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Indigenous dadih lactic acid bacteria: cell-surface properties and interactions with pathogens.
M Carmen Collado1, Ingrid Surono, Jussi Meriluoto
1Functional Foods Forum, University of Turku, Itäinen Pitkäkatu 4A, FI-20014 Turku, Finland. marcol@utu.fi
Journal of Food Science
|November 13, 2007
Summary
Researchers studied dadih lactic acid bacteria, finding that cell surface properties like autoaggregation and adhesion are key indicators. These traits, along with coaggregation with pathogens, can help screen for potential probiotic strains for food development.
Area of Science:
- Microbiology
- Food Science
- Probiotics
Background:
- Cell surface properties of lactic acid bacteria (LAB) are crucial for their functionality.
- Adhesion to hydrocarbons (BATH) and aggregation abilities (autoaggregation and coaggregation) are important characteristics for LAB.
- These properties influence the bacteria's interaction with the host gastrointestinal tract and potential pathogens.
Purpose of the Study:
- To investigate the cell surface properties of dadih lactic acid bacteria strains.
- To assess the adhesion to hydrocarbons (BATH) and aggregation abilities (autoaggregation and coaggregation) of these strains.
- To determine the potential of these properties for screening probiotic bacteria.
Main Methods:
- Studied cell surface properties including adhesion to hydrocarbons (BATH) and autoaggregation.
- Investigated coaggregation abilities with specific pathogen strains.
- Analyzed the effect of heat inactivation on bacterial hydrophobicity.
Main Results:
- Significant differences in cell surface properties were observed among the tested LAB strains.
- Hydrophobicity increased upon heat inactivation of the bacterial cells.
- All tested LAB strains exhibited aggregation abilities with pathogen strains, with strain-specific coaggregation properties.
Conclusions:
- Autoaggregation, cell surface hydrophobicity, and coaggregation with pathogens are valuable for preliminary screening of potential probiotic LAB.
- Characterizing bacterial cell-wall properties is important for understanding adhesion and aggregation mechanisms.
- These findings are relevant for the future development of probiotic foods from natural LAB strains.
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