Japanese Journal of Infectious Diseases
Online ISSN : 1884-2836
Print ISSN : 1344-6304
ISSN-L : 1344-6304

This article has now been updated. Please use the final version.

Typing of Mycobacterium tuberculosis Strains in Gifu Prefecture, Japan, Using Variable Number Tandem Repeat Analysis
Katsuo KoshiMakiko NodaYukiko KadokuraYoshihiko Kameyama
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JOURNAL FREE ACCESS Advance online publication

Article ID: JJID.2020.1060

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Abstract

To investigate the molecular epidemiological characteristics of Mycobacterium tuberculosis strains collected in Gifu Prefecture, Japan, 483 M. tuberculosis clinical isolates were used for Japan Anti-Tuberculosis Association (JATA) 18-variable number tandem repeats (VNTR) analysis during 20152019. To estimate the lineages of M. tuberculosis strains, JATA18-VNTR profiles were applied to a maximum a posteriori method. The results revealed that the ancient Beijing subfamily, accounting for 57.3% (277/483) was the most prevalent M. tuberculosis strain. Furthermore, 18 clusters (GC-1–GC-18) were found by minimum spanning tree analysis. The proportion of clustering strains was 9.9% (48/483), and epidemiological links to these clusters were unclear without GC-6 and GC-18. Meanwhile, interestingly, VNTR profiles of GC-7–GC-9 and GC-14 were indistinguishable from the regional epidemic strains of Nagoya City, which has a strong socioeconomic relationship with Gifu Prefecture, but did not match the nationwide epidemic strains. This study suggests that coordinated analyses within prefectures with strong socioeconomic relationships are important.

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