Volume 20, Issue 1 pp. 80-86
Original Article

Nontuberculous mycobacteria in diffuse panbronchiolitis

Takahiro Tsuji

Corresponding Author

Takahiro Tsuji

Department of Respiratory Medicine, Tenri Hospital, Nara, Japan

Correspondence: Takahiro Tsuji, Department of Respiratory Medicine, Tenri Hospital, 200 Mishima-cho, Tenri City, Nara 632-8552, Japan. Email: [email protected]Search for more papers by this author
Eisaku Tanaka

Eisaku Tanaka

Department of Respiratory Medicine, Tenri Hospital, Nara, Japan

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Ikkoh Yasuda

Ikkoh Yasuda

Department of Respiratory Medicine, Tenri Hospital, Nara, Japan

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Yoshinari Nakatsuka

Yoshinari Nakatsuka

Department of Respiratory Medicine, Tenri Hospital, Nara, Japan

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Yusuke Kaji

Yusuke Kaji

Department of Respiratory Medicine, Tenri Hospital, Nara, Japan

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Takehiro Yasuda

Takehiro Yasuda

Department of Respiratory Medicine, Tenri Hospital, Nara, Japan

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Seishu Hashimoto

Seishu Hashimoto

Department of Respiratory Medicine, Tenri Hospital, Nara, Japan

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Moon Hee Hwang

Moon Hee Hwang

Department of Respiratory Medicine, Tenri Hospital, Nara, Japan

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Takashi Hajiro

Takashi Hajiro

Department of Respiratory Medicine, Tenri Hospital, Nara, Japan

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Yoshio Taguchi

Yoshio Taguchi

Department of Respiratory Medicine, Tenri Hospital, Nara, Japan

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First published: 30 September 2014
Citations: 9

Abstract

Background and objective

Nontuberculous mycobacterial (NTM) lung disease secondary to cystic fibrosis (CF) has been reported, but there is limited data about NTM prevalence in non-CF bronchiectasis. We retrospectively investigated the prevalence of NTM associated with diffuse panbronchiolitis (DPB), a disorder also characterized by reduced mucociliary clearance with bronchiectasis.

Methods

We reviewed mycobacterial cultures, patient characteristics and computed tomography findings of 33 patients with DPB between January 2000 and December 2012. Prevalence was based on at least one positive NTM culture.

Results

Mean patient age was 51.5 years. During a mean 162.8-month follow-up, the prevalence of NTM in sputum was 21.2% (seven patients). Of the seven positive patients, six had Mycobacterium avium complex, one had M. kansasii and M. chelonae co-cultured with M. avium complex. Three patients were positive twice, and two had positive smears. The mean time from DPB diagnosis to the first positive result was 194.6 months. NTM-positive patients tended to have lower forced expiratory volume in 1 s (% predicted) than NTM-negative patients (50.0% vs 77.3%, P = 0.03), but there were no radiological or clinical differences between the two groups.

Conclusions

Our observations suggest that NTM is found more often in DPB. Defects of mucociliary clearance may predispose individuals to NTM infection.

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