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WILLIAM M. LEES, MD; ROBERT T. FOX, MD; THOMAS W. SHIELDS, MD

AMA Arch Surg. 1965;91(1):67-70.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

FOR many years bacteriologists in culturing sputum specimens for mycobacteria occasionally noticed colonies of organisms differing somewhat from the typical Koch bacillus. In the past ten years these variants have appeared much more frequently, and it has been recognized that these are not atypical tubercle bacilli or mutants, but are truly different species of mycobacteria. Some are discovered fortuitously in the absence of any demonstrable pulmonary disease and are probably nonpathogenic. Other species are definitely pathogenic to man and cause disease which is essentially indistinguishable from the pulmonary infection produced by mycobacteria tuberculosis.

Various classifications have been suggested, but that proposed by Runyon⁷ has achieved the most universal acceptance. This classification is based on gross cultural characteristics, but certain chemical and physical reactions serve to differentiate them more accurately. The Subcommittee on Unclassified Mycobacteria⁹ prefer the term "unclassified," yet by common usage the term "atypical" is recognized as . . . [Full Text PDF of this Article]

Author Affiliations
CHICAGO

From the City of Chicago Municipal Tuberculosis Sanitarium. Chief of Surgery, Municipal Tuberculosis Sanitarium and Clinical Associate Professor of Surgery, Stritch School of Medicine of Loyola University (Dr. Lees); Assistant Chief of Surgery, Municipal Tuberculosis Sanitarium and Assistant Professor of Surgery, Northwestern University School of Medicine (Dr. Fox); Consultant in Surgery, Municipal Tuberculosis Sanitarium and Associate Professor of Surgery, Northwestern University School of Medicine (Dr. Shields).

Footnotes
Submitted for publication March 13, 1965.

Reprint requests to Chicago Tuberculosis Sanitarium, Chicago Illinois, 60646 (Dr. Lees).

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