Bacteroides Treated with Antibiotic (IMAGE) Norwich BioScience Institutes Caption Bacteroides bacteria survive treatment with antibiotic, but adopt a filamentous morphology. Credit Louise Salt and Kathryn Cross, IFR 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.