Quantitation by hybridization probes of Lactobaclllus del-brueckii in theterminal ileum of fistulated Göttingen miniature pigs after feeding of yoghurt

摘要

The intestine of vertebrate animals is a complex ecosystem which is estimated to contain several hundreds of species of predominantly anaerobic microorganisms. This microflora is implicated in both beneficial and detrimental effects on health and well-being of the host. Lactic acid bacteria are natural inhabitants of the intestinal tract. They are also used as fermentative organisms that effect flavour, texture and preservative qualities of most fermented foods. Lactobacilli and bifidobacteria are the most important groups that are considered to bring forth probiotic strains owing to their roles as members of the indigenous microflora of humans. Phylogenetic studies have recognized 54 species of lactobacilli, 18 of which are regarded to enclose strains of some interest for probiotic products, and 31 species of bifidobacteria, 11 of which have been detected in human faeces(1,2). Members of the species L. delbrueckii are used for the fermentation of several milk products, e.g. the subspecies bulgaricus for the manufacture of yoghurt. The subspecies lactis, however, has been found as a normal inhabitant of the mammalian intestinal tract (3).