Fidaxomicin selectively targets C. diff (IMAGE) Rockefeller University Caption The researchers demonstrated at a molecular level how fidaxomicin selectively targets C. diff while sparing the innocent bacterial bystanders. Credit The Rockefeller University Usage Restrictions Image may be used to illustrate research described in the accompanying 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.