Evaluation of the antibacterial effect of Danai thyme extract on ‎Streptococcus salivarius, Yersinia enterocolitica and Shigella ‎flexneri ‎bacteria

Due to increasing resistance of pathogenetic bacteria to the new antibiotics, the researchers are seeking of finding the antimicrobial materials with herbal origins as the replacement of ineffective antibiotics. The aim of doing of this study is evalution of the antibacterial effect of hydro alcoholic extraction of the plant of thymus daensis on the bacteria of shigella flexneri, Yersinia enterocolitica and streptococcus salivarius. 

in this practical study, the plant of thymus daensis were collected and the extraction of plant were prepared by the method of maceration and the antimicrobial effects of these plant in the amounts of 0.65, 1.25, 2.5, 5 and 10 mg/l were prepared by using the method of transmission on disk on the bacteria of shigella flexneri, Yersinia enterocolitica and Streptococcus salivarius compared with the antibiotics of Penicillin, Gentamicin, Tetracycline and Vancomycin and drop of halo of lack of growth was measured. Also the minimum concentration of restraining of growth (MIC) and the minimum concentration of lethalithy (MBC) of extractions against three concerned bacteria were determined.

The obtained results showed that the extraction of thymus daensis on streptococcus salivarius in the concentration of 10mg/l had the most effect and the drop of halo of lack of growth were respectively measured as 20.83, 20.33, 19. Also this extractions didn’t have any effect on the bacterium of Yersinia for mutuol effect of antibiotic in bacterium the maximum drop of halo of lack of growth for antibiotic of Tetracycline and bacterium of Streptococcus salivarius was achived but in the mutual effect of antibiotic of Vancomycin and the bacterium of Yersinia any halo wasn’t composed. The amount of mic related to thymus daensis on the bacteria of Streptococcus salivarius and Shigella flexneri showed a similar amount the equals to 0.65 mg/l and the amount of mic related to thymus daensis on the bacterium of Yersinia enterocolitica was achieved equals to1.25 mg/l. the amount of mbc component for the plant of Thymus daensis on the bacteria of Yersinia and Shigella was achived equals to 2.5 mg/l and for bacteria of Streptococcus salivarius was achived equals to 1.25 mg/l .

There for, the hydro-alcoholic extraction of thymus daensis  has an inhibitory effect, this extractions showed more effect on the bacterium of Streptococcus than two bacteria Yersinia and Shigella.