Yes/yes: H. pylori is acquired by much of the population by age 5 & remains in their system as a passive germ for most throughout life. The subset of the population that gets related gastritis & ulcers is older, when lifestyle & dietary choices make them more vulnerable.
Answered 8/20/2019
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Age dependent risks: The carcinogenic effect of H. pylori is considered to be age-dependent. H. pylori infection early in life predisposes patients to gastric cancer. In contrast, acquisition of infection later in life leads to development of duodenal ulcer. As regards above,Confirming the importance of adult-child transmission, seroconversion only occurred among children living with H. pylori-positive mothers.
Answered 8/17/2019
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