biofilms (IMAGE) Penn State Caption The researchers tested the biofilm-forming ability of assemblages comprising the foodborne pathogens Listeria monocytogenes and environmental microbiota. Credit Penn State Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND 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.