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Table 1 Outcome of FeLV infection in the two FeLV-exposed blood donors and the ten exposed recipient cats

From: Retroviral DNA—the silent winner: blood transfusion containing latent feline leukemia provirus causes infection and disease in naïve recipient cats

  Group Cat Outcome of FeLV exposure Health status long-term follow-upa
Blood donors A DP Regressive infection, provirus-positive Healthy
  B DR Regressive infection, viral plasma RNA- and provirus-positive Week 60: reactivation of infection, multicentric T-cell lymphomab
Recipients A P1 Progressive infection, persistently p27-positive Week 31: non-regenerative anemia (FeLV-C)b
   P2 Progressive infection, persistently p27-positive Week 84: multicentric T-cell lymphomab,c
   P3 Regressive infection, provirus-positive Week 94: feline lower urinary tract disease (FLUTD)
   P4 Regressive infection, provirus-positive Healthy
   P5 Regressive infection, provirus-positive Week 133: reactivation of infection, multicentric T-cell lymphomab
  B R1 Regressive infection, provirus-positive Week 26: reactivation of infection, multicentric T-cell lymphoma with secondary lymphoblastic leukemiab
   R2 Regressive infection, provirus-positive Healthy
   R3 Regressive infection, provirus-positive Healthy
   R4 Regressive infection, provirus-positive Week 28: multicentric T-cell lymphoma; no reactivation of the infection (p27-negative)b
   R5 Regressive infection, provirus-positive Healthy
  1. euthanized/died
  2. aStatus observed until 149 weeks post transfusion
  3. bEuthanized for humane reasons
  4. cDuring follow-up study, without re-exposure to FeLV [35]