Mouse Foot with Chikungunya Infection (IMAGE) Washington University School of Medicine Caption Cells harboring chikungunya virus (red) are visible in a mouse foot 28 days after infection. The virus is notorious for causing prolonged, painful arthritis that can last for years. Researchers at Washington University School of Medicine in St. Louis have developed a way to fluorescently tag cells infected with chikungunya virus. The technique opens up new avenues to study how the virus persists in the body and potentially could lead to a treatment. Credit Alissa Young and Marissa Locke Usage Restrictions This image is to be used in accordance with the mission, policies and guidelines of Washington University in St. Louis. Visit https://wustl.edu/about/compliance-policies/media-policies/photo-use/ for more information. 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.