An automated bacterial concentration and recovery system for pre-enrichment required in rapid Escherichia coli detection

Sci Rep. 2018 Dec 13;8(1):17808. doi: 10.1038/s41598-018-35970-8.

Abstract

One of the biggest challenges in rapid low concentration bacterial detection is the pre-concentration or pre-enrichment, which aims to increase bacteria concentration and reduce sample volume for easy bacterial detection. In practical bacterial detection, large-volume water samples with a pathogenic bacterial concentration of less than 1 CFU/mL have to be tested rapidly. The reported biosensors either have insufficient detection limit or have limited capability of handling a sufficiently large water sample. Therefore, a high-performance automated pre-enrichment process is strongly demanded in rapid practical bacterial detection. In this paper, a practical high performance automated bacterial concentration and recovery system (ABCRS) based on the combination of a ceramic membrane and tangential flow filtration technique was presented with short processing time (less than one hour), low pre-enrichment limit (≤0.005 CFU/mL), high concentration ratio (≥ 500), high recovery efficiency (~ 90%), and small final retentate volume (≤ 5 mL).

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Biosensing Techniques* / instrumentation
  • Biosensing Techniques* / methods
  • Escherichia coli* / classification
  • Escherichia coli* / isolation & purification
  • Membranes, Artificial*

Substances

  • Membranes, Artificial