Medicinal Plant

2010, v.1(06) 24-26

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Study on Antibacterial Activity of Arnebia euchroma (Royle) Johnst and Isatis indigotica Fort Extracts in Vitro
Study on Antibacterial Activity of Arnebia euchroma (Royle) Johnst and Isatis indigotica Fort Extracts in Vitro

摘要(Abstract):

[Objective] The research aimed to study the effects of Arnebia euchroma (Royle) Johnst and Isatis indigotica Fort extracts with different concentration on the bacteriostasis and minimal inhibitory concentrations (MIC) of 6 strains food-borne microorganism and pathogenic bacteria (Escherichia coli, Salmonella typhimurium, Staphyloccocus aureus, Listeria monocytogenes, Streptococcus faecalis, Bacillus anthra). [Method] The filter paper dispersion method was used. [Result] The results showed that Arnebia euchroma (Royle) Johnst extracts had a strong inhibition on S. faecalis, L. monocytogenes, B. anthracis and S. aureus, and their minimal inhibitory concentrations(MIC) were 0.03, 0.03, 0.08 and 0.11 mg/ml, respectively. While Arnebia euchroma (Royle) Johnst extracts had a weak inhibition on S. typhimurium and E. coli. Isatis indigotica Fort extracts had a strong inhibition on S. aureus, L. monocytogenes, S. typhimurium and B. anthracis, and their MIC were 0.08, 0.20, 0.19 and 0.56 mg/ml respectively. While Isatis indigotica Fort extracts had a weak inhibition on the S. faecalis and E. coli with MIC of 1.08 and 1.16 mg/ml respectively. [Conclusion] The study can provide reference for developing and applying Arnebia euchroma (Royle) Johnst and Isatis indigotica Fort extracts as functional natural preservative.

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