Mature bacterial biofilm (IMAGE) University of Montreal Caption A mature bacterial film (biofilm) of Caulobacter cells attached to a glass surface. Credit Cécile Berne, Université de Montréal Usage Restrictions Use with this research. License Original 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.