This is a report concluding the authors' surveys of the findings of invasive and infective causal agents of diseases, as well as cases of non-infectious diseases, in salmonids, as recorded periodically over a seven-year period at the main hatcheries of the Czech Fishers' Union in the North Moravian region. Considering the results obtained so far, the most frequent parasites of Hucho hucho, Parasalmo gairdneri , Salmo trutta m. fario, Salvelinus fontialis and Thymallus thymallus are Trichodina sp, Ichthyophthirius multifiliis, Chilodonella cyprini, Apiosoma piscicola, Hexamita salmonis, Gyrodactylus salaris and Diplostomum spathaceum. As to the etiological causative agents of fungus diseases, Saprolegnia sp was diagnosed most frequently. VHS and UDN were the most frequent viruses, and furunculosis, ulcer disease of grayling and bacterial nephritis were the most frequent bacterial diseases. As to the other diseases, the following were most frequently diagnosed: alimentary and environmental intoxications, hypovitaminoses, fin rot, rotting of the caudal peduncle, protein deficit, fatty degeneration and infiltration of the liver from bad quality replacer feed mixtures.