The inhibitory effect of natural bioactives on the growth of pathogenic bacteria.
- Author:
Ji Sun KIM
1
;
Yangha KIM
Author Information
- Publication Type:Original Article
- Keywords: Natural bioactives; antimicrobial activity; E. coli; Salmonella typhi
- MeSH: Anti-Infective Agents; Bacteria*; Biological Products; Chickens; Chitosan; Diffusion; Escherichia coli; Food Safety; Garlic; Salmonella typhi; Salmonella typhimurium; Skin
- From:Nutrition Research and Practice 2007;1(4):273-278
- CountryRepublic of Korea
- Language:English
- Abstract: The objective of this study was to evaluate the inhibitory activity of natural products, against growth of Escherichia coli (ATCC 25922) and Salmonella typhimurium (KCCM 11862). Chitosan, epigallocatechin gallate (EGCG), and garlic were used as natural bioactives for antibacterial activity. The testing method was carried out according to the disk diffusion method. All of chitosan, EGCG, and garlic showed inhibitory effect against the growth of E. coli and Salmonella typhi. To evaluate the antibacterial activity of natural products during storage, chicken skins were inoculated with 106 of E. coli or Salmonella typhi. The inoculated chicken skins, treated with 0.5, 1, or 2% natural bioactives, were stored during 8 day at 4degrees C. The numbers of microorganisms were measured at 8 day. Both chitosan and EGCG showed significant decrease in the number of E. coli and Salmonella typhi in dose dependent manner (P < 0.05). These results suggest that natural bioactives such as chitosan, EGCG may be possible to be used as antimicrobial agents for the improvement of food safety.
