236 results about "Enterococcus faecium" patented technology

The invention provides an antibacterial peptide cAMP048 sourced from microorganisms in a deep sea environment and application of the antibacterial peptide cAMP048, and belongs to the technical field of peptide inhibitors. The antibacterial peptide cAMP048 has an amino acid sequence as shown in SEQ ID NO: 1 (Sequence Identity Number 1). The antibacterial peptide can inhibit the growth of acinetobacter baumannii at 64 mu M, inhibit the growth of multi-drug-resistant acinetobacter baumannii and multi-drug-resistant enterococcus faecium at 128 mu M and inhibit the growth of escherichia coli, staphylococcus aureus and multi-drug-resistant klebsiella pneumoniae at 256 mu M. The antibacterial peptide can be used for preparing products with antibacterial and / or bactericidal performance, and can be applied to preparation of antibacterial and / or bactericidal products. Such as food, skin care products or medical supplies.

The invention relates to a persistent deodorization type cat litter partner as well as a preparation method and application thereof. The cat litter mate is prepared by compounding nano zinc chloride, bacillus subtilis powder and enterococcus faecium powder according to a specific proportion, and has an excellent deodorization effect. The bacillus subtilis and enterococcus faecium powder can secrete various enzymes and bacteriocin, effectively decompose odor substances and inhibit growth of putrefying bacteria, and tolerate the bactericidal effect of nano zinc chloride at the same time. The cat litter mate provided by the invention can significantly reduce the concentration of ammonia gas and volatile organic compounds, has the advantages of long-acting deodorization, environmental protection and safety, and is suitable for the field of pet breeding.

The invention discloses a urinary system infection pathogen and drug resistance gene detection system and a kit. The detection system comprises forward and reverse primers which are respectively used for detecting escherichia coli, staphylococcus aureus, acinetobacter baumannii, klebsiella pneumoniae, enterococcus faecium, candida glabrata, proteus mirabilis, enterococcus faecalis, candida tropicalis, enterobacter cloacae, candida albicans, pseudomonas aeruginosa and streptococcus agalactiae; the forward primer and the reverse primer are respectively used for detecting the blaCTX-M gene of the extended spectrum beta-lactamase, the forward primer and the reverse primer are used for detecting the blaSHV gene of the extended spectrum beta-lactamase, and the forward primer and the reverse primer are used for detecting the blaTEM gene of the extended spectrum beta-lactamase. According to the forward and reverse primers for detecting the blaNDM gene of the extended-spectrum beta-lactamase, a detection sample is urine. According to the invention, common gram-negative bacteria, gram-positive bacteria and fungi can be detected at the same time, and the problem of missed detection of mixed infection in traditional culture is solved.

The invention discloses a compound micro-ecological preparation for aquatic products as well as a preparation method and application thereof, and belongs to the technical field of micro-ecological preparations. The microecological preparation disclosed by the invention comprises clostridium butyricum, bacillus licheniformis, enterococcus faecalis and lactobacillus plantarum. The microecological preparation is combined with concentrated cottonseed protein for use, can replace fish meal, is added into feed, can remarkably improve the immunocompetence, oxidation resistance and digestive enzyme activity of animals, and can improve the relative abundance of beneficial bacteria in intestinal tracts, inhibit the growth of pathogenic bacteria and regulate the microecological balance of the intestinal tracts after entering the intestinal tracts of the animals. According to the invention, aerobic bacteria and anaerobic bacteria are cooperatively used, oxygen in the surrounding environment is greatly consumed by bacillus licheniformis and enterococcus faecalis, the proliferation of beneficial bacteria such as clostridium butyricum and lactobacillus plantarum is promoted, and the probiotic effect is fully played.

The present invention provides a type of supramolecular hydrogel compound formed by self-assembly of effective ingredients of Macleaya cordata powder and flavonoid active molecules, a structure, a preparation method and an application. The supramolecular hydrogel compound has excellent selective antibacterial ability. While selectively killing pathogenic bacteria such as Staphylococcus aureus, it does not affect the activity of probiotics such as Bacillus subtilis and Enterococcus faecium in the intestine; it is particularly sensitive to methicillin-resistant Staphylococcus aureus (MRSA); it also has good anti-inflammatory effects and promotes wound healing. Among them, the natural supramolecular hydrogel formed by the self-assembly of effective ingredients of Macleaya cordata powder and flavonoid active molecules has a uniform morphology, good dispersion and stability, forms a gel without the need for excipients, and has the value of being developed into a carrier-free drug delivery preparation. The general structural formula of the compound is shown below:

The invention discloses a compound microbial agent for preventing and treating fusarium wilt of cotton and application of the compound microbial agent, and belongs to the technical field of biological prevention and treatment of plant diseases. The prepared compound microbial agent is obtained by mixed culture of clostridium butyricum JBH-BD1 fermentation centrifugate, enterococcus faecium JBHBIO-BSC1, glucose and bacillus subtilis JBH-BK8, the preparation method is simple, and industrialized production, popularization and application are facilitated. The compound microbial agent has an obvious inhibition effect on cotton fusarium wilt caused by fusarium oxysporum, and the bacteriostasis rate reaches 66.7%. The harm of the cotton fusarium wilt to cotton is effectively reduced by utilizing a biotechnology, meanwhile, compared with a chemical agent, the problems of environmental pollution and the like are effectively avoided, and the application prospect is very wide.

The invention discloses a composition containing three lactic acid bacteria strains and an application of the composition in prevention of EHP (Ethylene Hypothionyl Phthalate) of white shrimps. The three lactic acid bacteria strains provided by the invention are respectively enterococcus faecium EF08, lactobacillus plantarum LP28 and lactobacillus acidophilus LA1063. The mass ratio of the enterococcus faecium EF08 to the lactobacillus plantarum LP28 to the lactobacillus acidophilus LA1063 is 1 to 3 to 0.01. Experiments show that the P1 and P2 combined probiotic strain has the application of preventing and reducing EHP disease infection of the white shrimps. Therefore, the composition disclosed by the invention can be used for preparing a medicine for preventing microsporidia EHP infection.

The invention discloses enterococcus faecium capable of degrading three mycotoxins at the same time and application of the enterococcus faecium, and belongs to the technical field of microorganisms. The enterococcus faecium JBHBIO-BSC1 disclosed by the invention is preserved in the China Center for Type Culture Collection, and the preservation number of the enterococcus faecium JBHBIO-BSC1 is CCTCC (China Center for Type Culture Collection) NO: M 20241918. The enterococcus faecium disclosed by the invention has the most remarkable characteristic that the enterococcus faecium has an obvious degradation effect on the aflatoxin, the vomitoxin and the zearalenone, and the degradation rates of the aflatoxin, the vomitoxin and the zearalenone can respectively reach 74.67%, 85.83% and 82.12%. The enterococcus faecium disclosed by the invention is natural, safe, acid-resistant, alkali-resistant and high-temperature-resistant, and has relatively strong organic acid production capacity. In addition, the strain has an obvious inhibition effect on escherichia coli, salmonella and staphylococcus aureus, and is expected to be applied to the fields of food processing and microbial pharmacy.

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 discloses a wide-spectrum bacteriophage EFH2 capable of eliminating enterococcus faecalis suffering from humans and animals, and relates to the technical field of biology. The wide-spectrum bacteriophage is preserved in the China Center for Type Culture Collection on September 26, 2024, and the preservation number of the wide-spectrum bacteriophage is CCTCC NO: M 20242087. The wide-spectrum bacteriophage EFH2 is a newly found bacteriophage, has good tolerance under the conditions that the pH is 3-9 and the temperature is 4-60 DEG C, and has the titer as high as 2.31 * 10 < 8 > PFU / mL after being cultured for 8 hours under the condition that the MOI is 0.01. The wide-spectrum bacteriophage EFH2 is wide in antibacterial spectrum, short in incubation period, high in outbreak amount, capable of rapidly killing host bacteria, small in toxic and side effect, high in safety, wide in temperature and acid-base tolerance range, good in hydrophilicity and capable of well killing and disinfecting animals infected with multi-drug-resistant enterococcus and environments and food polluted by enterococcus.

The invention discloses an enterococcus faecalis bacteriophage and application thereof, and relates to the field of bioengineering, on the basis that E. faecalis YN772 is obtained through separation, E. faecalis YN772 is taken as host bacteria to be co-cultured with stomatological sewage which is not subjected to chlorine treatment, enterococcus faecalis lytic bacteriophage PEf772 is separated, the bacteriophage is preserved in China Center for Type Culture Collection (CCTCC), the preservation number is CCTCC NO: M 20241844, the preservation date is August 26, 2024, the preservation number is CCTCC NO: M 20241844, and the preservation number is CCTCC NO: M 20241844. According to the research on physiological characteristics, the phage PEf772 belongs to a tail phage and a myelocaudaceae phage, the infection temperature range is 20-42 DEG C, the optimum temperature is 37 DEG C, and the phage PEf772 has high-temperature tolerance and has activity when the pH value is 3-12. In addition, the bacteriophage PEf772 not only can efficiently and continuously remove an E.faecalis YN772 biological membrane, but also can effectively inhibit the growth of the E.faecalis YN772, and a new thought and a potential treatment strategy are provided for clinically treating the refractory periapical periodontitis caused by enterococcus faecalis.

The invention relates to the technical field of microorganisms, in particular to enterococcus faecalis capable of degrading uric acid and application of the enterococcus faecalis, the enterococcus faecalis is named as Enterococcus faecalis SX3, and the preservation number of the enterococcus faecalis is CCTCC NO: M 2025248. The enterococcus faecalis has the advantages of being wide in antibacterial spectrum, rapid in growth, high in stress resistance, high in biological safety and the like, and important application value is provided for formulating a scheme for degrading uric acid.

The invention discloses a stichopus japonicus fry cultivation method, and belongs to the technical field of stichopus japonicus fry cultivation. Comprising the following steps: splashing a fermented feed containing a bacillus subtilis fermentation liquid and a bacterial liquid containing an enterococcus faecalis fermentation liquid and a lactobacillus casei fermentation liquid into a culture pond of which the pond bottom is paved with a polyethylene corrugated plate substratum; the fermented feed and the bacterial liquid are continuously splashed until the water quality in the culture pond is clear and transparent, the feed on the corrugated plate is fluffy and is in a short villus shape, and a stable beneficial bacterium phase is formed; peeling off the juvenile sea cucumbers on the 40th day after metamorphosis and attachment, distributing the juvenile sea cucumbers into a cultivation pond for cultivation, and feeding fermented feed and bacterial liquid every day. The method is applied to the aspect of stichopus japonicus fry cultivation, the problems that in existing stichopus japonicus fry production, diseases occur frequently, most fry breeding fields face poor fry quality, and the yield is low are solved, a stable cultivation environment dominated by beneficial bacteria is built, external multi-dimensional disease sources are buffered, blocked and eliminated continuously, and the survival rate of the stichopus japonicus fry is increased. The stichopus japonicus seedlings can grow in the environment without stress.

The invention discloses a compound microecological preparation, fermentation liquor and application of the compound microecological preparation in laying hen production. The compound micro-ecological preparation is prepared from clostridium butyricum NIP1021, bacillus cereus 2022B1, bacillus licheniformis 2022B2 and enterococcus faecium 2022B6. The fermentation liquor of the compound micro-ecological preparation can promote the growth performance levels of the Haillan grey laying hens, such as the final weight and the like; the development of thymus and bursa of Fabricius immune organs of laying hens can be promoted; the content of serum immune globulin IgG and serum-related immune cell factors IL-1beta, IL-6 and TNF-alpha of laying hens is remarkably increased, so that the serum nonspecific immune level of animal bodies is improved; according to the method, the intestinal villus area of the laying hens is increased, the nutrient absorption capacity of the laying hens is improved, cecum flora diversity and species abundance are increased, dominant flora categories are thick-wall flora and bacteroides to regulate intestinal flora balance, and the method has positive significance in maintaining intestinal health.

The invention discloses preparation and application of a hand mycin derivative with gram-positive bacterium activity resistance, and belongs to the technical field of medicine preparation. According to the present invention, the ctd gene cluster is subjected to heterologous expression in the strain Streptomyces lividans TK64, such that the obtained hand mycin derivatives Carpatamide N and Carpatamide O show excellent biological activity on the gram-positive bacteria; the MIC (minimal inhibitory concentration) values of the Carpamide N and the Carpamide O on streptococcus faecium and enterococcus faecium are 4 mu g / mL and 1 mu g / mL respectively; the MIC (minimal inhibitory concentration) values for staphylococcus aureus and bacillus subtilis are respectively 0.25 mu g / mL and 0.125 mu g / mL, the MIC values for MRSA (Methicillin-Resistant Staphylococcus Aureus) are respectively 1 mu g / mL and 0.5 mu g / mL, and the Gram-positive bacterium resisting activity of the compound is equivalent to or better than that of vancomycin.

The invention provides a primer group, a kit and a method for simultaneously detecting 11 microorganisms and diagnosing chronic endometritis intrauterine infection. The primer group is used for detecting the existence of 11 chronic endometritis pathogens: chlamydia trachomatis, enterococcus faecalis, escherichia coli, trichomonas vaginalis, klebsiella pneumoniae, mycoplasma hominis, neisseria gonorrhoeae, staphylococcus, streptococcus, reproductive mycoplasma and ureaplasma urealyticum. The primer group is used for performing multiple joint detection on chronic endometritis related pathogens, has high specificity and sensitivity, and is adaptive to an endometrial tissue sample. The invention provides a method for simultaneously detecting 11 microorganisms for diagnosing chronic endometritis intrauterine infection, which comprises the following steps of: collecting an endometrial sample by adopting a disposable sterile endometrial sampler, detecting 11 microorganisms in the endometrial sample by adopting a multiplex PCR (Polymerase Chain Reaction) technology, and accurately detecting the intrauterine microbial infection condition. Meanwhile, more accurate technical support is provided for clinically identifying whether pathogenic bacteria causing chronic endometritis exist or not, and clinical doctors can comprehensively consider medication guidance conveniently.

Provided is a growth inhibitor for Clostridioides difficile. A growth inhibitor for Clostridioides difficile, comprising killed Enterococcus faecalis. Also provided are a parenteral pharmaceutical preparation, a bactericide, a disinfectant, an antibacterial agent, a sanitizer or a detergent for inhibiting the growth of Clostridioides difficile.

According to the invention, the traditional fermented koumiss in Xinjiang is collected, two novel multifunctional probiotic strains, namely, the lactobacillus plantarum SR6 GDMCC NO.66817 strain and the enterococcus faecalis SM5 GDMCC NO.66816 strain with good compatibility are separated and screened out, and the two strains have the characteristics of reducing blood fat, reducing cholesterol, removing triglyceride, resisting oxidation and antagonizing pathogenic bacteria, and have the characteristics of good cholate and gastrointestinal tract tolerance, high survival rate and good safety. The growth characteristics and compatibility of the two strains are improved; the inhibition rate of cholesterol esterase and pancreatic lipase; the method comprises the following steps: evaluating the triglyceride removal rate, antioxidant activity, pathogenic bacterium resistance, artificially simulated gastrointestinal fluid tolerance, strain drug resistance and safety, compounding lactobacillus plantarum SR6 and enterococcus faecalis SM5 strains according to a ratio of 1: 1 to prepare a freeze-dried bacterial agent, and keeping good survival rate (pgt; 0.05) and functional characteristics, the strain can be used as a functional direct vat set starter and is directly applied to production of fermented dairy products, and the biological activity of food is improved.

The invention discloses an enterococcus faecium XL, and the preservation number of the enterococcus faecium XL is CGMCC (China General Microbiological Culture Collection Center) No. 28133. The enterococcus faecium XL and the application thereof have the following beneficial effects: 1, the enterococcus faecium XL provided by the invention can grow and metabolize under an oil reservoir condition to generate lactic acid organic acid, dissolve carbonate in a rock stratum, increase the permeability of the rock stratum, degrade heavy components in crude oil, relieve crude oil blockage in an oil layer, increase the liquid amount and improve the oil reservoir quality; the oil recovery rate is improved; 2, the enterococcus faecium XL is applied to microorganism single-well throughput, the average single-well oil increasing amount is greater than 400 tons, and the validity period is more than 200 days; and 3, the enterococcus faecium XL is applied to microbial oil displacement, the average daily oil increase of a well group is more than 5 tons, and the water content drop amplitude is more than 5%.

The invention relates to a biomarker for individual recognition and application thereof, and relates to the technical field of biology. The biomarker comprises at least one of the following microorganisms: propionibacterium acnes, staphylococcus epidermidis, marine paracoccus, streptococcus, rhodococcus fence celebrating, staphylococcus, pseudomonas, streptococcus sanguineus, achromobacter xylosoxidans, acinetobacter calcoaceticus, acinetobacter johnsonii, staphylococcus lentus, pseudomonas toralaris and brevundimonas vesicularis. Or enterococcus faecium. The biomarker can provide analysis with higher resolution in the aspect of differential strain information, has a better distinguishing effect, higher accuracy and sensitivity on individual recognition, and can be used as a new technical means for supplementing forensic individual recognition.

The invention discloses a humic acid type straw source microbial agent which comprises the following strains: enterococcus faecium, bacillus subtilis, lactobacillus plantarum and saccharomyces cerevisiae. The method has the advantages that turfy soil, biogas residues, biogas slurry and a certain amount of agricultural waste are added into compost with straw microbial agents and livestock and poultry manure as main materials to adjust a proper carbon nitrogen ratio, and more importantly, a compound microbial agent for strengthening the process of the humic acid type straw source microbial agent is inoculated; compared with natural composting fermentation, the composting efficiency and stability are improved, and the fertilizer efficiency and fertility of the organic fertilizer and the resource utilization efficiency of waste are improved.

The invention provides an application of GSK2018682 in preparation of a medicine for resisting gram-positive bacterial infection, and the GSK2018682 has a CAS number of 1034688-30-6. The invention also provides an application of the GSK2018682 in preparation of a medicine for resisting gram-positive bacterial infection. According to the technical scheme, the novel medical application of the GSK2018682 is disclosed, and the GSK2018682 has good antibacterial activity and anti-biofilm activity on various gram-positive bacteria and can inhibit growth of staphylococcus aureus, staphylococcus epidermidis, enterococcus faecalis, enterococcus faecium and the like and formation of biofilms.

The invention discloses a method for fermenting vinasse feed through mixed bacteria, and belongs to the field of microbial fermentation. The invention firstly provides a microbial agent for increasing the content of crude protein in fermented vinasse. The microbial agent contains a bacillus subtilis liquid, a corynebacterium glutamicum liquid, a saccharomyces cerevisiae liquid, an enterococcus faecalis liquid and a bifidobacterium animalis liquid. The invention also provides an application of the microbial agent in preparation of a fermented vinasse feed. The contents of crude protein, crude fat and amino acid in the fermented vinasse feed are increased. Through mixed fermentation, the content of amino acid in the vinasse is increased, the content of lysine is increased by 108.33%, and the content of threonine is increased by 59.09%.

The invention relates to the technical field of microorganisms, in particular to mixed bacteria fermentation liquor as well as a preparation method and application thereof. Bacterial strains in the mixed fermentation liquor comprise clostridium butyricum, enterococcus faecium and bacillus. The preparation method of the mixed bacteria fermentation liquor comprises the following steps: culturing the strains in the mixed bacteria fermentation liquor in a mixed bacteria fermentation culture medium to obtain the mixed bacteria fermentation liquor; wherein the bacterial strains comprise clostridium butyricum, enterococcus faecium and bacillus. According to the mixed bacterium fermentation liquor and the preparation method and application thereof, coexisting culture of donkey source enterococcus faecium, donkey source bacillus and donkey source clostridium butyricum can be achieved through the mixed bacterium fermentation liquor, and meanwhile the mixed bacterium fermentation liquor has the excellent effects of producing compound enzyme and inhibiting pathogenic bacteria and can serve as a feed additive to improve the reproductive performance of a female donkey and improve the growth performance of a donkey foal; the occurrence of donkey foal diarrhea is reduced, so that the economic benefit of donkey breeding is increased.

The invention provides an enterococcus faecium probiotic-prebiotics composite tablet and a preparation method thereof, and belongs to the technical field of microbial preparations. The tablet is prepared by taking enterococcus faecium (preservation number: CGMCC NO.33919) as a core active component, matching prebiotics adapted to the intestinal tracts of old people, a high-stability protective agent and mild auxiliary materials through a specific process. The tablet can efficiently adjust the intestinal flora structure of the old people, inhibit the proliferation of harmful bacteria in the intestinal tract and enhance the intestinal barrier function of the old people, so that the functional diarrhea and antibiotic-related diarrhea of the old people are relieved, and the tablet is moderate in hardness, easy to swallow, free of intestinal irritation and high in normal-temperature storage stability; the problems that an existing intestinal preparation is poor in adaptability to intestinal tracts of old people, strain activity is prone to inactivation, and swallowing is difficult are solved.

The invention discloses an enterococcus faecalis bacteriophage vBEfaPFA2, a bacteriophage composition and application of the enterococcus faecalis bacteriophage vBEfaPFA2, the enterococcus faecalis bacteriophage vBEfaPFA2 has a specific lysis effect on enterococcus faecalis and also has a cross-species lysis effect on salmonella, the acid-base adaptability of the bacteriophage is high, and the bacteriophage vBEfaPFA2 and the bacteriophage composition can be used for preparing the enterococcus faecalis bacteriophage The enterococcus faecalis bacteriophage can be used as an active component to be prepared into the bacteriophage composition or the bacteriophage pharmaceutical preparation, the bacteriophage composition or the bacteriophage pharmaceutical preparation is applied to preparation of a medicine or a bacteriostatic agent for preventing and treating enterococcus faecalis and salmonella infection, the enterococcus faecalis bacteriophage and the bacteriophage composition are safe to use, high in yield and easy to industrially produce, and due to the cross-species lysis performance, the bacteriophage can be The method has the advantages of wide splitting spectrum, wide application range and good application prospect.

The invention discloses a walnut probiotic fermented beverage and a preparation method thereof. The beverage is prepared from walnut kernels as a preparation raw material through probiotic fermentation. The walnut kernels are used as preparation raw materials, the beverage is prepared through probiotic fermentation, and the beverage has the advantages of being good in taste, rich in nutrient substance, high in oxidation resistance and the like. The lactobacillus plantarum subsp. Plantarum RF17 and the lactobacillus rhamnosus GOLDGUT-M520 are combined for fermentation, so that the content of total flavonoids in the fermented beverage is increased, and the enterococcus faecalis 2010-JR-01 and the lactobacillus paracasei LCX25 are combined for fermentation, so that the content of total phenols in the fermented beverage is increased.

The invention discloses an enterococcus faecium strain with high lactic acid yield and application of the enterococcus faecium strain, and belongs to the technical field of biology. According to the invention, ultraviolet mutagenesis, diethyl sulfate mutagenesis, single mutagenesis of 5-brorouracil and compound mutagenesis of enterococcus faecium are adopted to finally obtain an enterococcus faecium strain with better acid production performance and stable genetic performance, the enterococcus faecium strain is preserved in China General Microbiological Culture Collection Center (CGMCC) on September 2, 2024, and the preservation number of the strain is CGMCC No.31810. The pH value of the silage can be reduced, so that the growth of other microorganisms including pathogenic bacteria is inhibited, the nutritional ingredients of the silage are maintained, the palatability of the feed is improved, and the livestock yield is increased; meanwhile, the quality of the silage is ensured, so that the enterococcus faecium strain has relatively high application value in the fields of animal husbandry and the like.

The invention provides an antibacterial peptide RB3 and application thereof. The amino acid sequence of the antibacterial peptide RB3 is as shown in SEQ ID NO: 1. The antibacterial peptide RB3 has remarkable antibacterial activity on five endometritis pathogenic bacteria, namely, E. coli, K. pneumoniae, P. mirabilis, P. aeruginosa and E. faecium, can be used for inhibiting the growth and proliferation of the endometritis pathogenic bacteria and maintaining a normal flora structure and an immune microenvironment of endometrium, and can be used for preparing the antibacterial peptide RB3. The antibacterial peptide RB3 has the advantages that the antibacterial peptide RB3 has obvious antibacterial activity on the five endometritis pathogenic bacteria, namely, E. coli, K. pneumoniae, P. mirabilis, P. aeruginosa, P. mirabilis, P. aeruginosa and E. faecium; according to the present invention, the antibacterial peptide RB3 can be directly obtained through solid-phase synthesis, such that the effective prevention and treatment of endometritis can be achieved, the important significance on the prevention and the clinical treatment of endometritis can be provided, and the antibacterial peptide RB3 can be directly obtained through solid-phase synthesis so as to easily achieve the large-scale preparation and the clinical large-scale application of the antibacterial peptide RB3.

The invention provides a beta-diketoamide compound and application thereof in preparation of a gram infection resistant drug, the structural formula of the beta-diketoamide compound is as shown in formula (1), in the formula (1), R1 is H or halogen; r2 is nitro, alkyl, halogen or methoxyl. The beta-diketoamide compound disclosed by the invention comprises gram-positive bacteria such as staphylococcus aureus, enterococcus faecalis, enterococcus faecium and staphylococcus epidermidis and other clinical isolates, and shows antibacterial activity; after being combined with polymyxin, the compound has synergistic bacteriostatic activity on gram-negative bacteria such as acinetobacter baumannii, klebsiella pneumoniae, escherichia coli and pseudomonas aeruginosa, and can remove biofilms formed by staphylococcus aureus and enterococcus faecalis.