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Updated: Aug 18, 2026

Gastric Mucosa Quantitative Polymerase Chain Reaction Analysis for Detecting Helicobacter pylori and Antibiotic Resistance
Published on: March 7, 2025
[Long-term observation of children with previously proved Helicobacter pylori infection]
Wojciech Radys1, Maria Korzon, Barbara Kamińska
1Klinika Pediatrii, Gastroenterologii i Onkologii, Dziecieca Akademia Medyczna, 80-803 Gdańsk, Poland.
Insights
Helicobacter pylori (HP) reinfection is low in children after successful therapy, with most patients experiencing reduced gastric symptoms. Long-term observation confirms the benefits of HP elimination in pediatric populations.
Area of Science:
- Pediatric Gastroenterology
- Infectious Diseases
- Microbiology
Background:
- Helicobacter pylori (HP) infection is a common cause of gastritis and duodenitis in children.
- Long-term sequelae and reinfection rates after treatment require further investigation.
Purpose of the Study:
- To assess the long-term reinfection rate of Helicobacter pylori in children and adolescents post-eradication therapy.
- To evaluate the sustained efficacy of HP treatment and its impact on gastric symptom recurrence.
Main Methods:
- A cohort of 29 children (9-20 years) with diagnosed HP infection was followed.
- Urea Breath Test (UBT) was used to confirm HP eradication initially and at 3 and 5-year follow-ups.
Main Results:
- Initial HP eradication was confirmed in 24 out of 29 patients (82.8%).
- After 3 years, 7 patients (24.1%) showed positive UBT results, indicating either treatment failure (5 patients) or reinfection (2 patients).
- UBT results remained consistent at the 5-year follow-up.
Conclusions:
- The rate of HP reinfection after successful therapy is low in pediatric populations, even in highly endemic areas.
- Eliminating HP significantly reduces the recurrence of gastric symptoms, although complete remission is not universal.
Aim Of The Work:
Long-term observation of children previously infected with Helicobacter pylori (HP) and evaluation of the reinfection rate after successful therapy. 29 children were included in the study: 16 girls and 13 boys, aged 9-20 years, who in 1998 were diagnosed as having gastritis and/or duodenitis and being infected with Helicobacter pylori. After the treatment, Urea Breath Test (UBT) was performed to evaluate eradication of HP. The test was repeated after 3 and 5 years. In 1998, UBT was negative in 24 of 29 patients, confirming eradication of HP. Three years after treatment, UBT revealed the presence of HP in 7 patients (24.1%) - 5 of them were children in whom eradicative therapy was unsuccessful; in the other two the result of UBT confirmed reinfection.
Results:
Results of UBT performed after next 2 years remained the same.
Conclusions:
HP reinfection rate after successful therapy is low among children and adolescents even in the environment where the bacteria is widely spread. Elimination of HP diminishes the rate of recurrence of gastric symptoms; only in some patients remission is complete.
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