BioFilms (IMAGE) West Virginia University Caption Emily Garner, assistant professor of civil and environmental engineering at West Virginia University, shows students how to prepare water samples for analysis. The samples consist of DNA extracted from microorganisms found in drinking water distribution system samples collected. In the background is recent University graduate Madison Haddix. Credit WVU Photo Usage Restrictions NONE 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.