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Testing (TB)

Labs Must Reduce False-Positive Cultures

Published in TB and Outbreaks Week, February 10th, 1997

Mycobacteriology laboratories must make greater efforts to minimize false-positive Mycobacterium tuberculosis cultures, say Denver, Colorado, public health officials.

"Clinicians must be aware that false-positive cultures for M. tuberculosis are not rare," researcher William J. Burman and colleagues wrote ("The Incidence of False-Positive Cultures for Mycobacterium tuberculosis," American Journal of Critical Care Medicine, January 1997;155:321-326).

"A clinical axiom is that M. tuberculosis is one of the few organisms whose presence in culture is always indicative of infection. Although it is true that M....

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