The main cause of failure of Helicobacter pylori eradication therapy is resistance to
clarithromycin. The resistance is due to three point mutations in two positions on the 23S …

Objectives The frequency of primary clarithromycin resistance in Helicobacter pylori strains
is increasing worldwide, and its presence significantly reduces the treatment efficacy of …

Background. Helicobacter pylori (H. pylori) resistance to clarithromycin is increasing
worldwide. Data on the prevalence of H. pylori resistance are limited in Tunisia. Gap …

Introduction: Data about the prevalence of the A2142C, A2142G, and A2143G mutations in
23S rRNA gene is still limited. The aim of this study was to determine the prevalence of …

Point mutations in the 23S rRNA, gyrA, and gyrB genes can confer resistance to
clarithromycin (CAM) and levofloxacin (LVX) by altering target sites or protein structure …

Objective: This study aimed to evaluate the resistance of Helicobacter pylori (H. pylori) to
common antibiotics in Shanghai. Methods: A total of 1171 eligible subjects participated in …

Objectives The prevalence of clarithromycin (CLR)-resistant Helicobacter pylori is increasing
worldwide, including in Vietnam. The aims of this study were to determine point mutations in …

Background: Clarithromycin is a main component of the recommended first-line triple
therapy for Helicobacter pylori in Egypt. We aimed in our study to investigate the prevalence …

Although resistance of Helicobacter pylori to clarithromycin is a major cause of failure of
eradication therapies, little information is available regarding gene mutations of …

Background. Primary clarithromycin resistance markedly reduces Helicobacter pylori
eradication rate following standard therapies. Prevalence of primary clarithromycin …