genetic and molecular aspects of helicobacter pylori in gastritis, pre- cancerous conditions and gastric adenocrcinoma

aim: the aim of this study was to evaluate the helicobacter pylori eradication in the group receiving standard -dose twice a day for two weeks and continue taking amoxicillin for 4 weeks. background: helicobacter pylori is the major etiological cause of chronic gastritis, gastric and duodenal ulcers, gastric cancer and lymphoma and therefore, patient should be treated after diagnosis of h. pylori infection. patients and method: a total of 66 consecutive patients with rapid urease test during endoscopy or biopsy positive for h. pylori were enrolled in this clinical trial study during 2013-2014. patients were divided randomly into two groups. group a (standard dose) received omeprazole (20 mg), amoxicillin (1 g), and clarithromycin (500 mg), all twice daily for two weeks. group b received standard dose like group a and in patients with h.pylori infection but amoxicillin were continued for 4 weeks. after completion of treatment, patients did not receive any treatment for a month and then stool antigen was performed to evaluate the h.pylori . results: the rate of successful hp eradication was significantly higher in group a (90.9% v.s 63.6%; p=0.017). inflation and bitter mouth were found in 8 and 13 patients in group a and 7 and 9 patients in group b, respectively. the incidence of adverse effects was the same (p=0.437). conclusion: increased duration of antibiotic therapy for more two weeks, significantly raises the rate of successful hp eradication with standard triple therapy without significant increase in adverse effects.