1. Simultaneous detection of multiple bacterial and viral aquatic pathogens using a fluorogenic loop‐mediated isothermal amplification‐based dual‐sample microfluidic chip
- Author
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Qian-Jin Zhou, Jing-Lei Jin, Yan Zhou, Shao Xinbin, Lei Wang, Jiong Chen, Ming-Yun Li, Xiu-Rong Su, Jian-Fei Lu, Wang Yaohua, Shang-Yang Li, and Yan Maocang
- Subjects
0301 basic medicine ,Veterinary (miscellaneous) ,Microfluidics ,White spot syndrome ,Loop-mediated isothermal amplification ,Aquatic Science ,Sensitivity and Specificity ,Virus ,Microbiology ,Fish Diseases ,03 medical and health sciences ,White spot syndrome virus 1 ,Limit of Detection ,Crustacea ,Animals ,Edwardsiella tarda ,Pathogen ,Vibrio ,biology ,Vibrio harveyi ,Densovirinae ,Fishes ,Reproducibility of Results ,04 agricultural and veterinary sciences ,biology.organism_classification ,DNA Virus Infections ,Aeromonas hydrophila ,Iridoviridae ,030104 developmental biology ,Molecular Diagnostic Techniques ,Mollusca ,040102 fisheries ,0401 agriculture, forestry, and fisheries ,Gram-Negative Bacterial Infections ,Nucleic Acid Amplification Techniques ,Kidney necrosis - Abstract
Rapid and user-friendly diagnostic tests are necessary for early diagnosis and immediate detection of diseases, particularly for on-site screening of pathogenic microorganisms in aquaculture. In this study, we developed a dual-sample microfluidic chip integrated with a real-time fluorogenic loop-mediated isothermal amplification assay (dual-sample on-chip LAMP) to simultaneously detect 10 pathogenic microorganisms, that is Aeromonas hydrophila, Edwardsiella tarda, Vibrio harveyi, V. alginolyticus, V. anguillarum, V. parahaemolyticus, V. vulnificus, infectious hypodermal and haematopoietic necrosis virus, infectious spleen and kidney necrosis virus, and white spot syndrome virus. This on-chip LAMP provided a nearly automated protocol that can analyse two samples simultaneously, and the tests achieved limits of detection (LOD) ranging from 100 to 10-1 pg/μl for genomic DNA of tested bacteria and 10-4 to 10-5 pg/μl for recombinant plasmid DNA of tested viruses, with run times averaging less than 30 min. The coefficient of variation for the time-to-positive value was less than 10%, reflecting a robust reproducibility. The clinical sensitivity and specificity were 93.52% and 85.53%, respectively, compared to conventional microbiological or clinical methods. The on-chip LAMP assay provides an effective dual-sample and multiple pathogen analysis, and thus would be applicable to on-site detection and routine monitoring of multiple pathogens in aquaculture.
- Published
- 2020
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