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Article
January 2, 1943

PNEUMONIA CAUSED BY MICROCOCCUS TETRAGENUS

Author Affiliations

Chicago

From the Department of Northwestern University Medical School. The case reported here was referred to the author by Dr. Stanislaus Novak.

JAMA. 1943;121(1):41. doi:10.1001/jama.1943.62840010004009a
Abstract

The organism Micrococcus tetragenus was first described by Koch1 and Gaffky2 in 1881. It is commonly found in long standing pyogenic processes in association with a variety of other organisms and in this connection is thought to be a secondary invader and a saprophyte. It has also been reported frequently as a primary cause of infection in various parts of the body, such as meningitis, otitis media, postpartum infections, acute endocarditis, septicemia and arthritis. A search of the literature, however, failed to find this organism attributed to the cause of pneumonia except in 3 instances, all of which were reported in foreign literature. The following is a brief summary of these cases:

Delearde3 in 1897 reported in detail a case of bronchopneumonia due to M. tetragenus in a man aged 49. He recovered the organism in great abundance in practically pure culture. He made note that the

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