TWENTY-FIFTH ANNUAL EASTERN FISH HEALTH WORKSHOP MARCH 10-13, 2000   A Reinvestigation Of A Largemouth Bass (Micropterus salmoides) Viral Infection From A Previous Fishkill In The Susquehanna River in Maryland     Laurence Pieper1, Craig Weedon1, Julie Thompson2, and Eric May3   1Maryland Department of Natural Resources, Fisheries Service 301 Marine Academy Dr. Stevensville, MD 21666;  2U.S. Fish and Wildlife, Admiral Cochrane Dr., Annapolis, MD 21401; 3University of Maryland Eastern Shore, Princess Anne, MD     Erythrocytic inclusion body syndrome (EIBS) is a condition found to affect a variety of fish worldwide. In January 1992 largemouth bass resident to the Conowingo Pool, formed by the Conowingo Dam on the Susquehanna River, were found dead and dying in the tributaries of the Pool. The mortalities and morbidities (most of which resulted in death) affected nearly 1500 largemouth bass. Biologists from the Maryland Departments of the Environment and Natural Resources investigated the fish kill and during the course of that investigation found evidence for the presence of  EIBS like viral structures in the cytoplasm of red blood cells. A follow up investigation was performed in 1997 to determine if the disease was still present in the population. A total of 10 fish were taken for necropsy, five from each of two sites along the Susquehanna River, and an additional fifteen from the two sites for blood gas analysis. The results would have significant implications for stock restoration using imported eggs and/or larvae which are infected with a viral agent.   Return to 25th Annual Eastern Fish Health Workshop Return to Leetown Science Center Home Page