Optimal liquid culture media for Helicobacter pylori: Strain-specific growth in different broth formulations
So Myoung Kim1, Md Intazur Rahaman1, Chang Seok Bang2
1Department of Pharmacology, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, South Korea.
Background:
The unique survival environment of Helicobacter pylori (H. pylori) presents challenges in establishing appropriate in vitro culture conditions. The fastidious nature of H. pylori and its relatively low growth rate emphasize the need for customized culture conditions, which are essential for both research and clinical applications.
Aim:
To identify the optimal liquid culture medium for H. pylori using both reference and clinical strains.
Methods:
Nine H. pylori strains were incubated in 10 different broth media commonly used for bacterial cultures under microaerophilic conditions. Bacterial concentrations were estimated using serial dilutions and the pour plate method. A range of H. pylori initial inoculum concentrations was tested for each strain. For growth evaluation, optical density at 600 nm was measured at 24, 48, and 72 hours. The growth trends of H. pylori were compared among strains and media.
Results:
All H. pylori strains grew successfully over time, regardless of the initial inoculum concentration. The specific growth trends and the broth that yielded the highest optical density value at each time point varied with strain. The reference strains (H. pylori 26695, ATCC 43504, and J99) consistently exhibited robust growth, whereas the clinical strains displayed distinct media preferences. Overall, bacterial growth was higher in chopped meat carbohydrate broth, Columbia broth, and fastidious anaerobe broth than in Brucella broth after 72 hours.
Conclusion:
Chopped meat carbohydrate broth was the most effective for H. pylori liquid culture, and Columbia broth and fastidious anaerobe broth also supported greater growth than Brucella broth.
Insights
Chopped meat carbohydrate broth is optimal for culturing Helicobacter pylori (H. pylori). Other effective media include Columbia broth and fastidious anaerobe broth for H. pylori research and clinical applications.
Area of Science:
- Microbiology
- Bacterial Culture Optimization
- In Vitro Diagnostics
Background:
- Helicobacter pylori (H. pylori) presents unique challenges for in vitro culture due to its survival environment and fastidious nature.
- Optimized culture conditions are crucial for H. pylori research and clinical applications.
Purpose of the Study:
- To determine the optimal liquid culture medium for H. pylori using reference and clinical strains.
- To compare the growth performance of different broth media for H. pylori.
Main Methods:
- Incubation of nine H. pylori strains in ten different broth media under microaerophilic conditions.
- Estimation of bacterial concentrations via serial dilutions and pour plate method.
- Measurement of optical density at 600 nm at 24, 48, and 72 hours for growth evaluation.
Main Results:
- All H. pylori strains demonstrated successful growth over time, irrespective of initial inoculum concentration.
- Growth trends and optimal media varied among strains, with reference strains showing robust growth.
- Chopped meat carbohydrate broth, Columbia broth, and fastidious anaerobe broth supported higher bacterial growth than Brucella broth after 72 hours.
Conclusions:
- Chopped meat carbohydrate broth is the most effective medium for H. pylori liquid culture.
- Columbia broth and fastidious anaerobe broth also showed superior performance compared to Brucella broth for H. pylori growth.
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