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:'''Time scale''' - Acute or Chronic
:'''Time scale''' - Acute or Chronic
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'''Prevalence'''
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Order of '''prevalence''' in UK is cats, dogs, cattle, pigs and sheep. In the cat and ox, viral agents have been identified as the causal agents.
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Order of prevalence in UK: cats, dogs, cattle, pigs and sheep. In the cat and ox, viral agents have been identified as the causal agents.
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* FeLV is an important cause of lymphoma in the cat.
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** 70% of cats with lymphoma will test positive for FeLV.
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** FeLV also causes a number of non-neoplastic diseases.
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*** Anaemia.
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*** Leukopaenia.
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*** Thymic atrophy.
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* Cattle suffer both lymphosarcoma and leukosis in a variety of cytological forms.
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** Bovine lymphoma is caused by [[Bovine Leukaemia Virus]] (BLV).
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*** A retrovirus.
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*** There is a juvenile form of bovine lymphoma seen in young cattle which is not associated with BLV.
===Dog===
===Dog===