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August 23, 1930


Author Affiliations

From the Hospital of the Rockefeller Institute for Medical Research.

JAMA. 1930;95(8):577-579. doi:10.1001/jama.1930.02720080015006

Within the period of a year approximately 500 cases of psittacosis have been recorded.1 The clinical picture of the disease has been recognized for at least fifty years,2 and many of the recent cases have been carefully described. Furthermore, the literature has been excellently reviewed by a number of workers.3 The reasons for reporting the present case are the facts that (1) daily blood counts were made by means of the supravital method of staining; (2) the changes in the lungs were followed by daily roentgen examinations; (3) electrocardiographic studies were made, and (4) a positive laboratory diagnosis was obtained through the use of white mice.

Work on psittacosis was begun in our laboratory February 26, and has continued for four months. A large number of parrots, mice, guinea-pigs, rabbits and monkeys have been inoculated with the virus, and the course of the infection in these animals

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