Listeria (IMAGE) University of Veterinary Medicine -- Vienna Caption A newly defined 'stress survival islet' assures survival of some listeria strains despite high hygiene standards in food production. Credit Institute of Milk Hygiene 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.