78 results about "Bacteria identification" patented technology

A sample is tested for the presence of bacteria, such as in an automatic blood culturing apparatus. If bacteria are determined to be present, a bacteriophage-based bacteria identification process is performed to identify the bacteria present. A plurality of bacteria detection processes, such as a blood culture test and Gram stain test may be carried out prior to the bacteria identification process. A bacteriophage-based antibiotic resistance test or antibiotic susceptibility test is also conducted on the sample.

The invention relates to a method for separating Aeromonas molluscorum producing tetrodotoxin from Takifugu fasciatus tissues and a fermentation culture method of the Aeromonas molluscorum as well as a detection method of the produced tetrodotoxin. The method for separating the Aeromonas molluscorum producing the tetrodotoxin from the Takifugu fasciatus tissues comprises a bacteria separation method, a bacteria identification method, a bacteria fermentation culture method, a competitiveness ELISA (Enzyme Linked Immunosorbent Assay) detection method and an LC-MS (Liquid Chromatograph-mass Spectrometry) detection method of the tetrodotoxin produced by the Aeromonas molluscorum, and the like. In the invention, by separating bacteria from Takifugu fasciatus ovaries and adopting a TCBS (Thiosulfate Citrate Bile (salt) Sucrose (agar)) culture medium for screening, the Aeromonas molluscorum capable of producing the tetrodotoxin is separated from blowfish bodies for the first time; the separated bacteria is identified by adopting a 16 SrDNA method; the competitiveness ELISA detection method and the LC-MS detection method are both firstly adopted for the tetrodotoxin produced by the separated Aeromonas molluscorum; and the produced tetrodotoxin and tetrodotoxin extracted from the blowfish bodies are determined to be the same substance; in addition, the separated Aeromonas molluscorum can massively separate the tetrodotoxin from the bacteria after being cultured.

The system described herein for bacterial identification can be used as a point-of-care or lab-based diagnostic system. In some implementations, the system can be used to detect other foreign agents within blood or other samples. The system can include disposable microfluidic cartridges that are removable from the system. The microfluidic cartridges can receive a sample, such as a blood sample, that is suspected of containing bacterial cells and separate the bacterial cells from the blood sample. Once the bacterial cells are separated from the blood, the system can introduce the recombinant detector bacteriophages into the system that can infect the bacterial cells. The system can then detect the expression of reporter genes from the recombinant detector bacteriophages.

The invention discloses a bacteria identification kit, including indicator, culture medium and testing carbon sources. Thiazole blue is used as the indicator for indicating that whether bacteria can use the testing carbon sources. The invention is a kit which uses a 96-microtitor plate that is prearranged with the culture medium with 95 different carbon sources and is used for the rapid identification of carbon source utilization spectrum. One hole is not added with the carbon source for the comparison. The kit of the invention includes some carbon sources for detecting the specific physiological characteristics and common carbon sources. That using the thiazole blue as the indicator is convenient for naked eyes to observe that whether the bacteria grows and uses the carbon sources. And an eliasa can be used at the wavelength of 600nm to rapidly measure the growing condition of the bacteria. The kit of the invention has the advantages of low cost, short identification time, high sensitivity, convenient operation, accuracy, etc. the result can be made within 20-24 hours. And gram negative bacteria and positive bacteria can be identified.

The invention provides a reagent for separating bacteria from positive blood. The reagent comprises an agent A, an agent B and an agent C, wherein the agent A is used for dissolving the hemocyte froma blood sample of a blood culture; the agent B is used as a cleaning agent; the agent C is used for breaking the pathogenic bacteria cytoderm and promoting the protein release in the cells; and the agent A is at least one of saponin solution and SDS or other surface active agent capable of cracking the hemocyte. The invention also provides a method for separating bacteria from positive blood and the method for identifying bacteria. The method comprises the following steps: cracking the hemocyte by using the agent A; cleaning the cell fragments and impurities by using the agent B; breaking thepathogenic bacteria cytoderm by using the agent C, releasing the bacteria protein, taking the supernate containing the bacteria protein and settling a sample to be identified; dropping the sample to be identified into a vacant side on a target plate; drying under room temperature and then covering a substrate on the sample; drying under room temperature; and putting onto a machine for detecting. The bacteria can be quickly identified, the result can be acquired within half an hour, the detection result is high in reliability and the interference is less.

The invention provides a method and a system for identifying bacteria and analyzing drug sensitivity, relating to the technical field of medical treatment reagent type detection. Through digital and automatic comparative analysis, a required result is obtained. Compared with the prior art, the invention provides a system for automatically identifying bacteria/experimenting drug sensitivity for the medical microorganism examination work so that the bacteria identification/drug experimenting is more accurate, simpler, micro and rapid.

The invention discloses a liquid culture medium for detecting beta-galactosidase and application of the liquid culture medium in bacterium identification. Every 1,000 ml of the liquid culture medium for detecting beta-galactosidase is prepared from 5-50 g of nutrient substances, 2-10 g of sodium chloride, 50-250 ml of 0.2 mol/L PBS, 0.5-4 g of a specificity chromogenic substrate, 0.5-4 g of an enzyme induction agent, 0.1-10 ml of a cosolvent and 0.1-10 ml of a protection agent. According to the culture medium, 5-bromine-4-chlorine-3-indol-beta-D-galactoside is used as a substrate, the low-toxic cosolvent and the protection agent are adopted, and beta-galactosidase of living bacteria can be accurately and effectively detected through a liquid method; the culture medium can be applied to a commercial identification testing card, a drying substrate in a micro hole can be effectively redissolved, beta-galactosidase of the living bacteria is detected, the negative and positive results are clearer, and the identification accuracy for clinical common gram negative and positive bacteria is improved.

Disclosed are methods and systems for the detection of bacteria in a sample. The methods comprises contacting the sample with an antibacterial agent and a bacteria identification sensor, and involves the permeabilization of the bacteria by the antibacterial agent, and the subsequent detection of an efflux of potassium ions using a bacteria identification sensor comprising a potassium-sensitive ISFET. Also disclosed are bacteria identification sensor comprising a potassium-sensitive ISFET useful in the practice of the disclosed methods.

The invention provides a screening method of salt-tolerant growth-promoting rhizosphere bacteria, a strain and application of the strain. The screening method comprises the following steps: collecting soil attached to the surfaces of root systems of different types of saline-alkali soil plants as a separation source; diluting the obtained separation source, respectively placing the diluted separation source in LB solid culture media with different salinity concentrations for coating culture, and selecting monoclonal bacteria; carrying out secondary screening on the obtained multiple primary screening rhizosphere bacterial colonies to obtain rhizosphere bacterial single colonies; carrying out bacterial identification on the bacterial colonies to obtain various strains of different types; performing a germination rate test on multiple different types of bacteria, and screening out strains capable of improving the germination rate of the seeds; carrying out further salt tolerance screening on the screened strains, and selecting strains with good salt tolerance; and carrying out growth-promoting function screening on the strains with good salt tolerance, and finally screening out the strains with the growth-promoting function. According to the method, the salt-tolerant rhizosphere growth-promoting bacteria are screened out from the soil attached to the surfaces of the plant root systems of the saline-alkali soil, and the growth condition of crops in the saline-alkali soil can be improved.

The embodiment of the invention provides an automatic bacteria identification device and method, automatic test equipment, as well as a urine analyzer. The automatic bacteria identification device includes a detection unit and a classification unit, the detection unit is used for detection of a regional part, in an input image, which may contain bacteria, so as to generate an output image containing the regional part, the classification unit is used for extracting a feature from the regional part detected by the detection unit, and identifies if the regional part is the bacteria on the basis of the feature; the feature is at least one from area, area ratio, cyclic shape, aspect ratio, contrast ratio and texture complexity of the regional part. According to the automatic bacteria recognition device and method of the embodiment of the invention, the bacteria can be automatically identified from the input image, and then a scheme, which is very effective in aspects of accuracy, cost and time, can be obtained.

The preset invention belongs to the technical field of microorganism separation and discloses a pit mud microorganism separation method. The pit mud microorganism separation method comprises the following steps: step 1, collecting pit mud by a five-point sampling method; step 2, weighing 10 g of a pit mud sample to prepare a pit mud suspension; step 3, after water bath, inoculating the pit mud suspension into an enrichment culture medium, coating the enrichment culture medium into a separation culture medium by adopting a gradient dilution manner, placing the inoculated separation cultured medium into an anaerobic tank, performing separation culture, and performing plate streaking purification on microorganism colonies with various different characteristics to obtain single microorganism colonies; and step 4, streaking and separating the obtained single microorganism colonies and conducting caproic acid bacteria identification of the separated strain. Vinasse immersion liquid is used as the culture medium to simulate primary growth environment of microorganisms, so that the microorganisms in the pit mud can rapidly adapt to the new environment, activation time of the microorganismsis shortened, and microorganism separation efficiency can be improved.

The invention discloses a high-throughput separation culture method for crop root system microbiome. The method comprises the following steps of S1, performing gradient dilution separation culture oncrop root system bacteria; S2, extracting DNA of cultured bacteria; S3, carrying out two-step PCR on DNA sub-holes, namely amplifying 16S variable regions V5-V7 by taking 799F and 1193R as primers inthe first step and taking 799F-2 containing hole barcode and 1193R-2 containing plate barcode as primers in the second step to obtain a bacterium identification library; S4, carrying out sequencing analysis; and S5, constructing the crop root system microbiome. By means of the method, a large number of bacteria can be separated and cultured in a short time with less manpower, the types of the bacteria can be rapidly identified through a one-key sequence analysis process, crop root microbiome can be assembled, and technical support is provided for obtaining more crop root microbial resources.

The present invention provides compositions, methods and kits for bacteria identification and anti-microbial susceptibility testing for the treatment of, for example, acute and chronic infections including infectious disease. The present invention is particularly useful in the identification of bacteria causing mastitis, and to antibiotic susceptibility testing to facilitate in the identification of an appropriate treatment for mastitis.