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Infectious Diseases in Clinical Practice:
doi: 10.1097/IPC.0b013e3182a01f4d
Case Reports

Mycobacterium celatum Misdiagnosed as Mycobacterium tuberculosis: Case Report and Review of Literature

Zainah, Hadeel MD*; Toama, Wael MD*; Samuel, Linoj MD; Alhelo, Sara Chamas MD*; Stephan, Waseem MD*; Tibbetts, Robert J. MD

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Abstract

Mycobacterium celatum has been shown to cause fatal disease in both immunocompetent and immunocompromised patients. The similarity in symptoms and radiological features between M celatum and M tuberculosis makes it difficult to differentiate between the 2 clinically or based on early laboratory testing. Clinical symptoms include cough, malaise, and weight loss associated with cavitary lesions and pulmonary infiltrates, whereas the initial laboratory testing includes positive acid-fast stain. Identification using nucleic acid amplification testing (NAAT) in the diagnostic process is sensitive; however, cross-reactivity between M celatum and M tuberculosis NAAT leading to diagnostic errors and inappropriate treatment has been reported. We report a case of pulmonary disease caused by M celatum misdiagnosed as M tuberculosis based on NAAT.

Copyright © 2013 by Lippincott Williams & Wilkins

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