Feline panleukopenia is a highly contagious, potentially fatal viral disease that is almost entirely preventable through vaccination.
Panleukopenia causes severe gastroenteritis including vomiting, bloody diarrhoea, and dehydration, with progression to bone marrow suppression and collapse. Death occurs rapidly in severe cases, while survivors may experience weeks of intensive supportive care. The welfare cost to individual cats is immense, and the disease is almost entirely preventable through a simple vaccination course beginning at 8-9 weeks. Unvaccinated populations in shelters and outdoor cat communities provide reservoirs for spread. Neonatal infection causing cerebellar hypoplasia results in a lifetime of neurological impairment including tremors and incoordination, though affected cats can have good quality of life with appropriate care.