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Antimicrobial effects of Lavandula stoechas L. and Rosmarinus officinalis L. extracts on Escherichia coli and Staphylococcus aureus

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Author(s): Behrooz Alizadeh Behbahani | Farideh Tabatabaei Yazdi | Fakhri Shahidi | Ali Mortazavi

Journal: Scientific Journal of Microbiology
ISSN 2322-2948

Volume: 2;
Issue: 1;
Start page: 15;
Date: 2013;
Original page

Keywords: Lavandula stoechas L. | Rosmarinus officinalis L. | Antimicrobial effects

ABSTRACT
In this study Lavandula stoechas L.and Rosmarinus officinalis L. extracted with ethanol 96° and the antimicrobial effects of extracts were evaluated on Escherichia coli PTCC 1330 and Staphylococcus aureus PTCC 1337 by “using the method of Collins” and “disk agar diffusion method”. The results show that ethanolic extract was quite effective in 2000 μg/ml concentration on Escherichia coli PTCC 1330 andStaphylococcus aureus PTCC 1337 and were prevented from growth them on medium. In “disk agar diffusion method”, 20, 40, 60 and 80 % alcoholic extract concentrations, was deterrented effect on Staphylococcus aureus PTCC 1337. TheLavandula stoechas L. and Rosmarinus officinalis L. extract presented the more effective impact on the growth of Staphylococcus aureus PTCC 1337than Escherichia coli PTCC 1330 (p
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