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Epidemiology and dynamic change of Helicobacter pylori infection in Chinese children

??The occurrence of Helicobacter pylori??H.pylori?? infection is significantly higher in developing countries when compared to developed nations. It is one of the most common chronic bacterial infections in China and significant geographic differences among regions are likely to present. The rates of
H.pylori infection and related diseases have been declining yearly in both developed and rapidly developing countries. A prospective??multicenter study performed recently in China indicates that H.pylori infection rate among Chinese asymptomatic children increases with age and is high after the age of ten. There is no overall regional difference among different cities. H.pylori infection rate in children has declined in Beijing in recent 20 years since 1991??which indicates that improvement in socioeconomic conditions might have helped to reduce the infection rate in children.