Effects of Watercress (Nasturtium nasturtium) extract on selected immunological parameters of rainbow trout (Oncorhynchus mykiss) Journal title: Open Veterinary Journal Authors: M.S. Asadi| Department of Fishery, Natural Resource Faculty, University of Tehran, Karaj, Iran, A.R.... Subject(s): Biochemistry, Immunology, Microbiology, Parasitology, Veterinary Science, Endocrinology, Pathology and Forensics