J.P3 Application of immunostimulants in diet for modulation of the nonspecific defence mechanisms and ASC in rainbow trout: Andrzej K. Siwicki1, Douglas P. Anderson2, Garry L. Rumsay3 1Inland Fisheries Institute, Fish Pathology and Immunology Research Laboratory, Zabieniec, 05-500 Piaseczno, Poland, 2U.S. Fish and Wildlife Service, National Fish Health Research Laboratory, Box 700, Leetown, Kearneysville, WV 25430, USA, and 3U.S. Fish and Wildlife Service, Tunison Laboratory of Fish Nutrition, 3075 Carcie Road, Cortland, NY 13045, USA