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Feline Leukaemia Virus (FeLV)
Infectious DiseaseVirusFelineNew
Key Points
  • FeLV is an oncogenic retrovirus of cats that causes immunosuppression, bone marrow disease and neoplasia (most commonly lymphoma and leukaemia)
  • The primary route of transmission is via contact with saliva, respiratory secretions and nasal secretions
    • Higher risk in high-density environments
  • The outcome of infection depends on the host’s immune response and can be either abortive, regressive or progressive
  • Diagnosis relies on detection of the FeLV p27 antigen alongside PCR
  • There is no cure for FeLV so treatment is supportive and addresses secondary disease
  • Strict biosecurity and vaccination are key for prevention
Differential Diagnoses
  1. Feline Immunodeficiency Virus (FIV)
  2. Primary lymphoma
  3. Feline haemoplasmosis
Overview
Aetiology
Clinical Signs
Diagnosis
Treatment
Prevention
Resources
Overview

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Aetiology

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Clinical Signs

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Diagnosis

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Treatment

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Prevention

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Resources

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Educational content only. This factsheet is for general veterinary education and is not a substitute for professional veterinary advice, diagnosis, or treatment. Not for use in an emergency — contact a veterinarian or emergency service. Full disclaimer →