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A microfluidic fluidized bed to capture, amplify and detect bacteria from raw samples

Abstract : Bacterial contamination and subsequent infections are a major threat to human health. An early detection in the food chain, clinics or the environment, is key to limit this threat. We present a new concept to develop low-cost hand-held devices for the ultra-sensitive and specific detection of bacteria in a one-step process of 2–8 h, directly from complex raw samples. This approach is based on a novel microfluidic magnetic fluidized bed. It reaches a 4 CFU (colony forming unit) sensitivity with high quantification accuracy in a large dynamic range of 100–107CFU/mL. The versatility of the approach was demonstrated with the detection of different bacteria strains, among which Salmonella Typhimurium and E. coli O157:H15. Additionally, the method is sensitive to infectious bacteria only, a criterion requested by main applications and currently requiring additional culture steps of one to several days.
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Submitted on : Tuesday, January 14, 2020 - 11:05:30 AM
Last modification on : Tuesday, July 21, 2020 - 3:58:32 AM

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Lucile Alexandre, Iago Pereiro, Amel Bendali, Sanae Tabnaoui, Jana Srbova, et al.. A microfluidic fluidized bed to capture, amplify and detect bacteria from raw samples. Methods in Cell Biology, Elsevier, 2018, Microfluidics in Cell Biology Part B: Microfluidics in Single Cells, 147, pp.59-75. ⟨10.1016/bs.mcb.2018.07.001⟩. ⟨pasteur-02438393⟩

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