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  • Title: The Lactobacillus plantarum strain ACA-DC287 isolated from a Greek cheese demonstrates antagonistic activity in vitro and in vivo against Salmonella enterica serovar Typhimurium.
    Author: Fayol-Messaoudi D, Coconnier-Polter MH, Moal VL, Atassi F, Berger CN, Servin AL.
    Journal: J Appl Microbiol; 2007 Sep; 103(3):657-65. PubMed ID: 17714399.
    Abstract:
    AIMS: The purpose of this study was to investigate the antibacterial activity of the Xynotyri cheese isolate Lactobacillus plantarum ACA-DC287 using a set of in vitro and in vivo assays. METHODS AND RESULTS: The co-culture of L. plantarum strain ACA-DC287 and Salmonella enterica serovar Typhimurium strain SL1344 results in the killing of the pathogen. The killing activity was produced mainly by non-lactic acid molecule(s) that were present in the cell-free culture supernatant of the L. plantarum strain ACA-DC287. The culture of the L. plantarum strain ACA-DC287 inhibited the penetration of S. typhimurium SL1344 into cultured human enterocyte-like Caco-2/TC7 cells. In conventional mice infected with S. typhimurium SL1344, the intake of L. plantarum strain ACA-DC287 results in a decrease in the levels of Salmonella associated with intestinal tissues or those present in the intestinal contents. In germ-free mice, the L. plantarum strain ACA-DC287 colonized the gastrointestinal tract. CONCLUSIONS: The L. plantarum strain ACA-DC287 strain exerts anti-Salmonella activity similar that of the established probiotic strains Lactobacillus rhamnosus GG, Lactobacillus casei Shirota YIT9029 and Lactobacillus johnsonii La1. SIGNIFICANCE AND IMPACT OF THE STUDY: The observation that a selected cheese Lactobacillus strain exerted antibacterial activity that was similar to those of probiotic Lactobacillus strains, is of interest for the use of this strain as an adjunct strain for the production of health-giving cheeses.
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