Nodular gill disease in farmed rainbow trout ( Oncorhynchus mykiss) in Italy.

The article provides an analysis of nodular gill disease in farmed rainbow trout in Italy. Topics discussed include identifying the aetiology of the disease, subjecting gills to parasitological examination by light microscopic observation, and use of nuclear pleomorphism to characterize epithelial cells. The article discusses nodular gill disease of rainbow trout as a serious emerging problem in Italy.