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Determination of Colistin Resistance by Simple Disk Diffusion Test Using Modified Mueller-Hinton Agar

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dc.contributor.author용동은-
dc.contributor.author김대원-
dc.contributor.author변정현-
dc.date.accessioned2020-09-29T01:47:56Z-
dc.date.available2020-09-29T01:47:56Z-
dc.date.issued2020-07-
dc.identifier.issn2234-3806-
dc.identifier.urihttps://ir.ymlib.yonsei.ac.kr/handle/22282913/179507-
dc.description.abstractBackground: Colistin has become a last-resort antibiotic for the management of multidrug-resistant gram-negative bacteria. The disk diffusion test is cheap and easy to perform but may be unreliable for colistin susceptibility testing due to poor diffusion of the large colistin molecule. An improved agar diffusion test would increase the reliability of colistin susceptibility testing. This study aimed to modify Muller-Hinton agar (MHA) to improve colistin diffusion in agar. Methods: MHA was modified by reducing the agar concentration from 100% to 30% and supplementing with protamine. We tested 60 gram-negative clinical isolates of Pseudomonas aeruginosa (N=27) and Acinetobacter calcoaceticus-baumannii complex (N=33). Disk diffusion test results were interpreted based on minimum inhibitory concentrations determined by broth microdilution. Results: The modified MHA yielded the best performance metrics, including 94.7% sensitivity, 100% specificity, and an area under the curve of 0.995 (95% confidence interval, 0.982-1.000), P<0.001, at a cut-off point of 13 mm. Conclusions: A reduction of the agar concentration from 100% to 30% and the addition of protamine improved colistin diffusion in agar and allowed routine colistin susceptibility testing in a clinical microbiology laboratory, but should be handled with caution.-
dc.description.statementOfResponsibilityopen-
dc.formatapplication/pdf-
dc.languageEnglish-
dc.publisherKorean Society for Laboratory Medicine-
dc.relation.isPartOfANNALS OF LABORATORY MEDICINE-
dc.rightsCC BY-NC-ND 2.0 KR-
dc.titleDetermination of Colistin Resistance by Simple Disk Diffusion Test Using Modified Mueller-Hinton Agar-
dc.typeArticle-
dc.contributor.collegeCollege of Medicine (의과대학)-
dc.contributor.departmentDept. of Laboratory Medicine (진단검사의학교실)-
dc.contributor.googleauthorJean Damascene Uwizeyimana-
dc.contributor.googleauthorDaewon Kim-
dc.contributor.googleauthorHyunsook Lee-
dc.contributor.googleauthorJung-Hyun Byun-
dc.contributor.googleauthorDongeun Yong-
dc.identifier.doi10.3343/alm.2020.40.4.306-
dc.contributor.localIdA02423-
dc.relation.journalcodeJ00164-
dc.identifier.eissn2234-3814-
dc.identifier.pmid32067429-
dc.subject.keywordColistin-
dc.subject.keywordColistin susceptibility testing-
dc.subject.keywordDisk diffusion-
dc.subject.keywordMuller-Hinton agar-
dc.subject.keywordProtamine-
dc.contributor.alternativeNameYong, Dong Eun-
dc.contributor.affiliatedAuthor용동은-
dc.citation.volume40-
dc.citation.number4-
dc.citation.startPage306-
dc.citation.endPage311-
dc.identifier.bibliographicCitationANNALS OF LABORATORY MEDICINE, Vol.40(4) : 306-311, 2020-07-
dc.identifier.rimsid67200-
dc.type.rimsART-
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Laboratory Medicine (진단검사의학교실) > 1. Journal Papers

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