A composition for promoting development of the intestinal tract, a composition for improving lung function or a composition for improving immune function containing a bacterium belonging to Bifidobacterium longum subsp. infantis is provided. The bacterium is preferably Bifidobacterium longum subsp. infantis M-63 (NITE BP-02623).

Provided are vesicles derived from Enhydrobacter bacteria and a use thereof, and the inventors experimentally confirmed that the vesicles were significantly reduced in clinical samples obtained from patients with pancreatic cancer, cholangiocarcinoma, breast cancer, ovarian cancer, lymphoma, myocardial infarction, cardiomyopathy, atrial fibrillation, variant angina, liver cirrhosis, and diabetes, compared with a normal individual, and that when vesicles isolated from the strain were administered, the secretion of inflammatory mediators caused by pathogenic vesicles, such as E. coli-derived vesicles, was significantly inhibited. Therefore, it is expected that the vesicles derived from Enhydrobacter bacteria according to the present invention can be effectively used for a method of diagnosing pancreatic cancer, cholangiocarcinoma, breast cancer, ovarian cancer, lymphoma, myocardial infarction, cardiomyopathy, atrial fibrillation, variant angina, liver cirrhosis, or diabetes, and for developing a composition for preventing, alleviating or treating the diseases.

The present invention relates to a composition for preventing or treating inflammatory diseases, comprising a Lactobacillus sakei CVL-001 strain. The composition activates NOD2, which is an inflammation regulator, and exhibits the effects of inhibiting weight loss and improving clinical activity scores (disease activity index; DAI) in an animal model in which ulcerative colitis is induced, and thus the present invention can be effectively used in the prevention, treatment or alleviation of inflammatory diseases.

A cognitive function-improving agent containing one or both of Bifidobacterium breve FERM BP-11175 and a culture of Bifidobacterium breve FERM BP-11175 as an active ingredient for administration to a subject who has not developed dementia is provided.

A cognitive function-improving agent containing one or both of Bifidobacterium breve FERM BP-11175 and a culture of Bifidobacterium breve FERM BP-11175 as an active ingredient for administration to a subject who has not developed dementia is provided.

Provided is a method for preventing, alleviating, or treating a viral infectious disease or a respiratory disease, comprising administering a composition containing vesicles derived from Lactobacillus paracasei as an active ingredient to a subject in need thereof, wherein the vesicles may be orally administered and delivered to the lung to suppress a respiratory disease, administered to a COVID-19 virus- or influenza virus-infected model to suppress the replication of the COVID-19 virusand clinical symptoms caused by the influenza virus.

The method for protein selection can include: characterizing a protein set, training a prediction model, determining target characteristic values, and determining a candidate protein set based on the target characteristic values.

Nutritional supplements and methods of nutritional supplementation are described for increasing weight loss in a subject. In some embodiments, the nutritional supplement includes a probiotic such as Lactobacillus, a postbiotic such as heat-treated Bifidobacterium, a prebiotic such as a fiber, and a phytobiotic such as a plant extract.

Nutritional supplements and methods of nutritional supplementation are described for increasing weight loss in a subject. In some embodiments, the nutritional supplement includes a probiotic such as Lactobacillus, a postbiotic such as heat-treated Bifidobacterium, a prebiotic such as a fiber, and a phytobiotic such as a plant extract.

Bifidobacterium longum strains and cell wall fractions isolated from Bifidobacterium longum strains are useful in the prophylaxis or treatment of a respiratory viral infection in a subject. They are also useful in the prophylaxis of a secondary bacterial infection associated with a respiratory viral infection in a subject, especially a subject who is susceptible to respiratory infections.