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Eugen Gheorghiu. Detection of pathogenic bacteria by magneto-immunoassays: a review[J]. The Journal of Biomedical Research. doi: 10.7555/JBR.34.20200123
Citation: Eugen Gheorghiu. Detection of pathogenic bacteria by magneto-immunoassays: a review[J]. The Journal of Biomedical Research. doi: 10.7555/JBR.34.20200123

Detection of pathogenic bacteria by magneto-immunoassays: a review

doi: 10.7555/JBR.34.20200123
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  • Corresponding author: Eugen Gheorghiu, International Centre of Biodynamics, 1B Intrarea Portocalelor, Bucharest 060101, Romania. Tel/Fax: +40-213104354/+40-213104361, E-mail: egheorghiu@biodyn.ro
  • Received: 2020-07-27
  • Revised: 2020-10-08
  • Accepted: 2020-11-06
  • Published: 2020-12-25
  • Magnetic particle-based immunoassays are widely used in microbiology-related assays for both microbial capture, separation, analysis, and detection. Besides facilitating sample operation, the implementation of micro-to-nanometer scale magnetic beads as a solid support potentially shortens the incubation time (for magnetic immuno capture) from several hours to less than an hour. Analytical technologies based on magnetic beads offer a rapid, effective and inexpensive way to separate and concentrate the target analytes prior to detection. Magneto-immuno separation uses magnetic particles coated with specific antibodies to capture target microorganisms, bear the corresponding antigens, and subsequently separate them from the sample matrix in a magnetic field. The method has been proven effective in separating various types of pathogenic bacteria from environmental water samples and in eliminating background interferences. Magnetic particles are often used to capture target cells (pathogenic bacteria) from samples. In most commercially available assays, the actual identification and quantitation of the captured cells is then performed by classical microbiological assays. This review highlights the most sensitive analytic methods (i.e., long-range surface plasmon resonance and electrochemical impedance spectroscopy) to detect magnetically tagged bacteria in conjunction with magnetic actuation.


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