[Helicobacter pylori].

The guidelines on Helicobacter pylori (HP) have changed considerably. HP should always be considered a persistent and not a transient infection. A positive HP test should always be treated in order to prevent complications such as gastric or duodenal ulcers and gastric carcinoma. The prevalence of HP has been decreasing for many years but remains high among immigrants from many countries. Because the antimicrobial resistance situation has deteriorated significantly, we always recommend resistance testing before first-line therapy.