Failed Eradication for Helicobacter pylori. What Should Be Done?

Area of Science:

• Gastroenterology
• Infectious Diseases
• Pharmacology

Background:

• Antibiotic resistance, particularly to clarithromycin, is a primary cause of failed Helicobacter pylori eradication.
• Sub-inhibitory antibiotic concentrations at the infection site lead to treatment failure.

Purpose of the Study:

• To outline rational therapeutic strategies for Helicobacter pylori eradication in the context of antibiotic resistance.
• To evaluate alternative treatment regimens when standard therapies fail.

Main Methods:

• Review of current treatment guidelines and emerging therapeutic options for H. pylori infection.
• Analysis of strategies including tailored therapy, bismuth-based quadruple therapy, and dual therapy (proton pump inhibitor-amoxicillin).

Main Results:

• Tailored therapy, guided by clarithromycin susceptibility testing (culture/antibiogram or molecular methods), is the most rational approach.
• Bismuth-based quadruple therapy is a recommended alternative for resistant cases or empiric treatment.
• Revisited dual therapy with optimized proton pump inhibitor-amoxicillin dosing shows excellent efficacy, particularly in the Far East.

Conclusions:

• Antibiotic resistance necessitates a shift from standard triple therapy to more robust regimens.
• Testing for clarithromycin resistance is crucial for guiding effective H. pylori eradication strategies.
• Optimized dual therapy presents a promising alternative, potentially reducing costs and adverse events associated with clarithromycin-containing regimens.