Abstract
Changes in autoaggregation ability and surface hydrophobicity of bifidobacteria with addition of bovine lactoferrin in liquid media were investigated. Lactoferrin addition caused loss of autoaggregation ability, disappearance of microscopic clusters and produced consistent turbidity in the cultured medium compared with control. Similar outcomes with addition of bovine lactoferrin hydrolysates (pepsin), bovine transferrin or ovotransferrin suggested that the effect is not lactoferrin-specific. On the other hand, addition of proteins, except bovine transferrin, did not alter surface hydrophobicity. These results indicate that one or more surface components involved in autoaggregation of bifidobacteria are proteins.
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