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Korean J Lab Med. 2010 Feb;30(1):28-33. Korean. Original Article. https://doi.org/10.3343/kjlm.2010.30.1.28
Choi GE , Kang JE , Lee EY , Chang CL , Tateda K , Yamaguchi K , Kim KH , Kim JM .
Department of Laboratory Medicine, Pusan National University School of Medicine, Busan, Korea.
Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Tokyo, Japan.
Department of Laboratory Medicine, Dong-A University College of Medicine, Busan, Korea. jmkim@dau.ac.kr
Abstract

BACKGROUND: Antimicrobial susceptibility of Legionella spp. has rarely been studied in Korea. Therefore, we aimed to determine the susceptibility of Legionella spp. to various antibiotics. METHODS: We assessed the antimicrobial susceptibility of 66 environmental and clinical Legionella isolates collected between January 2001 and December 2008 from Korea and Japan. The minimum inhibitory concentrations (MICs) of 6 antibiotics, namely, azithromycin, ciprofloxacin, clarithromycin, clindamycin, gatifloxacin, and gemifloxacin were determined by the broth microdilution method using buffered starch yeast extract broth. RESULTS: The MIC ranges of the 6 antibiotics used against the Legionella isolates were as follows: 0.004-0.062 microgram/mL (azithromycin), 0.002-0.5 microgram/mL (ciprofloxacin), 0.004-0.5 microgram/mL (clarithromycin), 0.12-4 microgram/mL (clindamycin), 0.002-0.12 microgram/mL (gatifloxacin), and 0.008-1 microgram/mL (gemifloxacin). CONCLUSIONS: Legionella spp. isolates from Korea and Japan were most susceptible to gatifloxacin. Azithromycin, clarithromycin, ciprofloxacin, and gemifloxacin were also effective for treating legionellosis.

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