Purchase Receipts in Contact with Food (IMAGE) University of Granada Caption The researchers warn that tickets should not get in contact with food -- for example, meat or fish -- while unpacking it in the kitchen. Credit University of Granada 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.