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The virus of parrots and parrakeets discovered by Pacheco, Bier, and Meyer is unrelated to the agent causing psittacosis either in birds or in man. The virus is fairly species-specific and manifests itself chiefly by the production of areas of focal necrosis in the liver and acidophilic intranuclear inclusions in affected cells.

A VIRUS DISEASE OF PARROTS AND PARRAKEETS DIFFERING FROM PSITTACOSIS