イグチ　シゲカズ   Iguchi Shigekazu   井口　成一    所属   医学部 医学科（東京女子医科大学病院）    職種   非常勤講師
論文種別	原著
言語種別	英語
査読の有無	査読あり
表題	Geographical distribution and regional differences in 532 clinical isolates of rapidly growing mycobacterial species in Japan.
掲載誌名	正式名：Scientific reports 略　 称：Sci Rep ISSNコード：20452322/20452322
掲載区分	国外
巻・号・頁	11(1),pp.4960
著者・共著者	Kamada Keisuke†, Yoshida Atsushi, Iguchi Shigekazu, Arai Yuko, Uzawa Yutaka, Konno Satoshi, Shimojima Masahiro, Kikuchi Ken*
発行年月	2021/03
概要	Infectious diseases caused by nontuberculous mycobacteria (NTM) are increasingly becoming a major global problem. Additionally, Mycobacteroides abscessus subsp. abscessus (MAB) infections are refractory to macrolides. This study was conducted to investigate the epidemiology of rapidly growing mycobacteria (RGM) species isolated from clinical specimens in Japan and assess differences in the regional distribution of lower respiratory specimens (LRS)- and non-lower respiratory specimens (NLRS)-derived species. 532 strains (427 LRS, 92 NLRS and 15 unknown specimens) were isolated in nine areas of Japan. We collected 418 specimens from Bio Medical Laboratories (BML), Inc., and 114 specimens from 45 hospitals in Japan. Their epidemiological differences were examined according to the specimen type, region, and climate. Fifteen species were identified. The proportion of M. abscessus group (MAG) strains was significantly lower in NLRS than in LRS (35.9% vs. 68.4%). The proportion of MAG strains was higher in northern Japan than in other regions (83.7% vs. 60.5%). Variations in strain abundance among RGM species was evident in regions with a mean annual temperature below 15 °C. We conclude that the proportions of MAG strains differed between NLRS and LRS in Japan. In addition, the mean annual temperature likely influenced the distribution of RGM species.
DOI	10.1038/s41598-021-84537-7
PMID	33654194