Fig. 1.

Worldwide prevalence of Helicobacter pylori infection. The map shows the prevalence of H. pylori infection in different parts of the world. Note, the particularly high prevalence in sub-Saharan Africa, Latin America and the Middle East. Australasia, Switzerland, and more generally North America and Western Europe have the lowest incidence of H. pylori infection. Data derived from Asfeldt et al., 2008; Ben Mansour et al., 2016; Laszewicz et al., 2014; Luzza et al., 2014; McDonald et al., 2015; Peleteiro et al., 2014; Saltanova, 2001; Sanchez Ceballos et al., 2007; van Blankenstein et al., 2013.