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Improved Fluoroquinolone-Resistant and Extensively Drug-Resistant Tuberculosis Treatment Outcomes

 Eun Hye Lee  ;  Seung Hyun Yong  ;  Ah Young Leem  ;  Sang Hoon Lee  ;  Song Yee Kim  ;  Kyung Soo Chung  ;  Ji Ye Jung  ;  Moo Suk Park  ;  Young Sam Kim  ;  Joon Chang  ;  Young Ae Kang 
 OPEN FORUM INFECTIOUS DISEASES, Vol.6(4) : ofz118, 2019 
Journal Title
Issue Date
MDR TB ; XDR TB ; fluoroquinolone resistance ; treatment outcomes
Background: Treatment outcomes of multidrug-resistant tuberculosis (MDR TB) remain poor, particularly for fluoroquinolone-resistant (FQ-R) MDR TB. The aim of this study was to determine treatment outcomes and factors associated with failure of MDR TB treatment, focusing on FQ resistance.

Methods: Medical records were retrospectively reviewed of patients diagnosed and treated for MDR TB from January 2005 through December 2017 at Severance Hospital, South Korea.

Results: Of a total of 129 patients with MDR TB, 90 (69.8%) cases were FQ-sensitive (FQ-S) and 39 (30.2%) were FQ-R. FQ-R MDR TB was associated with more severe clinical symptoms, including cavitary lesions and bilateral disease, and tended to require treatment with a greater number of drugs for a longer period of time than FQ-S MDR TB. Linezolid (51.3% vs 7.8%, P < .001), bedaquiline (20.5% vs 8.9%, P = .083), and delamanid (10.3% vs 5.6%, P = .452) were more frequently used in FQ-R cases. Overall, 95/124 patients (76.6%) had favorable treatment outcomes, and we did not detect a significant difference between FQ-R and FQ-S (FQ-S 65/87, 74.7%, vs FQ-R 30/37, 81.1%; P = .443). Old age, low body mass index, smoking, and malignancy-but not FQ resistance or extensively drug-resistant (XDR) TB-were associated with poor clinical outcomes.

Conclusions: Overall, 76.6% of MDR TB patients had successful treatment outcomes. Effective drug combinations and appropriate use of new drugs may improve treatment outcomes of FQ-R MDR and XDR TB. Poor clinical outcomes were more related to the patients' general condition rather than FQ resistance or XDR.
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1. College of Medicine (의과대학) > Dept. of Internal Medicine (내과학교실) > 1. Journal Papers
Yonsei Authors
Kang, Young Ae(강영애) ORCID logo https://orcid.org/0000-0002-7783-5271
Kim, Song Yee(김송이) ORCID logo https://orcid.org/0000-0001-8627-486X
Kim, Young Sam(김영삼) ORCID logo https://orcid.org/0000-0001-9656-8482
Park, Moo Suk(박무석) ORCID logo https://orcid.org/0000-0003-0820-7615
Lee, Sang Hoon(이상훈) ORCID logo https://orcid.org/0000-0002-7706-5318
Lee, Eun Hye(이은혜) ORCID logo https://orcid.org/0000-0003-2570-3442
Leem, Ah Young(임아영) ORCID logo https://orcid.org/0000-0001-5165-3704
Chang, Joon(장준) ORCID logo https://orcid.org/0000-0003-4542-6841
Jung, Kyung Soo(정경수) ORCID logo https://orcid.org/0000-0003-1604-8730
Jung, Ji Ye(정지예) ORCID logo https://orcid.org/0000-0003-1589-4142
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