Aspergillus coronatus loop-mediated isothermal amplification detection kit and detection method thereof

A ring-mediated isothermal, coronoid process technology, which is applied in microorganism-based methods, biochemical equipment and methods, and microbial determination/inspection, etc. The problem of powdery cysts, etc., to achieve the effect of high sensitivity and strong specificity

Pending Publication Date: 2019-01-11
周赞虎
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

National standards require the detection of S. coronoidis, but the traditional classification is cumbersome and requires expensive instruments such as scanning electron microscopes. Ordinary inspection and testing institutions cannot meet the requirements for accurate detection and identification; emerging DNA identification technologies can quickly and accurately identify microorganisms. The common ones are Ordinary PCR method and fluorescent quantitative PCR method (Li Hong et al., 2015; Xie Ronghui et al., 2017). The ordinary PCR method requires a PCR instrument and a gel imaging system, while the fluorescent quantitative PCR method requires an expensive fluorescent quantitative PCR instrument, grass-roots testing institutions and the general public. It is difficult for food processing enterprises to popularize the detection method
The loop-mediated isothermal amplification technique does not require expensive equipment and can detect target organisms accurately and sensitively (Zhou Zanhu et al., 2014). At present, there is no report on the detection of S. coronis by the loop-mediated isothermal amplification technique (Wang Zhigang et al., 1992; Chen Yongqiang et al., 2014)

Method used

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  • Aspergillus coronatus loop-mediated isothermal amplification detection kit and detection method thereof
  • Aspergillus coronatus loop-mediated isothermal amplification detection kit and detection method thereof
  • Aspergillus coronatus loop-mediated isothermal amplification detection kit and detection method thereof

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Experimental program
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Effect test

Embodiment 1

[0077] Embodiment 1: specificity experiment

[0078] Staphylococcus aureus, Salmonella, Listeria monocytogenes (ATCC19115), Bacillus subtilis, Bacillus cereus, common pathogenic bacteria in food, and other Aspergillus or loose capsules commonly found in Fuzhuan brick tea: Aspergillus flavus, red Aspergillus, Aspergillus intertype, Aspergillus amsterdamensis, Aspergillus terreus, Aspergillus cereus, and Aspergillus rubrum for verification. Extract the genomic DNA of the above-mentioned bacteria, use the bacterial and fungal genomic DNA extraction kits to extract the respective bacterial DNA, and then detect according to the method of the kit of the present invention. The experimental results are shown in the accompanying drawings figure 1 . The results of the LAMP specificity experiment of LAMP of coronoides showed that the common food pathogens Staphylococcus aureus, Salmonella, Listeria monocytogenes, Bacillus subtilis, Bacillus cereus, etc. amplified, and other similar and...

Embodiment 2

[0079] Embodiment 2: Sensitivity experiment

[0080] Get 1ml of the PDA culture medium for 96 hours, and carry out gradient dilution with 10 times. Each dilution of the bacterial solution takes 200 microliters and coats the PDA plate for colony counting; meanwhile, the bacterial solutions of each dilution are respectively Take 1mL to extract DNA respectively. Then detect by the kit method of the present invention, the experimental results are shown in the accompanying drawings figure 2 . figure 2 shows that tubes 1-5 all show green, and 10 5 The average plate colony count corresponding to the dilution bacterial concentration is 23CFU / mL (the specific values ​​are 20 and 26CFU / mL respectively), and the reaction tubes all show green; 10 6 Dilution tubes are light orange, 10 6 The bacterial concentration of the dilution degree is 2.5CFU / mL (the specific values ​​are 1 and 4CFU / mL respectively); the DNA extracted at 23CFU / mL (1mL bacterial liquid is extracted with 80 microli...

Embodiment 3

[0081] Embodiment 3: the detection of actual sample

[0082] Take 6 kinds of teas sold on the market for testing, 3 kinds of Fuzhuan tea, 3 kinds of non-Fuzhuan tea (respectively Pu'er tea, Tieguanyin and Wuyi rock tea), the details (company name production date) are as follows: Fuzhuan tea P1 (Hunan Province Yiyang Tianwen Tea Co., Ltd. Jin Fu Tea three-year-old production date 20140619), Fu brick tea P2 (Hunan Zunpin Tea Co., Ltd. hand-built Fu brick production date 20150520), Fu brick tea P3 (Hunan Black Beauty Tea Co., Ltd. hand-built Fu brick tea Production date 20150831), Puer tea (Puer City Jindian Tea Co., Ltd. tangerine peel Puer small green orange production date 20180222), Tieguanyin (production date 20181001 of Tieguanyin Cooperative of Zhongmin Hongtai Tea Professional Cooperative in Anxi County, Fujian Province), Wuyi Rock Tea (Fujian Province Anxi County Ruyi Tea Factory Dahongpao production date 20180809). Take 10g of each type of tea, add 30mL of sterile wate...

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Abstract

The invention relates to a biological detection reagent, in particular to an Aspergillus coronatus loop-mediated isothermal amplification detection kit and a detection method thereof. According to thegenome sequence information of Aspergillus coronatus in the NCBI gene bank, the genome of aspergillus coronatus was compared with that of non-aspergillus coronatus, A set of specific primers for detecting LAMP of Aspergillus coronarius was designed according to the unique gene sequence of Aspergillus coronarius. Based on the primers, a set of LAMP detection method was established. The method hasthe characteristics of high specificity, high sensitivity, low cost, fast and easy operation.

Description

technical field [0001] The invention relates to a biological detection kit, in particular to a detection kit and a detection method for the isothermal amplification mediated by the coronoid sacrum ring. Background technique [0002] Fuzhuan brick tea grows into "golden flowers" through the "flowering" process under specific temperature and humidity conditions. Fuzhuan brick tea is a unique tea variety in China. There are few studies on "Golden Flower" abroad, and domestic research is relatively lagging behind. Based on the growth and morphological characteristics of the fungus, different researchers named it Aspergillus chevalieri), Aspergillus cristatum, Aspergillus spiculosus, and A. chevalieri var. intermidius of the Aspergillus gray-green group; until later, scanning electron microscopy was used to observe the ascus in detail The submicroscopic structure of spores and conidia is used to identify them. In "Mycology of China—Volume V: Aspergillus and related sexual types"...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12Q1/6844C12Q1/04C12R1/645
CPCC12Q1/6844C12Q2531/119C12Q2563/107
Inventor 周赞虎张海艳方成俊温建荣庄燕煌何艺贞陈春香苏雪勤许俊霖
Owner 周赞虎
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