Publication - Factsheet

Diseases of wild and farmed Finfish

Published: 17 Dec 2019

Some fish and shellfish diseases of particular significance in Scotland.

Diseases of wild and farmed Finfish
Amoebic gill disease (AGD)

Amoebic gill disease (Neoparamoeba Perurans) is caused by the protozoan parasite Neoparamoeba perurans. It is a problem for salmonid aquaculture, resulting in severe economic losses in Tasmania and Australia and recently causing problems for the Scottish salmon industry. The parasites causes proliferative gill disease.

Clinical signs include increased mucus on the gills with white multifocal patches of swollen tissue. Fish may swim close to the surface and breathe rapidly.

The diagnostic methods include:

  • Histopathology
  • Real-Time PCR and Sequencing