Disease known as feline infectious enteritis and feline panleucopenia. Often fatal. Most common in kittens but cats of all ages susceptible. Fever, severe enteritis often bloody, dehydration, leucopenia, anaemia. Cerebellar hypoplasia in kittens < 2 weeks.

Oral infection followed by initial replication in pharyngeal lymphoid tissue and viraemia, then virus targets rapidly dividing cells in lymph nodes, bone marrow and crypts of small intestine.