The Journal of Experimental Medicine
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The Journal of Experimental Medicine, Vol 79, 65-77, Copyright, 1944, by The Rockefeller Institute for Medical Research New York


ARTICLE

FURTHER LABORATORY STUDIES ON THE CLASSIFICATION OF PSITTACOSIS-LIKE AGENTS

M. Dorthy Beck 1, Monroe D. Eaton M.D.1, and Rosemary O'Donnell 1

1 From the Research Laboratory of the California State Department of Public Health, Berkeley

1. It was demonstrated by pathogenicity and latency tests in mammals and birds that variations exist among a group of viruses, isolated from several sources and producing coccoid elementary bodies resembling those of psittacosis.

2. Active cross immunity tests emphasized these differences and confirmed their significance.

3. On the basis of the present experimental evidence the psittacosis-like viruses causing atypical pneumonia in man may be classified into three groups: psittacosis, ornithosis, and human pneumonitis (strain S-F) of undetermined origin.

Submitted on September 29, 1943


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