The present invention relates to the use of a supernatant of lactic acid bacteria
or of Bifidobacteria capable of preventing colonization of intestinal cells by
Giardia intestinalis, for the preparation of an ingestable carrier for the
treatment and/or prophylaxis of disorders associated with the colonization of the
gut by Giardia intestinalis. The present invention also pertains to specific
strains of Bifidobacterium having the above traits and to the ingestable carrier,
such as a food or pharmaceutical composition containing such supernatant or the microorganisms.
