The sequential pathology of pancreas disease in Atlantic salmon farms in Ireland

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Abstract
A description is given of cardiac and skeletal myopathy in Atlantic salmon, Sahno salar L., during pancreas disease. Post‐smous in two farms were sampled weekly from April to Oetober. Panereas disease was diagnosed at 9 and 13 weeks after sea transfer on the two farms, respeetively. Myodegenerative lesions were observed in the hearts of fish with hoth normal and diseased panereas. The prevalenee of heart lesions was highest amongst fish affeetcd with panereas disease. Skeletal myopathy of red fibres was observed only in fish in the recovery and chronic phases of disease, whereas white fibre changes were observed in fish with normal pancreas and fish affeetcd with panereas disease.