Patrik Ellström (IMAGE) Uppsala University Caption Patrik Ellström, researcher at Zoonosis Science Center (ZSC), Department of Medical Biochemistry and Microbiology, Uppsala University and microbiologist at Uppsala University Hospital Credit Patrik Ellström/private Usage Restrictions Credit must be given to the creator. License CC BY 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.