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[Helicobacter pylori: virulence factors, resistance and diagnosis]
1Klinische Abteilung für Klinische Mikrobiologie, Klinisches Institut für Hygiene, Universität Wien, Währinger Gürtel 18-20/5P, A-1090 Wien. alexander.hirschl@akh-wien.ac.at
Abstract:
Helicobacter pylori disposes of various virulence factors such as urease, vacuolating cytotoxin and the cag-pathogenicity island which--though not alone, but possibly in conjunction with host-specific factors--may explain the varying course of the infection (asymptomatic, dyspepsia, ulcer, distal gastric carcinoma). Increasing resistance to macrolide antibiotics and the lack of new therapeutic approaches makes treatment of the infection increasingly difficult. The resultant call for a strict indication for treatment is in obvious contrast to the finding that Helicobacter pylori represents the major risk factor for gastric carcinoma and eradication would therefore be absolutely desirable. Increased use of culture and susceptibility testing would be desirable for the purpose of therapy optimization but also for reasons of resistance epidemiology. The indication for diagnostic screening should be guided by the treatment indications as proposed by the guidelines of the Maastricht Consensus Conference 2-2000. In addition--and regardless of clinical picture--therapeutic follow-up primarily relying on non-invasive tests (13C urea breath test, stool antigen test) should be a matter of course.
Insights
Helicobacter pylori infection is a major risk factor for gastric cancer, necessitating eradication despite rising antibiotic resistance. Optimizing treatment through culture and susceptibility testing is crucial for managing this difficult-to-treat infection.
Area of Science:
- Gastroenterology
- Microbiology
- Oncology
Background:
- Helicobacter pylori possesses virulence factors like urease and cag-pathogenicity island, contributing to varied infection outcomes from asymptomatic to gastric carcinoma.
- Increasing macrolide antibiotic resistance and limited new therapies complicate H. pylori eradication.
- H. pylori is a primary risk factor for gastric cancer, making eradication highly desirable.
Purpose of the Study:
- To highlight the challenges in H. pylori treatment due to antibiotic resistance.
- To emphasize the need for H. pylori eradication given its link to gastric cancer.
- To advocate for improved diagnostic and therapeutic strategies.
Main Methods:
- Review of virulence factors and their role in disease progression.
- Analysis of current treatment challenges and antibiotic resistance trends.
- Discussion of diagnostic and follow-up testing recommendations.
Main Results:
- Helicobacter pylori infection is a significant risk factor for distal gastric carcinoma.
- Antibiotic resistance is increasing, complicating treatment efficacy.
- Culture and susceptibility testing are recommended for therapy optimization and resistance epidemiology.
Conclusions:
- Eradication of H. pylori is highly desirable due to its oncogenic potential.
- Increased use of culture and susceptibility testing is essential for effective treatment and monitoring resistance.
- Diagnostic screening and therapeutic follow-up should align with established guidelines, utilizing non-invasive tests.