365 results about "Streptococcus bacteria" patented technology

The invention relates to a fusion protein, an immunogenic composition and a recombinant degenerate vaccine for preventing and treating infection of various pathogenic streptococci, as well as a molecular architecture design, application and the like. According to the invention, three immune antigens, namely an elongation factor Tu (Tuf), a molecular chaperone DnaK and an elongation factor G (fusA), are screened, and it is proved that fusion protein molecules of the three antigens can significantly inhibit tissue lesions caused by infection of different serotypes and different types of streptococci, have good immunogenicity, play roles in immune protection and effective prevention and treatment, and have good application prospects. The bacillus subtilis has the characteristics of broad-spectrum and high-efficiency prevention of streptococcus bacterial infection, and has a wide application prospect.

The invention discloses application of polypeptide compounds in prevention and treatment of pathogenic microorganisms. The compound has a synergistic effect on agricultural fungi such as rhizoctonia solani, Sclerotinia sclerotiorum, Botrytis cinerea, Fusarium graminearum, Pyricaria oryzae, pyricularia oryzae, pyricularia oryzae, pyricularia oryzae, pyricularia oryzae, pyricularia oryzae, pyricularia oryzae, pyricularia oryzae, pyricularia oryzae, pyricularia oryzae, pyricularia oryzae, pyricularia oryzae and pyricularia oryzae. The method comprises the following steps: carrying out sterilization on plant bacteria such as Xanthomonas oryzae PXO99A, Xanthomonas axonophora dispsp.citrijx-6, Pseudomonas solanacearum (Smith) BNCC335855, Pseudomonas sp. The method is characterized by comprising the following steps of: killing Aspergillus flavus ACCC32601 (Aspergillus flavus), Penicillium expansum ACCC 30898 (Penicillium expansum. EXPANSum ACCC 30898), Monilinia coerulea ACCC 36263 (Aspergillus oryzae, Aspergillus niger, Aspergillus niger, Aspergillus niger, Aspergillus niger, Aspergillus niger, Aspergillus niger, Aspergillus niger and Aspergillus niger); the compound disclosed by the invention has a certain inhibition activity on various diseases caused by streptococcus agalactiae ATCC 27956, streptococcus dysgalactiae ATCC27957, Escherichia coli ATCC 25922 and Staphylococcus aureus, particularly, the compound Thiostreptin has a particularly remarkable inhibition effect on agricultural pathogenic bacteria, food-borne germs and cow mastitis germs, and is expected to be developed into a novel antibacterial drug, so that the compound disclosed by the invention can be used for preparing the antibacterial agent for preventing and treating various diseases caused by the streptococcus agalactiae ATCC 27956, the streptococcus dysgalactiae ATCC27957, the Escherichia coli ATCC 25922 and the Staphylococcus aureus.

The invention relates to streptococcus thermophilus CT-02 with an immune regulation effect and application of the streptococcus thermophilus CT-02, the classification name of the streptococcus thermophilus CT-02 with the immune regulation effect is Streptococcus thermophilus, the preservation number of the streptococcus thermophilus CT-02 is GDMCC No: 64474, and the preservation date of the streptococcus thermophilus CT-02 is March 29, 2024. The strain has an excellent immune regulation effect which is specifically shown as follows: by moderately activating macrophages, not only can the excessive activation of TNF-alpha, IL-1beta, IL-6 and IL-12 be avoided, but also the activation level of IL-10 can be improved, that is, the levels of various inflammatory factors secreted by the macrophages are comprehensively regulated, and the strain has a potential anti-inflammatory effect while activating immunity. The strain has a prospect for preparing a product with an immune regulation effect or a product with an inflammatory factor regulation effect.

The invention discloses a meningioma saliva microbial marker, a product and application of the meningioma saliva microbial marker, and belongs to the field of biological medicine. The saliva microbial marker is prepared from one or more of fusobacterium periodontium, neisseria microflavus, and Streptococcus cristatum, and the saliva microbial marker is prepared from one or more of the following components: the fusobacterium periodontium, the neisseria microflavus, and the Streptococcus cristatum, and the saliva microbial marker is prepared from one or more of the following components: the Saccharomyces cerevisiae, the Saccharomyces cerevisiae, the Saccharomyces cerevisiae and the Saccharomyces cristatum. The invention provides a kit which comprises a detection reagent for detecting the relative abundance of the saliva microbial marker. The invention provides a product for diagnosing meningioma and a computer program product related to meningioma. The product provided by the invention has good feasibility and accuracy, can effectively evaluate the risk of meningioma, and provides a new tool for clinical diagnosis.

The invention discloses application of a series of quinine derivatives in preventing and treating pathogenic bacteria of cow mastitis, and belongs to the field of natural medicinal chemistry. According to the present invention, with the application of the derivative, the excellent inhibition activity on the dairy cow mastitis pathogenic bacteria such as Streptococcus agalactiae ATCC 27956 and Streptococcus dysgalactiae ATCC 27957 can be provided, and the excellent inhibition activity can be provided on the dairy cow mastitis pathogenic bacteria such as Streptococcus agalactiae ATCC 27956 and Streptococcus dysgalactiae ATCC 27957; the synthesis method of the compound is simple, and the compound has great application value in the aspect of natural product source compounds for preventing and treating cow mastitis. Structural formula of related compound as follows: # imgabs0 #

The invention relates to the technical field of biology and new medicine, in particular to a preparation method, an identification method and a histopathologic analysis method of a rat uterus scar diverticulum model. The preparation method of the rat uterus scar diverticulum model comprises the following steps: sequentially simulating rat pregnancy by using female progestational hormone, and infecting a uterus incision by using group B streptococcus (GBS) to obtain the rat uterus scar diverticulum model. The preparation method comprises the following steps: constructing a pseudopregnant rat model; preparing a GBS bacterial solution with a certain concentration, and immersing 3-0 silk threads with the length of about 1cm into the bacterial solution for 24 hours for later use; an incision with the length of about 2 cm is formed in the uterus on the two sides of the rat, and the incision is sutured discontinuously by an absorbable line. The simulated pregnant mouse is used, the influence of uterine hyperemia during human delivery and hormone change after female progestational hormone withdrawal on the uterine microenvironment is met, the formation of the human uterine scar diverticulum simulated by using the group B streptococcus infection incision is related to cesarean delivery incision infection, and therefore the success rate of the obtained model is high.

The invention relates to the technical field of microorganisms, in particular to plant lactobacillus BR32 with functions of preventing decayed teeth and improving inflammation and application of the plant lactobacillus BR32. The plant lactobacillus BR32 with the functions of preventing decayed teeth and improving inflammation, provided by the invention, has the preservation number of CGMCC No.32836, has an inhibiting effect on the growth of oral pathogens such as streptococcus mutans, candida albicans and porphyromonas gingivalis, is high in oxidation resistance, is beneficial to continuous oral cavity stability maintenance through a synergistic effect, also has relatively high hydrophobicity and self-agglutination capability, and can be used for preparing oral cavity health-care products. The compound is low in tooth environment corrosion, high in lysozyme tolerance and good in oral colonization capacity, does not have a hemolysis phenomenon in in-vitro hemolysis culture, is sensitive to common antibiotics and has relatively high food safety. The invention further provides a microbial agent, a probiotic product, a functional food, a fermented product, a bacteriostatic agent and an oral product containing the plant lactobacillus BR32 with the functions of preventing the decayed teeth and improving the inflammation, and the effects of preventing the decayed teeth, improving the inflammation, preventing dental plaque, relieving oral ulcer and the like are achieved.

The invention relates to a streptococcus thermophilus CT-01 and application of the streptococcus thermophilus CT-01 in preparation of an immunomodulatory preparation, the classification name of the streptococcus thermophilus CT-01 is Streptococcus thermophilus, the preservation number of the streptococcus thermophilus CT-01 is GDMCC No: 64473, and the preservation date of the streptococcus thermophilus CT-01 is March 29, 2024. The bacterium has an excellent immune regulation effect which is specifically shown as follows: comprehensive regulation is performed on the behavior of secreting inflammatory factors by macrophages, excessive activation of TNF-alpha, IL-1beta and IL-6 can be avoided, the level of IL-10 can be improved, and the bacterium has a potential anti-inflammatory effect while regulating immunity. The strain has a prospect for preparing a product with an immune regulation effect or a product with an inflammatory factor regulation effect.

The invention discloses application of epimedin A in preparation of a streptococcus suis type 2 capsule inhibitor, and belongs to the technical field of biological medicine. The compound can effectively inhibit the synthesis function of the streptococcus suis type 2 capsule, further enhances the removal effect of a host on the streptococcus suis type 2, reduces the pathogenicity of bacteria, and provides a new candidate compound and idea for preparing a capsule inhibitor of the streptococcus suis type 2 and researching and developing a novel medicine for treating streptococcus suis type 2 infection.

The invention discloses construction and application of a streptococcus suis serotype 2 cps2C gene knockout mutant strain. The invention relates to a streptococcus suis serotype 2 cps2C gene knockout mutant strain 05ZYH33 delta cps2C. A coding gene, from the 31st site to the 1000th site, of the cps2C gene in the strain 05ZYH33 is replaced by a spectinomycin resistance gene cassette SpcR. The mutant strain 05ZYH33 delta cps2C is applied to preparation of a streptococcus suis type 2 attenuated vaccine and a subunit vaccine. The capsule of the mutant strain 05ZYH33 delta cps2C is obviously reduced; in-vitro experiments show that the macrophage phagocytosis resistance of the mutant strain 05ZYH33 delta cps2C is reduced, and animal toxicity test results show that the toxicity of the mutant strain is obviously reduced. The mutant strain provides an important clue for screening of protective antigens of multivalent subunit vaccines, and can be applied to development of S.suis attenuated vaccines and multivalent subunit vaccines.

The invention relates to streptococcus thermophilus and application thereof, in particular to novel streptococcus thermophilus YSC1003 which has good fermentation performance and safety, and prepared fermented milk is short in fermentation time, large in viable count, high in viscosity and water-holding capacity and high in antioxidant activity. In addition, the invention also provides a compound strain containing the streptococcus thermophilus YSC1003, the compound strain has better fermentation performance and safety, and compared with a single strain, the fermentation time of the fermented milk prepared by the compound strain is obviously shortened, the viable count is obviously increased, and the fermentation time of the fermented milk prepared by the compound strain is obviously shortened under the condition of consistent bacterial quantity through strain interaction and synergistic interaction. The viscosity and the water-holding capacity are obviously improved, and the antioxidant activity is obviously improved.

The invention discloses an application of marine streptomyces SH110 and a source compound thereof, the marine streptomyces SH110 has a preservation number of GDMCC (China General Microbiological Culture Collection Center) NO.66668, and the preservation date is July 14, 2025; the invention also discloses application of the marine streptomyces SH110-derived compound in preparation of a medicine for preventing and treating streptococcus and vibrio diseases. The marine streptomyces source compound has efficient vibrio and streptococcus resisting activity, the vibrio and streptococcus resisting activity is not reported, and the marine streptomyces source compound has new application. The marine streptomyces source compound is used for preparing the medicine for preventing and treating the vibrio and streptococcus diseases, especially for preparing the medicine for preventing and treating the vibrio and streptococcus diseases of aquaculture animals, the safety is high, and the treatment effect is good.

The invention provides an application of streptococcus salivarius in fatty liver, in particular to an application of streptococcus salivarius in preparation of a product, and the product is used for at least one of the following applications: (a) losing weight or reducing body fat; (b) improving the glucose tolerance of the patient; (c) increasing the sensitivity of the patient to insulin; (d) treating, relieving and preventing liver injury; (e) treating, relieving and preventing non-alcoholic steatohepatitis; (f) fat deposition caused by high-fat and high-cholesterol diet is reduced; (g) reducing blood fat; and / or (h) improving the level of at least one of the following indexes in the liver of the mammal: total cholesterol, triglyceride, low density lipoprotein-cholesterol and free fatty acid.

The invention belongs to the field of molecular biological detection, and provides a joint detection composition which is mainly used for detecting related pathogens by using a multiple fluorescent PCR (Polymerase Chain Reaction) analysis method. Therefore, at least four of the klebsiella aerogenes, the stenotrophomonas maltophilia, the streptococcus angina, the acinetobacter baumannii, the klebsiella pneumoniae and the klebsiella oxytoca can be simultaneously detected and distinguished in a single-tube reaction system. Meanwhile, the detection sensitivity of the composition is higher and reaches 500 copies / mL, and the detection is more accurate.

The invention provides a composition and application thereof in caries prevention. The composition comprises fluoride and polypeptide, the concentration of F <-> in the fluoride in the composition is 1.79 to 7.14 mM; the concentration of the polypeptide in the composition is 1.56-12.5 [mu] M, and the amino acid sequence of the polypeptide is as shown in SEQ ID NO: 1. The natural advantage that polypeptide is not prone to drug resistance is utilized, the risk that streptococcus mutans and other bacteria generate drug resistance is greatly reduced, the inhibition effect of fluoride on streptococcus mutans can be remarkably enhanced, and a good anti-caries effect can be achieved under the low concentration (F <-> is 1.79-7.14 mM) of fluoride. Moreover, adverse effects on probiotics in the oral cavity are avoided, and the oral micro-ecological balance can be adjusted. Therefore, the composition disclosed by the invention is suitable for preparing products for preventing caries, inhibiting streptococcus mutans and regulating oral micro-ecological balance.

Compositions comprising 5. salivarius strain SALI-10 and / or salivarius 10 peptide are taught. Also taught are methods of treating bacterial infections comprising administering a pharmaceutically acceptable amount of the composition to the patient with a bacterial infection caused by a pathogen from, for example, multi-drug resistant (MDR) Streptococcus pneumoniae, Streptococcus pyogenes, Streptococcus dysagalactiae, vancomycin-resistant Enterococcus faecium, Porphyromonas gingivalis, Tannerella forsythia, and MDR Enterococcus faecalis.

The invention provides a streptococcus suis polysaccharide protein conjugate vaccine as well as a preparation method and application thereof, and belongs to the technical field of vaccine preparation. The vaccine comprises a polysaccharide-protein conjugate formed by coupling streptococcus suis type 2 capsular polysaccharide and streptococcus suis type 2 recombinant protein. The preparation method comprises the following steps: S1, preparing streptococcus suis type 2 capsular polysaccharide; s2, preparing streptococcus suis type 2 recombinant protein; s3, activating polysaccharide; s4, combining the biotinylated polysaccharide with the recombinant protein containing the avidin structural domain to form a stable polysaccharide-protein conjugate; s5, removing unbound proteins; and S6, mixing the polysaccharide-protein conjugate with the oil-water emulsion in proportion. By optimizing a coupling technology and a vaccine preparation formula, the immunogenicity and the protection effect of the vaccine are improved, the safety and the broad-spectrum cross protection capability of the vaccine are remarkably enhanced, the complexity and the cost of a vaccine production process are reduced, and the vaccine has a good industrial application prospect and a good popularization value.

The invention discloses an external genital organ care spray and a preparation method thereof, and the external genital organ care spray comprises an antibacterial composition, a humectant, a surfactant, an antioxidant, a thickening suspending agent, essence, a pigment, a pH balance regulator and the balance of deionized water; the antibacterial composition comprises a metal ion compound and a plant source antibacterial compound; the external genital organ nursing spray is convenient to use, targeted in administration, good in heat-resistant stability, mild, non-irritating and remarkable in effect, has an obvious inhibition effect on common pathogenic microorganisms causing external genital organ infection, such as staphylococcus, streptococcus, escherichia coli, candida, candida albicans and trichomonad vaginalis, is not easy to generate drug resistance, and can be used for treating external genital organ infection. The external genital infection and inflammation can be effectively prevented and relieved, the damaged skin can be repaired, and a good nursing effect is achieved.

The invention belongs to the technical field of molecular biology, and particularly relates to a construction method and application of a streptococcus pneumoniae pneumonia animal model. The invention provides a construction method of a streptococcus pneumoniae infected rat pneumonia and kidney injury model. The method comprises the following steps: S1, applying a streptococcus pneumoniae liquid into the respiratory tract of a rat by adopting an atomization bacterium feeding mode; and S2, verifying whether the rat treated in the step S1 is infected with pneumonia or not and whether kidney injury exists or not. According to the method, whether pneumonia is infected or not is judged by detecting inflammatory factors in alveolar lavage and lung HE staining, and whether kidney injury exists or not is judged by detecting the urine protein / creatinine ratio in a rat urine sample and detecting kidney HE staining. The construction method provided by the invention is convenient to operate, accurate in model construction and high in survival rate.

The invention belongs to the technical field of probiotics, and particularly relates to a probiotic composition capable of improving emotion and a preparation method and application of the probiotic composition capable of improving emotion. The composition comprises bifidobacterium pseudolongum, Adellomyces aldelii, microbacter cecum, streptococcus thermophilus, Ackermann mucophilus and intestinal pasteurella, and the probiotic composition capable of improving emotion and the preparation method and application of the probiotic composition capable of improving emotion and the preparation method and application of the probiotic composition capable of improving emotion and the probiotic composition capable of improving emotion and the probiotic composition capable of improving emotion and the probiotic composition capable of improving emotion. The obtained probiotic composition has a remarkable improvement effect on animal depression and anxiety behaviors caused by chronic social contusion stress, and the technical problem that in the prior art, depression drugs cannot target intestinal flora metabolite regulation and accurate intervention of neurotransmitter balance at the same time is solved. The probiotic composition can quickly and enduringly improve depression and anxiety behaviors caused by chronic stress, has better safety, and can be used for preventing and treating depression and related mental diseases thereof.

The invention belongs to the technical field of synthesis and antibiosis of nano-enzyme catalysis systems, and discloses an enzyme catalysis system with a function of targeted inhibition of growth of streptococcus mutans as well as preparation and application of the enzyme catalysis system. The enzyme catalysis system with the targeted inhibition function on the growth of the streptococcus mutans is formed by loading AuNPs and PCN-22 (Fe) on a CMD molecular chain through in-situ growth, and the mass ratio of the AuNPs to the PCN-22 (Fe) to the CMD is (0.22%-0.33%) to (12.34%-21.79%) to (77.88%-87.44%). The cascade catalytic effect of the nano-enzyme is adjusted by regulating and controlling the carboxymethyl substitution degree of CMD, so that glucose in a decayed tooth pathological environment is efficiently catalyzed in one step to generate ROS, and damage to probiotics is reduced while the inhibition efficiency of pathogenic bacteria is improved.

The invention discloses a multiple qPCR (quantitative polymerase chain reaction) detection reagent for detecting neonatal gastrointestinal infection pathogens. The kit comprises specific primers and probes for detecting enterohemorrhagic escherichia coli, staphylococcus aureus, pseudomonas aeruginosa, streptococcus agalactiae, klebsiella pneumoniae, staphylococcus epidermidis, beta hemolytic streptococcus, salmonella, rotavirus and adenovirus. According to the invention, different fluorescently-labeled probes are utilized to add specific primers and probes of multiple pathogens into a reaction system to detect multiple targets at the same time, and the method has the advantages of good specificity, high sensitivity, short detection period, capability of simultaneously detecting multiple pathogens, rapidness, simplicity, convenience and economy; a convenient method is provided for rapid detection of pathogens causing neonatal gastrointestinal infection, and the kit has important significance in epidemiological research, clinical early molecular diagnosis and the like.

The invention relates to the technical field of antibacterial preparations, and discloses an application of etoposide in an antibacterial preparation and the antibacterial preparation, the antibacterial preparation is a biofilm inhibitor, and etoposide inhibits formation of a biofilm or destroys the formed biofilm by down-regulating gene expression of the bacterial biofilm, so that the antibacterial effect of etoposide is improved. The biofilm is a biofilm of streptococcus mutans ATCC700610, and the biofilm is a biofilm of streptococcus mutans The antibacterial preparation comprises an antibacterial drug, an oral care product, a medical coating and an anti-caries preparation. MIC and MBC determination tests, growth curve tests, crystal violet staining tests, bacterium living / death staining tests and qRT-PCR tests prove that etoposide can effectively down-regulate biofilm related gene expression (such as gtfB, gtfC, gtfD and the like), inhibit formation of a bacterial biofilm or destroy a formed biofilm, and achieve an antibacterial effect.

The present disclosure relates to a method for treating triple-negative breast cancer or non-muscle-invasive bladder cancer in a subject, comprising administering to the subject a composition comprising nonviable cells of Streptococcus pyogenes and an immune checkpoint inhibitor.

The invention relates to a preparation method and application of erythritol galactoside. The method specifically comprises the following steps: constructing a reaction system which takes o-nitrobenzene-beta-D-galactopyranoside as a glycosyl donor, erythritol as a receptor and recombinant beta-galactosidase Bga7 as a catalytic enzyme, so as to prepare the erythritol-beta-galactoside. Wherein the amino acid sequence of the beta-galactosidase Bga7 is as shown in SEQ ID No.2, and the nucleotide sequence of the beta-galactosidase Bga7 is as shown in SEQ ID No.1. The invention also provides an application of the erythritol-beta-galactoside in preparation of daily chemical products or medical preparations for resisting streptococcus mutans infection. The invention provides a novel beta-galactosidase Bga7 gene of a glycosidase family 2, and a novel tool enzyme is provided for synthesis of galactoside products. The erythritol-beta-galactoside prepared by the invention has good effects of preventing streptococcus mutans infection and caries, and can be used for preparing daily chemical products or medical preparations for preventing streptococcus mutans infection.

The invention discloses antibacterial mouthwash as well as a preparation method and application thereof, and belongs to the technical field of daily chemical products. According to the invention, egg white lysozyme, ferulic acid and grape seed procyanidine are taken as core components, and the mouthwash with an efficient bacteriostatic effect is developed. And the antibacterial rates of streptococcus mutans and porphyromonas gingivalis are 96.88% and 96.30% respectively. Researches show that bacterial biofilms can be destroyed by using the mouthwash, and the biofilm quantity is reduced by 53.7% after the bacterial biofilms are treated for 24 hours; extracellular polysaccharide is inhibited, the content of water-insoluble glucan is reduced by 62.3%, and synthesis of a key cariogenic matrix is hindered; the acid production capacity is regulated and controlled, the pH change of 24-hour culture is only 1.50, and xylitol competitively inhibits glycolysis and cooperates with ferulic acid to block bacterial metabolism. The mouthwash prepared by the invention avoids the problem of enzyme activity inhibition of the ionic surfactant of the traditional mouthwash, takes effect more quickly, and provides a basis for developing natural, safe and efficient functional mouthwash.

The present invention relates to multivalent immunogenic compositions comprising one or more Streptococcus pneumoniae polysaccharide protein conjugates wherein each of the conjugates comprises a polysaccharide from a Streptococcus pneumoniae serotype conjugated to a carrier protein wherein the serotype of the Streptococcus pneumoniae is as defined herein. In some embodiments, at least one of the polysaccharide protein conjugates is formed from a conjugation reaction comprising an aprotic solvent. In further embodiments, each of the polysaccharide protein conjugates is formed from a conjugation reaction comprising an aprotic solvent. Also provided are methods for inducing a protective immune response in a human patient comprising administering to the patient the multivalent immunogenic composition of the invention. The multivalent immunogenic composition is used to provide protection against Streptococcus pneumoniae infection and / or pneumococcal disease caused by Streptococcus pneumoniae. The compositions of the invention are also useful as part of a therapeutic regimen that provides supplemental protection for patients who have been vaccinated with a multivalent vaccine for the prevention of pneumococcal disease.

The present application belongs to the technical field of biological medicine, and particularly relates to a thiol phenylboronic acid mediated nano-enzyme immunochromatography reagent and application thereof. The present application utilizes the broad-spectrum binding ability of MPBA to the glycosylated molecules on the surface of pathogens, and combines the colorimetric catalytic double enhancement effect of the virus-like biomimetic magnetic nano-enzyme (FeAu@AuIr), to improve the detection sensitivity. The probe takes Fe3O4 magnetic nanoparticles as the core, and sequentially loads large-diameter gold nanoparticles (Au) and gold-iridium alloy (AuIr) with high catalytic activity, to enhance the pathogen capture capacity and signal amplification effect. Combined with the antibody modified immunochromatography strip, Streptococcus pneumoniae, Pseudomonas aeruginosa and SARS-CoV-2 can be simultaneously detected, and the detection sensitivity is greatly improved. Through verification of 170 clinical samples, the present application has good application prospect in on-site rapid detection, and provides an efficient and low-cost solution for precise screening of respiratory tract infectious pathogens.

This invention discloses a strain of Bifidobacterium animalis subspecies TRT-2A with allergy-relieving effects and its extracellular vesicle applications. The strain TRT-2A is deposited at the China Center for Type Culture Collection (CCTCC) on November 21, 2025, with accession number CCTCC NO:M 20252645. This strain is highly acid-resistant and exhibits good tolerance to artificial gastric and intestinal fluids. It effectively inhibits bacteria, particularly Streptococcus pyogenes, Streptococcus agalactiae, and / or Escherichia coli. Experimental results show that this strain can alleviate hormone-dependent dermatitis and effectively improve dermatitis symptoms such as erythema and desquamation. Furthermore, extracellular vesicles prepared using TRT-2A can effectively improve skin elasticity and reduce wrinkles. Therefore, the Bifidobacterium animalis subspecies TRT-2A of this invention has multiple functions and is worthy of further promotion and application.

The invention discloses an application of SNF2 protein derived from streptococcus angina extracellular vesicles in gastric cancer prognosis. The chromatin remodeling protein SNF2 derived from S.anginosus EVs can be combined with a transcription factor TEAD1, so that the transcription of the palmitoyl transferase ZDHHC11 is promoted together. Then, the stability of the ZDHHC11 is enhanced by catalyzing palmitoylation of PD-L1, and finally immune escape is induced. In addition, SNF2 also can activate AXL, CTGF, CYR61 and other carcinogenic targets at the downstream of TEAD1, thereby further accelerating the malignant progression of gastric cancer. In an in-vivo experiment, the intragastric administration of the S.anginosus EVs not only promotes the tumor growth of mice, but also significantly inhibits the infiltration of CD8 + T cells. Blocking of ZDHHC11 can effectively reverse immune escape, and has a synergistic effect with an anti-PD-1 therapy, so that the treatment effect is remarkably improved.