48results about How to "Infection Prevention and Control" patented technology

The invention discloses a surface protein of streptococcus suis type-2, preparation method thereof and application. The surface protein of streptococcus suis type-2 is numbered as gi|146321522 in genebank; the preparation method of the surface protein comprises the following steps: cloning gene of the surface protein; connecting the gene and expression plasmid of Escherichia coli to transform theEscherichia coli; inducing expressing; separating and purifying expression product; and the like. The surface lipoprotein can be used as a diagnostic target, and a specific antibody of the protein can be detected in animals and people infected with the streptococcus suis; moreover, the surface lipoprotein is also an important protective antigen, and can be used for preparing vaccines.

The invention discloses a helicobacter pylori urease B antigen epitope polypeptide and application thereof. The amino acid sequence of the antigen epitope polypeptide is the sequence 34 in a sequence table, and the coding gene sequence of the antigen epitope polypeptide is the sequence 25 in the sequence table. The antigen epitope polypeptide provided by the invention can stimulate an organism to generate helicobacter pylori resistance protective immunity reaction, thereby enhancing the effect of inhibiting helicobacter pylori infection, improving germ eliminating capacity of the organism, and playing an improving role in corresponding researches on development of vaccine and pathogenic mechanism and clinical diagnosis.

The invention discloses a helicobacter pylori urease B antigenic epitope polypeptide and application thereof. The amino acid sequence of the antigenic epitope polypeptide is the sequence 37 in a sequence table, and the encoding gene sequence of the antigenic epitope polypeptide is the sequence 28 in the sequence table. The antigenic epitope polypeptide can stimulate organisms to generate helicobacter pylori resistant protective immune response so as to enhance the suppression of the helicobacter pylori infection, improve the capacity of removing germs of the organisms, and play a promoting role in development of corresponding vaccines, research on pathogenic mechanism, and clinical diagnosis.

The invention belongs to the technical field of food production, and particularly relates to a nutrient enhancer for middle-aged goat milk powder and a preparation method thereof. The formula of the nutrient enhancer for middle-aged goat milk powder includes the following raw materials in parts by weight: 10-15 parts of an oat powder, 1-2 parts of a cranberry fruit powder, 1-3 parts of a Se-enriched germ brown rice powder, 1-2 parts of a purple yam powder, 1-2 parts of an almond powder, 1-2 parts of a flaxseed powder, 1-2 parts of a red date powder, 2-3 parts of a pueraria powder, 1-2 parts of lupeose, 2-3 parts of an apple juice powder and 1-3 parts of isomaltose hypgather. The nutrient enhancer adopts a scientific and reasonable formula integrating grains, fruit and yam, and the plant nutrient is comprehensive and sufficiently complementary to the holozoic nutrition in goat milk; the enhancer can enhance the nutrient in the goat milk and promote the absorbtion of the nutritional ingredients in the goat milk; in addition, the enhancer can condition the intestinal tract, help human bodies to discharge toxics, scavenge free radical, defer senility, and improve human immunity. The tests, such as an LD50 acute toxicity test, a 30-day feeding test, an Ames test, a mice bone marrow polychromatic erythrocytes micronucleus test, a mice sperm shape abnormality test, and a crowd efficacy observation test, are carried out, and the test results show that the nutrient enhancer is non-toxic and effective.