Biofilm Lung Infection (image) University of Washington Caption Bacterial clusters living in the lungs of a cystic fibrosis patient are highly resistant to killing by antibiotics. Credit Singh lab Usage Restrictions For use by news media, educational institutions, and museums only. 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.