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001     1019313
005     20240116084327.0
024 7 _ |a 10.3390/ijms242417272
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024 7 _ |a 1661-6596
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024 7 _ |a 10.34734/FZJ-2023-05287
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100 1 _ |a Abuawad, Abdalhalim
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245 _ _ |a DNA Sensor for the Detection of Brucella spp. Based on Magnetic Nanoparticle Markers
260 _ _ |a Basel
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|b Molecular Diversity Preservation International
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520 _ _ |a Due to the limitations of conventional Brucella detection methods, including safety concerns, long incubation times, and limited specificity, the development of a rapid, selective, and accu-rate technique for the early detection of Brucella in livestock animals is crucial to prevent the spread of the associated disease. In the present study, we introduce a magnetic nanoparticle marker-based biosensor using frequency mixing magnetic detection for point-of-care testing and quantification of Brucella DNA. Superparamagnetic nanoparticles were used as magnetically measured markers to selectively detect the target DNA hybridized with its complementary cap-ture probes immobilized on a porous polyethylene filter. Experimental conditions like density and length of the probes, hybridization time and temperature, and magnetic binding specificity, sensitivity, and detection limit were investigated and optimized. Our sensor demonstrated a relatively fast detection time of approximately 10 min, with a detection limit of 55 copies (0.09 fM) when tested using DNA amplified from Brucella genetic material. In addition, the detection specificity was examined using gDNA from Brucella and other zoonotic bacteria that may coexist in the same niche, confirming the method’s selectivity for Brucella DNA. Our proposed biosensor has the potential to be used for the early detection of Brucella bacteria in the field and can con-tribute to disease control measures.
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700 1 _ |a Ashhab, Yaqoub
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700 1 _ |a Offenhäusser, Andreas
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700 1 _ |a Krause, Hans-Joachim
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773 _ _ |a 10.3390/ijms242417272
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