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KMID : 0311120110520010188
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Yonsei Medical Journal
2011 Volume.52 No. 1 p.188 ~ p.191
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Reduced Levofloxacin Susceptibility in Clinical Respiratory Isolates of Haemophilus Influenzae Is Not yet Associated with Mutations in the DNA Gyrase and Topoisomerase II Genes in Korea
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Kim In-Suk
Lee Nam-Yong
Kim Sun-Joo
Ki Chang-Seok
Kim Sun-Hee
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Abstract
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Among 155 clinical respiratory isolates of Haemophilus influenzae in Korea, 6 (3.9%) isolates had reduced levofloxacin susceptibility (MICs ≥ 0.5 μg/mL). These six isolates had no significant quinolone resistance-determining region (QRDR) mutations in gyrA,gyrB,parC, or parE. This phenomenon suggests that neither evolution nor spread of any significant QRDRs mutations in clinical isolates occurred in Korea. Therefore, continued surveillance is necessary to observe the evolution of antibiotic-resistance and take measures to avoid the spread of drug-resistant clones.
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KEYWORD
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Haemophilus influenzae, levofloxacin, quinolone, drug resistance, DNA gyrase, DNA topoisomerases, Type II
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