Centrifugal sedimentation immunoassays for multiplexed detection of enteric bacteria in ground water

Julia Litvinov, Scott T. Moen, Chung Yan Koh, Anup K. Singh

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


Waterborne pathogens pose significant threat to the global population and early detection plays an important role both in making drinking water safe, as well as in diagnostics and treatment of water-borne diseases. We present an innovative centrifugal sedimentation immunoassay platform for detection of bacterial pathogens in water. Our approach is based on binding of pathogens to antibody-functionalized capture particles followed by sedimentation of the particles through a density-media in a microfluidic disk. Beads at the distal end of the disk are imaged to quantify the fluorescence and determine the bacterial concentration. Our platform is fast (20 min), can detect as few as ~10 bacteria with minimal sample preparation, and can detect multiple pathogens simultaneously. The platform was used to detect a panel of enteric bacteria (Escherichia coli, Salmonella typhimurium, Shigella, Listeria, and Campylobacter) spiked in tap and ground water samples.

Original languageEnglish (US)
Article number014103
Issue number1
StatePublished - Jan 1 2016
Externally publishedYes

ASJC Scopus subject areas

  • Biomedical Engineering
  • General Materials Science
  • Condensed Matter Physics
  • Fluid Flow and Transfer Processes
  • Colloid and Surface Chemistry


Dive into the research topics of 'Centrifugal sedimentation immunoassays for multiplexed detection of enteric bacteria in ground water'. Together they form a unique fingerprint.

Cite this