PEDIATRICS Vol. 26 No. 4 October 1960, pp. 563-565
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UNCLASSIFIED MYCOBACTERIA

Saul Blatman M.D.1 and Gardner Middlebrook M.D.1

1 National Jewish Hospital at Denver, and the University of Colorado School of Medicine, 3800 East Colfax Ave. Denver 6, Colo.

The importance of the "Unclassified Mycobacteria" as agents of human disease is becoming increasingly evident.1 Those who have previously considered many strains of Mycobacteria to be nonpathogenic are now investigating their role in cervical adenitis, in pulmonary disease resembling tuberculosis, and as the etiologic agents in certain types of skin granulomata. In pediatrics the problem of cervical adenitis has been a particularly difficult one, and perhaps some of the perplexities of "tuberculous adenitis" can now be solved.2-4

Some investigators chose to label this group of acid-fast organisms as the "Atypical Mycobacteria"; Middlebrook and his coworkers use the term "Unclassified Mycobacteria," because as Mycobacteria they are not atypical; they are simply as yet poorly studied and unclassified.