Helicobacter pylori (H. pylori) is a ubiquitous, microaerophilic, gram-negative, bacillus. It affects more than 50% of the population worldwide and is one of the most prevalent chronic bacterial infections. Drs. Barry Marshall and Robin Warren first isolated H. pylori in 1983. The prevalence of H. pylori varies between 19% and 88% and depends on geographical location, the patient's age, sanitation, and socioeconomic status. Patients often acquire H. pylori infection during childhood, and if untreated, persist throughout life.
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