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The prevalence of Helicobacter pylori infection varies globally according to socioeconomic factors and levels of hygiene. Investigators performed a meta-analysis of 184 studies from 1970 to 2016 to examine H. pylori prevalence in 62 different countries at different times.
Results were as follows:
More than half of the world's population is infected.
Whereas the U.S. and Australia have a low prevalence of H. pylori (35.6% and 24.6%, respectively) their indigenous populations have a high prevalence (74.8% in indigenous Alaskans and 76.0% in Western Australia indigenous populations).
The regions with the highest prevalence were Africa (70.1%), South America (69.4%), and Western Asia (66.6%); regions with the lowest prevalence were Oceana (24.4%), …