Antimicrobial effects of aqueous extract, ethanol extract and essential oil of Golpar on Salmonella typhimurium isolated from poultry

The aim of this study was to evaluate the antimicrobial effects of aqueous extract, ethanol extract and essential oil of Golpar on Salmonella typhimurium isolates from poultry. Plant extracts and essential oils of Golpar were obtained using vacuum from the center (Rotary) and Clevenger. Total number of 12 S. typhimurium strains were isolated from native poultry in the city of Zabol. The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of aqueous and ethanol extract and essential oil of Golpar were determined using preparation of different concentrations by dilution in wells method and determination of different concentrations on growth of bacteria. Susceptibility to several antibiotics was evaluated by the Kirby-Bauer disk diffusion standard method. The results of the present study showed that among the essential oils, aqueous extract and ethanol extract of Golpar, the essence have shown highest inhibitory effect on S. typhimurium, while the aqueous extracts have less inhibitory effects on most of the strains of S. typhimurium. The MIC of essential oil was on 5 ppm dilution but for ethanol extract was on 25 ppm and for aqueous extract was on 50 and 100 ppm. The MBC for essential oil, ethanol and aqueous extracts of Golpar were 20, 200 and 200 ppm, respectively. The results showed relevant antibacterial activity of Golpar extracts and essential oils, which can be used for treatment of infections due to the S. typhimurium, instead of common antibiotics.