Surface properties of bifidobacterial strains of human origin

Article Abstract:

A study was conducted to enable the definition of cell-adherent bacteria demonstrating hemagglutination and autoagglutination from non-cell-adherent, nonhemagglutinating, nonagglutinating bacteria. Results suggested that adherence of Bifidobacterium strains separated from infant feces and commercial fermented dairy products to enterocyte-like cells was associated with the autoagglutination and hemagglutination properties of these organisms. Furthermore, hydrophobicity appeared to be mandatory for adhesion to enterocyte-like cells and autoagglutination.

Bifidobacterium, Agglutination

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Cell surface-associated lipoteichoic acid acts as an adhesion factor for attachment of Lactobacillus johnsonii La1 to human enterocyte-like Caco-2 cells

Article Abstract:

The influence of pH on the adhesion of two Lactobacillus strains to Caco-2 cultured human intestinal cells has been studied. Experimental results reveal that the L. johnsonii La1 strain adhered to the intestinal cells when the pH value is between 4 and 7. The L. acidophilus La10 strain did not attach under the same conditions. A monoclonal antibody technique revealed that the lipoteichoic acid was responsible for the differences in the adhesion properties of both strains.

Physiological aspects, Cell adhesion molecules, Molecular biology, Cell adhesion

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Inhibition of Giardia intestinalis by extracellular factors from lactobacilli: an in vitro study

Article Abstract:

Lactobacillus johnsonii La1 produces a substance that can inhibit the proliferation of Giardia intestinalis trophozoites. The substance has a low mass and is heat-labile.

Giardia, Giardia lamblia

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