Antimicrobial Activity of Hwangryunheadok-tang and Extracts of Scutellariae Radix, Phellodendri Cortex, Coptis Rhizome, and Gardenia Jasminoides against Salmonella Typhimurium

Objectives: This experiment investigated the antimicrobial activity of Hwangryunheadok-tang and extracts of Scutellariae radix , Phellodendri cortex , Coptis rhizome , and Gardenia jasminoides against Salmonella typhimurium . Methods: After spreading S. typhimurium on a bacterial culture medium plate, antimicrobial activity was tested by dripping diluted Hwangryunheadok-tang or extracts of Scutellariae radix , Phellodendri cortex , Coptis rhizome , or Gardenia jasminoides (80 μl, diluted 100, 50, 10, and 1%) onto the plate, followed by culture for 16 to 72 hours. The minimal inhibitory concentration (MIC) was tested by dripping the minimum dilution that showed antimicrobial activity (80, 60, 40, and 20 μl) and measuring the density. The antimicrobial activity of Hwangryunheadok-tang and four extracts showed continuous antibacterial activity against S. typhimurium throughout the experiment. Result: 1. S. typhimurium . (Standard Microorganism, ATCC) 1) The Hwangryunheadok-tang and extracts of Scutellariae radix , Phellodendri cortex , and Coptis rhizome showed antibacterial activity in the undiluted solutions and in 50% dilutions. Gardenia jasminoides extract showed potency only in the undiluted solution. The antimicrobial potency of the undiluted solution was increased when the volume of inoculation was increased, but no difference was noted when the culture time was extended. All the extracts showed antimicrobial potency against S. typhimurium . 2. S. typhimurium isolated from diarrhea patients 1) When compared to the standard microorganism experiment on S. typhimurium , the MICs of the five extracts were increased. However, whereas the antimicrobial potency of doxycycline was lost entirely against bacteria isolated from patients with diarrhea, the antimicrobial potency of all the extracts was diminished but did not disappear. 2) The antimicrobial activity of Hwangryunheadok-tang and four extracts was continuous even when the culture time was extended to 16, 24, and 72 hours. Conclusions: The Hwangryunheadok-tang and four kinds of extracts have antimicrobial activity against S. typhimurium . Comparison of a standard microorganism with S. typhimurium isolated from diarrhea patients showed that the antimicrobial activity of all the extracts was better than that of antibiotics. Further studies should focus on the value and benefits of Hwangryunheadok-tang , and the four kinds of extracts as clinical treatments.

黃連解毒湯, 黃連, 黃芩, 黃柏, 梔子의 Salmonella Typhimurium에 대한 항균효과