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KMID : 1100720150350060635
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Annals of Laboratory Medicine
2015 Volume.35 No. 6 p.635 ~ p.638
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Establishing Quality Control Ranges for Antimicrobial Susceptibility Testing of Escherichia coli, Pseudomonas aeruginosa, and Staphylococcus aureus: A Cornerstone to Develop Reference Strains for Korean Clinical Microbiology Laboratories
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Hong Sung-Kuk
Choi Seung-Jun
Shin Sae-Am
Lee Won-Mok
Pinto Naina
Shin Na-Ri
Lee Kwang-Jun
Hong Seong-Geun
Kim Young-Ah
Lee Hyuk-Min
Kim Hee-Jung
Song Won-Keun
Lee Sun-Hwa
Yong Dong-Eun
Lee Kyung-Won
Chong Yun-Sop
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Abstract
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Quality control (QC) processes are being performed in the majority of clinical microbiology laboratories to ensure the performance of microbial identification and antimicrobial susceptibility testing by using ATCC strains. To obtain these ATCC strains, some inconveniences are encountered concerning the purchase cost of the strains and the shipping time required. This study was focused on constructing a database of reference strains for QC processes using domestic bacterial strains, concentrating primarily on antimicrobial susceptibility testing. Three strains (Escherichia coli, Pseudomonas aeruginosa, and Staphylococcus aureus) that showed legible results in preliminary testing were selected. The minimal inhibitory concentrations (MICs) and zone diameters (ZDs) of eight antimicrobials for each strain were determined according to the CLSI M23. All resulting MIC and ZD ranges included at least 95% of the data. The ZD QC ranges obtained by using the CLSI method were less than 12 mm, and the MIC QC ranges extended no more than five dilutions. This study is a preliminary attempt to construct a bank of Korean QC strains. With further studies, a positive outcome toward cost and time reduction can be anticipated.
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KEYWORD
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Agar dilution test, Antimicrobial susceptibility test, Clinical microbiology laboratory, Disk diffusion test, Quality control, Reference strain
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