A medicine, a food or a drink and feed which are effective for preventing and/or improving decline, occurring with age (senescence), in memory and learning ability are provided. A novel microorganism having the effect of preventing and/or improving decline, occurring with age (senescence,) in memory and learning ability is provided. More specifically, the microorganism is characterized by being a microorganism belonging to Lactobacillus, Bifidobacterium, Streptococcus, Leuconostoc or Pediococcus, more specifically a microorganism belonging to any of Lactobacillus acidophilus, Lactobacillus gasseri, Lactobacillus gallinarum, Lactobacillus johnsonii, Lactobacillus delbrueckii subsp. delbrueckii, Bifidobacterium catenulatum, Bifidobacterium pseudolongum, Bifidobacterium bifidum, Bifidobacterium breve, Bifidobacterium longum, Streptococcus thermophiles, Leuconostoc mesenteroides subsp. dextranicum, Leuconostoc lactis, Pediococcus acidilactici and Pediococcus pentosaceus.

An object of this present invention is to provide a composition for inhibiting norovirus infection which can inhibit norovirus from infecting a human, and the object is achieved by a composition for inhibiting norovirus infection containing one or more kinds of bacteria selected from the group consisting of Bifidobacterium breve, Bifidobacterium longum subsp. infantis, Bifidobacterium animalis, Bifidobacterium bifidum, Bifidobacterium catenulatum, Lactobacillus gasseri, Lactobacillus helveticus, Lactobacillus delbrueckii subsp. Bulgaricus and Lactobacillus paracasei as an active ingredient.

A composition comprising combination of salt, sugar and lactic acid bacteria as an active ingredient to treat vaginosis. The composition showed potent antibacterial activity through various experiments, for example, (1) the indirect inhibitory activity test from the growth of vaginosis causing bacteria by determining the change of pH and lactic acid level; (2) the direct inhibitory activity test from the growth of vaginosis causing bacteria by determining the susceptibility of test sample; (3) brief clinical tests, and finally confirmed that the combination showed potent antibacterial activity in the test. Accordingly, the combination may be useful to alleviate and treat vaginosis in the form of a pharmaceutical composition, health functional food, food additive, topical composition, and detergent composition.

The present invention relates to methods for feeding and to compositions to be administered to infants delivered via caesarian section and in particular to the use of a) at least two different microorganisms; or b) at least one microorganism and at least one indigestible oligosaccharide; or c)at least two different Bifidobacteria species, subspecies or strains for the manufacture of a composition for enteral administration to an infant delivered via caesarean section. Thereby it is possible to stimulate the healthy development of the intestinal flora of said infants.

The present invention provides the use of a composition comprising non-digestible oligosaccharide for the manufacture of a composition for enteral administration to an infant delivered via caesarean section.