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Determination of Clinical Characteristics of Mycobacterium kansasii-Derived Species by Reanalysis of Isolates Formerly Reported as M. kansasii

Cited 3 time in Web of Science Cited 3 time in Scopus
Authors

Kim, Young-gon; Lee, Hong Yeul; Kwak, Nakwon; Park, Jae Hyeon; Kim, Taek Soo; Kim, Man Jin; Lee, Jee-Soo; Park, Sung-Sup; Yim, Jae-Joon; Seong, Moon-Woo

Issue Date
2021-09
Publisher
대한진단검사의학회
Citation
Annals of Laboratory Medicine, Vol.41 No.5, pp.463-468
Abstract
Background: Seven genotypic subtypes of Mycobacterium kansasii were recently demonstrated to represent distinct species based on phylogenomic analysis. Mycobacterium kansasii sensu stricto (formerly known as subtype 1) is most frequently associated with human diseases; only a few studies have compared the diverse clinical characteristics of M. kansasii subtypes, including their drug susceptibilities. We determined the actual incidence of infections caused by each subtype of M. kansasii and identified their clinical characteristics. Methods: We subtyped isolates identified as M. kansasii over the last 10 years at a tertiary care hospital. Percent identity score of stored sequencing data was calculated using curated reference sequences of all M. kansasii subtypes. Clinical characteristics were compared between those classified as subtype 1 and other subtypes. Student's t-test, Wilcoxon rank-sum test, and Fisher's exact test were used for comparisons. Results: Overall, 21.7% of the isolates were identified as species distinct from M. kansasii. The proportion of patients with subtype 1 M. kansasii infection who received treatment was significantly higher than that of patients with other subtype infections (55.3% vs. 7.7%, P = 0.003). Only patients with subtype 1 infection received surgical treatment. Non-subtype 1 M. kansasii isolates showed a higher frequency of resistance to ciprofloxacin and trimethoprim/sulfamethoxazole. Conclusions: Non-subtype 1 M. kansasii isolates should be separately identified in routine clinical laboratory tests for appropriate treatment selection.
ISSN
2234-3806
URI
https://hdl.handle.net/10371/177969
DOI
https://doi.org/10.3343/alm.2021.41.5.463
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  • College of Medicine
  • Department of Medicine
Research Area Nontuberculous Mycobacteria, Tuberculosis, multidrug-resistant tuberculosis, 결핵, 다제내성결핵, 비결핵항산균 폐질환

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