Trichodina as a cause of mortalities in cage reared rainbow trout (Salmo gairdneri) and salmon (Salmo salar)
Bulletin of the European Association of Fish Pathologists 4(1): 3-5
Varying losses attributed to Trichodina occurred at sea cage sites in Ireland in 1982 and 1983. Losses occurred suddenly in July, being more marked in rainbow trout than in salmon. Histopathological changes in the gills are described. In the 1982 case, only 1+ rainbow trout and maturing salmon were severely affected, while salmon smolts in adjacent cages experienced no significant mortalities. In 1983 there was usually a concurrent severe infection with Icthyobodo.