Helicobacter pylori infection

What it means

A recurrent infection of the GI tract with helicobacter pylori, a gram-negative, microaerophilic bacterium usually found in the stomach.

The bacterial pathogen Helicobacter pylori has co-evolved with humans and colonizes approximately half of the human population, but only causes overt gastric disease in a subset of infected hosts.

Rare diseases that can present with this3

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category