Farm field runoff sampling (IMAGE) Purdue University Caption Food science student researchers Hannah Conlkin (left) and Grace Alleman take water samples from the nearby Wea Creek to check for Salmonella in runoff from nearby farm fields. Credit S. Monroe Usage Restrictions News organizations may use this image in reports about the work of Purdue University's Amanda Deering and her collaborators. License Original 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.