Related Experiment Video
Updated: Aug 11, 2026
Detection of Enterohemorrhagic Escherichia Coli Colonization in Murine Host by Non-invasive In Vivo Bioluminescence System
Published on: April 9, 2018
Methods for the isolation of water-borne Escherichia coli O157
J T Lejeune1, T E Besser, D H Rice
1Department of Veterinary Clinical Sciences, Washington State University, Pullman 99164, USA.
Aims:
To develop improved methods for the detection of Escherichia coli O157 from water and sediments.
Methods And Results:
The effects of different broth enrichment media (unsupplemented tryptic soya broth, tryptic soya broth with antibiotics, and gram-negative broth), incubation durations (5 and 24 hrs), incubation temperatures (37 and 44.5 degrees C) and the use of immunomagnetic separation (IMS) on the sensitivity of E. coli O157 detection were evaluated on artificially and naturally-contaminated water and sediment samples. The sensitivity of recovery of E. coli O157 from samples was dependent upon the media composition, temperature duration of incubation and the use of IMS.
Conclusion:
Use of high temperature (44.5 degrees C) incubation for 24 hrs in unsupplemented tryptic soya broth and the use of IMS improved the sensitivity of E. coli O157 culture from water and sediment samples.
Significance And Impact Of The Study:
The methods described can be used to increase the sensitivity of E. coli O157 detection from water and sediments.
More Related Videos
09:56Scalable Isolation and Purification of Extracellular Vesicles from Escherichia coli and Other Bacteria
Published on: October 13, 2021
08:58Isolation and Identification of Waterborne Antibiotic-Resistant Bacteria and Molecular Characterization of their Antibiotic Resistance Genes
Published on: March 3, 2023
