Abstract
Virus isolation was performed from faeces of one cat with symptoms of panleukopaenia and from autopsy material from six out of seven cats with macroscopical lesions of panleukopaenia. In a few cases a cytopathic effect was observed in feline kidney cell cultures. The virus produced intranuclear inclusion bodies. The inclusion bodies were detectable in stained preparations. Both the cytopathic effect and the intranuclear inclusion bodies occurred irregulary and was of a transient nature. Inoculation experiments were made on cats using culture material. Fulminating symptoms of panleukopaenia developed in five out of eight kittens after intraperitoneal inoculation.

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