Kevin Keener, Purdue University (IMAGE) Purdue University Caption Kevin Keener's research has shown that cooling eggs after they are laid may increase the natural defenses those eggs have against bacteria such as Salmonella. Credit Purdue Agricultural Communication file photo/Tom Campbell 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.