Subclinical herpesvirus infection in farmed turbot Scophthalmus maximus.

Subclinical infections with a herpesvirus were detected by light and electron microscopic examination of juvenile turbot collected during a national surveillance programme. Virions detected in the epidermis of skin and in the epithelium of gills had a morphology consistent with those of Herpesvirus scophthalmi described from turbot in the United Kingdom and Denmark. This is the first report of herpesvirus infection in turbot in Norway.