The objective of this study is to isolate and characterize strains Helicobacetr pylori from gastric biopsies by upper gastrointestinal endoscopy. After a rapid urease test, two Helicobacter pylori strains isolated from four patients on blood agar. After extraction of DNA from these strains from homogenates of gastric biopsies, quantification by real-time PCR was performed to determine Helicobacter pylori on the one hand and sensitivity to clarithromycin species. Melting curve analyzes showed that these two strains are sensitive to the antibiotic.
Problem statement: Search for lactic acid bacteria that have in vitro, a significant inhibitory effect against the strains of H. pylori and to determine the inhibitory activity in vivo. Approach: The in vitro inhibitory activity of lactic acid bacteria isolated from milk against strains of H. pylori was determined by the agar diffusion method. Two groups of mice were inoculated for a week with TN2GF4. After three weeks, the infected group is treated for seven days with E. faecium (B13). H pylori was detected by a count after culture of gastric biopsy. The probiotic was determined by a count from fresh feces of mice treated. Results: Thirty strains of lactic acid bacteria were isolated and identified. E. faecium (B13) strain showed a highly significant inhibition. H. pylori was successfully detected in the gastric mucosa. E. faecium (B13) reduced the colonization in the stomach of H. pylori with a rate of 43% in a week. Conclusion: E. faecium (B13) has in vitro and in vivo an inhibitory effect against H. pylori.
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