Clinical and radiological features of Mycobacterium kansasii and other NTM infections

Respiratory Medicine
Alona MatveychukDavid Shitrit

Abstract

Mycobacterium kansasii infection is one of the most common causes of nontuberculous mycobacterial lung disease in the world. However, it is not possible to differentiate completely between M. kansasii and other nontuberculous mycobacteria (NTM) because of a lack of direct comparative studies. This retrospective study sought to identify their clinical and radiological features systematically. The sample included 98 consecutive patients with a culture-positive diagnosis of NTM infection, derived from the databases of the Laboratory of Microbiology of a tertiary medical center and two outpatient tuberculosis centers. Sixty-four patients had M. kansasii infection. All patients fulfilled disease criteria for treatment. Data on patient background and clinical features were collected, and chest radiographs were evaluated. In the M. kansasii group, n = 27 (42%) were native-born Israelis compared to 9.4% (n = 3) of all other NTM groups (p = 0.0001). Similar rates of co-morbid diseases, including diabetes mellitus, heart disease, lung diseases, and malignancy were noted in both groups. Old TB was less common in the M. kansasii group compared to the other NTM (3.1% vs. 23.5%, p = 0.003). Clinical symptoms were significantly more common in...Continue Reading

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