What is the prevalence of chronic gastritis in the US?

Updated: Jun 07, 2019
  • Author: Akiva J Marcus, MD, PhD; Chief Editor: BS Anand, MD  more...
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H pylori is one of the most prevalent bacterial pathogens in humans, and in the United States approximately 30%-35% of adults are infected, but the prevalence of infection in minority groups and immigrants from developing countries is much higher. H pylori prevalence is higher in Hispanics (52%) and black individuals (54%), in contrast to white persons (21%). Overall, the prevalence of H pylori is higher in developing countries and declining in the United States. The incidence of new infections in developing countries ranges from 3%-10% of the population each year, compared to 0.5%in developed countries. Children aged 2-8 years in developing nations acquire the infection at a rate of about 10% per year, whereas in the United States, children become infected at a rate of less than 1% per year. This major difference in the rate of acquisition in childhood is responsible for the differences in the epidemiology between developed countries and developing countries. [19, 57, 58, 59, 60, 61, 62]

Socioeconomic differences are the most important predictor of the prevalence of the infection in any group. Higher standards of living are associated with higher levels of education and better sanitation, thus the prevalence of infection is lower. Epidemiologic studies of H pylori-associated chronic gastritis have shown that the acquisition of the infection is associated with large, crowded households and lower socioeconomic status. [63, 64]

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