بررسي تاثير سويه هاي باكتري هاي اسيد لاكتيك بر كاهش توان كلونيزاسيون باكتري هاي انتروتوكيژنيك

The survey of the influence of Lactobacillus on colonization of entrotoxigenic bacteria

Lactobacillus is a human normal flora that suppressed the colonization of pathogenic bacteria in gastrointestinal tract. The amount of lactobacillus would decrease by assumption of antibiotics and food preservatives and this will lead to increased colonization of entrotoxigenic bacteria. The aim of this study was to survey the influence of lactobacillus on reduction of entrotoxigenic bacteria colonization power. Four pure strain of lactobacillus including L.acidophillus, L.casei, L.jansoni, L.plantarum and four genuses of entrotoxigenic bacteria including Bacillus cereus, Staphylococcus aureus, Salmunella typhimurium and E.coli were used in this study. Following the microscopic studies and confirmation of lineage pureness, the Entrotoxigenic bacteria decreases were analyzed and compared through two-layer culture, well procedure, disk diffusion, and turbidim-etry methods. The results revealed that Lactobacillus acidophilus will more effectively lead to reduction in colonization of gram positive entrotoxigenic bacteria and it will also result in severe reduction of Staphylococcus aureus colonization.