Comparison of the Efficacy of Filgrastim and an Inactivated Parapoxvirus ovis Paraimmune Activator in Naturally Infected Cats with Feline Panleukopenia

= 0.615), although the high-dose filgrastim group showed the lowest mortality (42.9%). These findings suggest that high-dose filgrastim may contribute to cytopenias and promote hematological recovery in FPL, while iPPVO may serve as a supportive immunomodulatory therapy. However, it should be noted that the efficacy of filgrastim and/or iPPVO treatments has not been definitively confirmed, likely due to the small sample size and the lack of well-controlled randomized studies.