Related Experiment Video
Updated: Jan 23, 2026

Detection of Live Escherichia coli O157:H7 Cells by PMA-qPCR
Published on: February 1, 2014
24-Hour Presumptive Enumeration of Escherichia coli O157:H7 in Foods by Using the ISO-GRID® Method with SD-39 Agar
1QA Life Sciences, Inc., 6645 Nancy Ridge Drive, San Diego, California 92121, USA.
Abstract:
Two 24-hour presumptive enumeration methods for Escherichia coli O157:H7 organisms based on the hydrophobic grid membrane filter (ISO-GRID) and using SD-39 agar, a new selective and differential culture medium, were developed and compared to a 3-tube MPN (most probable number) method using modified tryptone soy broth enrichment. The comparative study comprised 22 combinations of storage conditions and food products, including a variety of raw and cooked meats and several dairy products. The ISO-GRID direct filtration method produced counts which were equivalent to or significantly higher than the 3-tube MPN method for all food-storage combinations except for frozen pasteurized whole egg. The ISO-GRID resuscitation method produced counts equivalent to the 3-tube MPN method for the frozen egg.
More Related Videos
09:04Foodborne Pathogen Screening Using Magneto-fluorescent Nanosensor: Rapid Detection of E. Coli O157:H7
Published on: September 17, 2017
06:20Detection of Enterohemorrhagic Escherichia Coli Colonization in Murine Host by Non-invasive In Vivo Bioluminescence System
Published on: April 9, 2018
Related Concept Videos
Holter Monitor: 24-Hour Monitoring
Regulation of Food Intake
Chemotaxis in E. coli
Microorganisms in Agriculture and Food industry
Stringent Response in E. coli
Pharmacokinetics: Drug–Food and Drug–Viral Interactions