Abstract
THERE is evidence from electron microscopic and transmission studies that a leukaemia-type virus is associated with, and is probably the cause of, lymphosarcoma (leukaemia) in the cat. Thus virus particles are found in the tissues of a proportion of spontaneous cases1–4. The disease can be transmitted using cell free extracts of tumours3–6, and virus is present in the experimentally induced cases3,4,6–8. These virus particles are identical in morphology and apparent mode of production to the avian and murine leukaemia viruses.
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