Helicobacter pylori culture and antimicrobial resistance in Iran

Abstract

Helicobacter pylori is considered as an important etiologic factor in pathogenesis of peptic ulcer disease, chronic gastritis and gastric cancer. To eradicate this micro-organism, numerous regimens containing various antimicrobial agents have been suggested. However, H pylori antimicrobial resistance is a leading factor to treatment failure and recurrence of the disease. The aim of the study was to evaluate the prevalence of H pylori resistance to metronidazole, clarithromycin, tetracycline, amoxicillin, erythromycin and furazolidone in authors pediatric patients. Antral biopsy of all pediatric patients with negative history of receiving anti-H pylori regimen and endoscopic findings of nodular gastritis or peptic ulcer without previous history of NSAID consumption, burning and trauma were performed for H pylori histology, urease test and culture. All positive cultures were tested for antimicrobial susceptibility. Twenty four patients (14 male and 10 female) between 3.5 and 14 years of age were culture positive. 54.16% of the isolates were resistant to metronidazole, 8.33% to amoxicillin, 4.16% to erythromycin and 4.16% to clarithromycin. None of authors patients were resistant to tetracycline and furazolidone. H. pylori antimicrobial resistance could be a major contributor to failure of H pylori eradication. Continuous prospective surveillance of H. Pylori is essential. Moreover, culture and antimicrobial susceptibility test is recommended for resistant cases after the first failure to therapy.