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• W4387195409 abstract "A false negative result is one of the major problems in nucleic acid detection. Failure to screen positive samples for pathogens or viruses poses a risk to public health. This situation will lead to more serious consequences for infectious pathogens or viruses. At present, the common solution is to introduce exogenous or endogenous internal control. Because it amplifies and is detected separately from the target gene, it cannot avoid false negative results caused by DNA extraction failure or reagent inactivation. There is an urgent need for a simple and reliable method to solve the false negative problem of nucleic acid detection. We established a chip and an on-chip detection method for the integrated detection of target genes and internal control using the CRISPR system in LAMP amplification products. The chip is processed from a low-cost PMMA board and has three chambers and some channels. After adding the sample, the chip only needs to be rotated twice, and the sample enters three chambers successively depending on its gravity for dual LAMP reaction and CRISPR detections. With a portable LED blue light exciter, visual fluorescence detection is realized. Whether the detection result is positive, negative, or invalid can be determined according to the fluorescence in the CRISPR chamber for target gene and CRISPR chamber for internal control. In this study, the detection of Salmonella enterica in Fenneropenaeus chinensis was taken as an example. The results showed good specificity and sensitivity. It could detect as low as 15 copies/μL of Salmonella enterica. The on-chip detection solves the problem of aerosol contamination and false negative results. It has the advantages of high sensitivity, high specificity, high accuracy, and low cost. This research will advance the development of nucleic acid detection technology, providing a new and reliable strategy for POCT detection of pathogenic bacteria and viruses." @default.
• W4387195409 created "2023-09-30" @default.
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• W4387195409 date "2023-11-01" @default.
• W4387195409 modified "2023-10-09" @default.
• W4387195409 title "CRISPR/Cas12a-assisted visible fluorescence for pseudo dual nucleic acid detection based on an integrated chip" @default.
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• W4387195409 doi "https://doi.org/10.1016/j.aca.2023.341860" @default.
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