Photo of Downing Lake, Ind. (IMAGE) U.S. National Science Foundation Caption Downing Lake, Ind., is one of seven lakes studied in the infectious disease research. Credit David Civitello 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.