The specific gravity and refractive index were (0.9794) and (1.464) respectively.

The inhibition activity of the Menthe pipe Rita Volatile oil extracts were studied on some pathogenic microorganisms like Staphylococcus aurous, Salmonella typhi, Escherichia coli, Proteus sp, and Klebsiella pneumonia .

The result showed that the volatile oil had an inhibition effect on the growth of all microorganisms, and it gave the higher inhibition effect on the growth of S.

aurous in which the inhibition zone reached to 25 mm.

also the inhibition zoon on the growth of K.

pneumonia was 20 mm.

and it was 17 mm.

on the growth of Salmonella.

typhi, while the effect was slight on the growth of Proteus sp.

and E.

coli 12,10 mm.

respectively.

The minimum inhibition concentration (MIC) and the minimum bactericidal concentration (MBC) of the volatile oil extract of the Menthe.

pipe Rita leaves, were determined.

The value of (MIC, MBC) of Staph.

aurous was 0.625 , 1.25 % and the value for (MIC, MBC) of K.

pneumonia, Salmonella tophi were 1.25, 2.5 % for each of them, while the value of (MIC, MBC) of Proteus sp.

E.

coli were 2.5 , 5 % respectively.