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Quality assurance criteria for probiotic bacteria
E Tuomola1, R Crittenden, M Playne
1Department of Biochemistry and Food Chemistry, University of Turku, Finland.
The American Journal of Clinical Nutrition
|February 7, 2001
Summary
Ensuring probiotic quality requires more than just viability. Functional probiotic strains must maintain key characteristics like acid/bile tolerance and intestinal adhesion for effectiveness. This ensures they survive the gut and provide health benefits.
Area of Science:
- Microbiology
- Food Science
- Gastroenterology
Background:
- Probiotic quality control traditionally focuses on bacterial viability.
- Probiotic effectiveness depends on maintaining functional health characteristics.
- Survival through the gastrointestinal tract and colonization are crucial for probiotics.
Purpose of the Study:
- To outline in vitro testing methods for functional probiotic strain quality control.
- To emphasize the importance of assessing acid and bile stability.
- To highlight intestinal mucosal adhesion as a key quality assurance criterion.
Main Methods:
- In vitro testing for acid and bile tolerance.
- Assessment of survival and growth in the presence of bile.
- Evaluation of intestinal cell (e.g., Caco-2) and mucus adhesion.
- Molecular techniques for examining strain stability.
Main Results:
- In vitro tests can effectively evaluate probiotic strain stability and functionality.
- Adhesion properties correlate with health benefits like reduced diarrhea duration and immune effects.
- Maintaining functional characteristics is vital for probiotic efficacy.
Conclusions:
- Quality control for probiotics must extend beyond viability to include functional traits.
- In vitro assays provide reliable methods for assessing probiotic quality.
- Monitoring adhesion properties is essential for ensuring probiotic health benefits.