Journal
LETTERS IN APPLIED MICROBIOLOGY
Volume 56, Issue 4, Pages 307-313Publisher
WILEY
DOI: 10.1111/lam.12051
Keywords
auto-aggregation; biofilm; competition; displacement; exclusion; hydrophobicity; probiotic
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Funding
- Kangwon National University
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The objective of this study was to examine the inhibitory effect of probiotic strains on pathogenic biofilm formation in terms of competition, exclusion and displacement. Probiotic strains (Lactobacillus acidophilus KACC 12419, Lact.casei KACC 12413, Lact.paracasei KACC 12427 and Lact.rhamnosus KACC 11953) and pathogens (Salmonella Typhimurium KCCM 40253 and Listeria monocytogenes KACC 12671) were used to evaluate the auto-aggregation, hydrophobicity and biofilm formation inhibition. The highest auto-aggregation abilities were observed in Lact.rhamnosus (17 center dot 5%), Lact.casei (17 center dot 2%) and Lact.acidophilus (15 center dot 1%). Salm.Typhimurium had the highest affinity to xylene, showing the hydrophobicity of 53 center dot 7%. The numbers of L.monocytogenes biofilm cells during the competition, exclusion and displacement assays were effectively reduced by more than 3 log when co-cultured with Lact.paracasei and Lact.rhamnosus. The results suggest that probiotic strains can be used as alternative way to effectively reduce the biofilm formation in pathogenic bacteria through competition, exclusion and displacement.
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