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Updated: Aug 23, 2026

Gastric Mucosa Quantitative Polymerase Chain Reaction Analysis for Detecting Helicobacter pylori and Antibiotic Resistance
Published on: March 7, 2025
Intrafamilial spread of the same clarithromycin-resistant Helicobacter pylori infection confirmed by molecular
Ikue Taneike1, Keibun Suzuki, Saori Nakagawa
1Division of Bacteriology, Department of Infectious Disease Control and International Medicine, Niigata University Graduate School of Medical and Dental Sciences, 757 Ichibanchou, Asahimachidori, Niigata, Japan. tatsuoy@med.niigata-u.ac.jp
Insights
Clarithromycin-resistant Helicobacter pylori (CRHP) is increasing globally, particularly in children. A mother and child shared an identical CRHP strain, indicating intrafamilial transmission may be a growing concern.
Area of Science:
- Microbiology
- Infectious Diseases
- Genetics
Background:
- Clarithromycin-resistant Helicobacter pylori (CRHP) is a growing global health concern.
- Pediatric infections with CRHP are increasingly reported worldwide.
- Helicobacter pylori eradication therapy often relies on clarithromycin.
Observation:
- A case study involving a mother and child infected with CRHP was investigated.
- DNA analysis was performed on isolates from both family members.
- The study aimed to understand the transmission dynamics of CRHP within a family unit.
Findings:
- DNA analysis confirmed that the CRHP isolates from the mother and daughter were indistinguishable.
- This genetic identity strongly suggests the transmission of a single CRHP strain between the mother and child.
- The findings highlight the potential for intrafamilial spread of resistant H. pylori strains.
Implications:
- Intrafamilial transmission represents a significant route for the spread of CRHP.
- Understanding familial transmission is crucial for developing effective prevention and control strategies.
- This case underscores the need for vigilance regarding antibiotic resistance in pediatric populations.
Abstract:
Clarithromycin-resistant Helicobacter pylori (CRHP) is increasing worldwide, especially in children. We report a family case in which both the mother and child were infected with CRHP. DNA analysis revealed that all of the mother's and daughter's isolates were indistinguishable, suggesting that the same CRHP strain spread between the family members. The spread of CRHP within families may be increasing.
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