In vitro study of the inhibitory  effect of  Thymus vulgaris  oily extract on  Escherichia coli, Salmonella entritidis  , Staphylococcus aureus, Streptococcus bovis bacteria

Y. Al-Chalaby, A.

	In vitro study of the inhibitory effect of Thymus vulgaris oily extract on Escherichia coli, Salmonella entritidis , Staphylococcus aureus, Streptococcus bovis bacteria
Tikrit Journal of Pure Science
Article 1, Volume 14, Issue 3, 2009, Pages 219-225
Author
A. Y. Al-Chalaby
Abstract
The results of this study for inhibitory activity of Thymus vulgaris oil extract for Escherichia coli , Salmonella entritidis , Staphylococcus aureus, Streptococcus bovis by using turbidity test (measurement of light density) showed decreases of light density of bacterial growth from 0.760, 1.179,0.185 and0.193 to 0.190, 0.138, 0.050 and 0.075 at dilution 1:10 for Escherichia coli , Salmonella entritidis , Staphylococcus aureus, Streptococcus bovis, respectively. Also this study showed that the minimum inhibitory concentration of these bacteria were 0.060 at the dilution 1:50 , 0.045 at dilution 1:45 , 0.022 at dilution 1:45 too and 0.030 at the dilution 1:50 to the Escherichia coli , Salmonella entritidis , Staphylococcus aureus, Streptococcus bovis,. respectively The result of disc diffusion test showed that the inhibitory zone for the Escherichia coli at the dilution 1:10 (37mm) this result showed strong inhibitory effect of the extract and this inhibitory effect continued until the dilution 1:35 in comparison of antibiotic cephalixine. The zone of inhibition for Salmonella entritidis , Staphylococcus aureus, Streptococcus bovis were35mm, 40mm, 36mm respectively at the same dilution and this inhibitory effect continued to several dilutions in comparison with the antibiotic (cephalixine and ampicilin)

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