Catherine Armbruster, Ph.D., M.P.H. (IMAGE) University of Pittsburgh Caption Lead author Catherine Armbruster, Ph.D., M.P.H., is holding a community of biofilm-forming microbes from a pond in Atlanta. Biofilms are common in nature – Armbruster’s study examined bacterial biofilm communities in the sinuses of people with cystic fibrosis Credit Catherine Armbruster Usage Restrictions For use with this embargoed release 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.