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2005, Number 4

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Rev Inst Nal Enf Resp Mex 2005; 18 (4)

A positive sputum smear test is not always indicative of pulmonary TB. Another reason to order routine cultures

Laniado-Laborín R, Cabrales-Vargas N

Language: Spanish
References: 13
Page: 286-299
PDF size: 54.64 Kb.


ABSTRACT

The Ziehl–Neelsen (ZN) stain is rapid and economic technique for the identification of acid-fast organisms, primarily Mycobacterium tuberculosis. However, the presence of acid-fast bacilli can not be considered as proof of tuberculosis; there is a wide variety of acid-fast microorganisms including non-tuberculous mycobacteria and even Nocardia spp and this could be a cause of misidentification. To illustrate this point, we present a patient with pulmonary nocardiosis and another with non-tuberculous mycobacteriosis that were initially misdiagnosed and treated for tuberculosis.


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