Mosquito-Borne Virus Mimics Rheumatoid Arthritis (IMAGE) Washington University School of Medicine Caption A virus spread by the Aedes aegypti mosquito can cause symptoms very similar to rheumatoid arthritis, researchers at Washington University School of Medicine in St. Louis have shown. Credit James Gathany/CDC Usage Restrictions Please credit James Gathany of the CDC if you use image. 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.