| چکیده انگلیسی مقاله |
Objective: To study the effect of zataria multi flora Boiss essential oil, acetic acid, temperature and storage time on probable growth of salmonella typhimurium in brain heart infusion broth. Design: Multiple factorial analysis of bacterial growth. Organism: Salmonella ryphimurium. Procedure: Log probability percentage (Log P%) for growth of salmonella typhimurium was investigated in Brain Heart Infusion (BHI)broth in response to different concentration of Zataria multifiora Boiss. essential oil (0.0, 0.03 and 0.06%) and acetic acid (pH,7.4 and 6) during 43 days storage at three temperature (35, 25 and 15°C). Results: The Log P% of S. typhimurium was affected significantly (Pcz0.05)by different concentrations of essential oil, pH levels, storage temperature and their interaction. The Log P% of S. typhimurium in BHI broth (pH, 7.4) with 0% essential oil at 35, 25 and 15°C were 1.07, 1.07 and 0.41, respectively. This log P% in response to 0.03 and 0.06% essential oils were -2.93, -3.24 and - 4.23, and -4.23, -4.23 and -4.23, respectively. The Log P% of S. typhimurium in BHI broth (pH, 6) with 0% essential oil at 35, 25 and 15°C were 2, 0.76 and 1.41, respectively. This Logp% in response to 0.03 and 0.06% essential oils were -1.93, -2.59 and -4.23, and -4.93, -4.93 and -4.93,respectively. At recent conditions, growth has been completely suppressed. Food safety implication: Based on the results of this study, Zataria multifiora Boiss. essential oil can be used as a growth inhibitor for salmonella in food products. J.Fac. Vet. Med. Univ. Tehran. 61,2:135-141,2006. |