Comparison of Device and Agar Gel Test (IMAGE) University of Southampton Caption Images showing the growth of E. coli on a) agar plates and b) filter papers under various dilutions after an overnight (of ~18 h) incubation at 37 degrees Celsius. Credit University of Southampton Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.