USF CDC infection control study image 1 (IMAGE) University of South Florida Caption University of South Florida student Logan Sharp swabs the most commonly touched areas inside an ambulance, including the pulse oximeter, to check for bacteria such as E. coli and staph. Credit USF Usage Restrictions NA 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.