Living <i>Listeria</i> (IMAGE) University of Veterinary Medicine -- Vienna Caption Listeria (stained green) can acquire resistance through the transfer of foreign genes. The green bacteria are alive, red ones are dead. Credit Monika Dzieciol / Vetmeduni Vienna 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.