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171
Rutilus rutilus
Roach (inc. hybrids)
Lymphosarcoma
Haemopoietic tissues
Unknown
Unknown
Several fish showed this condition. Similar cases in pike are known to be caused by a virus.
Swollen body cavity especially mid-body and mid-spleen. There was little liver or gonad, and an eye fluke present in affected fish. Tissue of origin could not be conclusively discerned.
River
Yorkshire
ENGLAND
Dr. C. Andrews
3/19/1981
