C. difficile Growing in Culture (image) University of Michigan Health System Share Print E-Mail Caption C. difficile bacteria fluoresces under UV light. Credit Centers for Disease Control and Prevention Usage Restrictions Credit CDC as source of image. Share Print E-Mail 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.