Marsh rice rat sampling (IMAGE) Ecological Society of America Caption An adult marsh rice rat is measured in the field by Louisiana State University Ph.D. student, Anna Pérez-Umphrey, prior to having a blood sample collected. Blood and tissue samples were screened to determine each individual's infection status for Bayou virus (Bayou orthohantavirus), a pathogenic hantavirus that can cause Hantavirus Cardiopulmonary Syndrome in humans. [photo taken in 2017]. Credit Tyler Williams Usage Restrictions Credit the Ecological Society of America and Tyler Williams 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.