The goal of this clinical trial is to learn if a modified bismuth-containing therapy for the treatment of helicobacter pylori infection works to treat chronic helicobacter pylori related gastritis in adults treated either for first time or after a previous failure of another helicbacter erdication therapy. It will also learn about the safety and compliance of the modified bismuth containing therapy for helicobacter pylori. The main questions it aims to answer are: Does the modified bismuth-containing therapy for helicobacter pylori maintains a high eradication profile? What medical problems do participants have when taking the bismuth containing therapy? Researchers will present the eradication percentage of the modified bismuth containing therapy for helicobacter pylori in a difficult to treat population with a high profile of resistance to antibiotics for the treatment of helicobacter pylori separately for first time treated patients or patients with previous failures of other therapies. Participants will: Take the modified bismuth containing therapy which consists of four different medications (esomeprazole, amoxicillin, metronidazole, bismuth subcitrate) taken for 14 days in selected timepoints. Visit the clinic at the end of therapy for checkups and at 6 to 8 weeks after the end of therapy for final evaluation of completed eradication. Keep a diary of their symptoms and the number of medications taken.
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Effectiveness to eradicate helicobacter pylori with modified bismuth-containing treatment
Timeframe: From enrollment to the end of treatment and assessment of eradication results at 8-10 weeks