Lactobacillus fermentum improved intestinal bacteria flora by reducing Clostridium perfringens

Summary Background & aim Supplementation with probiotic Bifidobacteria or Lactobacilli or the combination of both, has been shown to maintain a healthy balance of bacterial flora in the intestinal lumen. A placebo-controlled, crossover, self-comparing clinical study evaluated the probiotic effects of Lactobacillus fermentum P.C.C. (ProBioPCC) on gastrointestinal bacterial flora. Methods This 8-week trial comprised an initial lead-in week with no study intervention, a 3-week treatment phase (taking ProBio, 1 capsule/day), a 1-week washout phase, a 3-week control phase (taking placebo, 1 capsule/day), followed by a final week of washout. Thirty healthy adults (age: 25–43 years) having no gastrointestinal diseases were recruited into the study. Stool samples were collected once at each experimental week, and cultured for counting colonies of total anaerobic bacteria, Lactobacillus spp., Bifidobacterium spp., and Clostridium perfringens . Results We found significantly increased colony counts of Lactobacillus spp. In stool samples after the treatment phase ( p Bifidobacterium spp. were significantly increased with the study intervention ( p C. perfringens were reduced ( p Bifidobacterium spp. to total anaerobic bacteria and to C . perfringes were increased significantly ( p L . fermentum P.C.C. strain was resistant against simulated gastric acid and bile in vitro . Conclusions Our data indicate that ProBioPCC is effective in decreasing C. perfringens and increasing ratio of Bifidobacterium spp. to total anaerobic bacteria in healthy humans.