Effects of Bifidobacterium fermented milks on human intestinal flora Action sur la flore intestinale de laits fermentés au Bifidobacterium

Free access article

Issue		Lait Volume 73, Number 2, 1993 5^th Meeting of the " Club des Bactéries Lactiques ".


Page(s)		249 - 256
DOI		http://dx.doi.org/10.1051/lait:1993223

Lait 73 (1993) 249-256
DOI: 10.1051/lait:1993223

Action sur la flore intestinale de laits fermentés au Bifidobacterium

J. Ballongue, J.P. Grill and P. Baratte-Euloge

Laboratoire de chimie biologique, Université de Nancy I, BP 239, 54506 Vandoeuvre-lès-Nancy Cedex, France

Abstract - Effects of Bifidobacterium fermented milks on human intestinal flora
The action of 3 commercial Bifidobacterium fermented milks was studied on intestinal flora. The effect of Bifidobacterium species differed according to whether it was of human or animal origin. The consumption of human origin Bifidobacterium fermented milk (HBFM) induced a 8 000-fold increase in intestinal Bifidobacterium flora. No growth was seen with the consumption of animal origin Bifidobacterium fermented milk (ABFM). Moreover, HBFM consumption decreased Clostridium, Bacteroides and coliform flora respectively by 250-, 16 000- and 400-fold. 5-Fluorouracil resistant-strains of Bifidobacterium longum BB 536 were shown to be able to colonize and to grow in the large intestine. Most of the observed increase of Bifidobacterium flora was due to this strain, which represented 80% of the total Bifidobacterium flora.

Résumé - Depuis l'apparition des laits fermentés au "Bifidus", de nombreuses études tendant à montrer le rôle probiotique des bifidobactéries ont été entreprises. Nous avons étudié sur une population de 93 volontaires l'action de 3 laits fermentes du commerce sur certains genres bactériens hôtes habituels de l'intestin de l'homme. Après identification des espèces bifides utilisées, nous avons montré que seul un des laits fermentés contenant Bifidobacterium longum agit sur les populations étudiées. La sélection de souches de Bifidobacterium longum, résistantes au 5-fluorouracile nous a permis de montrer que toutes les souches d'une même espèce ne sont pas douées du même potentiel probiotique et que certaines souches industrielles sont capables de coloniser et de se multiplier dans le gros intestin de l'homme.

Key words: Bifidobacterium / intestinal flora / fermented milk / labelling of strains

Mots clés : Bifidobacterium / flore intestinale / lait fermenté / marquage de souche

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