Atlantic salmon with piscirickettsiosis and typical skin lesions.
Photo: Hamish Rodger
Piscirickettsiosis (SRS) in the north-east Atlantic area
SRS is a serious problem for the Chilean salmon farming industry. In recent years, the disease has become increasingly significant in Ireland and Scotland and has also appeared at several Norwegian farms. Researchers do not yet know why SRS is on the rise in the Northeast Atlantic. To increase knowledge of the disease, the two-year, FHF-funded PisciNOR research project was established. This article presents some of the preliminary results.
By: Hamish Rodger1, Anne Berit Olsen2, Meritxell Díez-Padrisa1, Ana Herrero1, Samantha White3, Silvia Soares3, Patricio Bustos4, Marcos Mancilla4 and Duncan J. Colquhoun2
1 PatoGen Fish Health Services Ltd., Ireland
2 Norwegian Veterinary Institute, Norway
3 Marine Institute, Ireland
4 ADL Diagnostic Chile, Chile
Primarily infecting salmonid species, piscirickettsiosis or SRS (salmon rickettsial syndrome/septicaemia) is caused by the bacterium Piscirickettsia salmonis, although as we are now becoming increasingly aware, other closely related bacterial species may also be involved. Piscirickettsiosis has also occasionally been reported in other farmed marine fish species including lumpfish, sea bass and turbot. While SRS has been identified in most salmon-producing countries, the severity of infection experienced varies significantly across different geographical regions. It is considered the most important infectious disease in salmon farming in Chile, but its clinical significance has traditionally been lower in the Northern Hemisphere. It is, however, now considered a major threat to Irish salmon farming and, to a lesser but increasing extent, to Scottish salmon farming.
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