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Medical Definition of Feline leukaemia
1. A leukaemic disorder of cats caused by feline leukaemia virus, a member of the family Retroviridae, and characterised by depression and mild fever, and by the presence of tumours in the mediastinal and mesenteric lymph nodes, followed by multiple tumour formation throughout the body; during the terminal stages of the disease lymphoblasts may appear in the peripheral blood. (05 Mar 2000)