Inhibiting Effect of Three Nature Products on Biofilm Formation

Abstract:

To find an effective way to eliminate biofilm,we researched the minimum inhibitory concentration(MIC) of teapolyphenols citral and cinnamaldehyde against Staphylococcus aureus, Salmonella enteritidis and Escherichia coli were determined by dilution method. Also,the effect of the three nature products on biofilm formation and AI-2 activity of Staphylococcus aureus, Salmonella enteritidis,E.coli and the mixed biofilm of all these three isolates were tested by microtiter-plate method at the subinhibitory concentration.The results indicated that teapolyphenols was the most effective product to inhibit the biofilm formation of Staphylococcus aureus and cinnamaldehyde had the most effective on the biofilm formation of E.coli and Salmonella at the subMIC,. Besides,citral could inhibit the AI-2 activity of all isolates.