期刊
JOURNAL OF MICROBIOLOGY IMMUNOLOGY AND INFECTION
卷 55, 期 2, 页码 234-240出版社
ELSEVIER TAIWAN
DOI: 10.1016/j.jmii.2021.02.009
关键词
Agar dilution; Disk diffusion; Multilocus sequence typing; Oxacillin resistance; SCCmec; Staphylococcus lugdunensis
资金
- Ministry of Science and Technology [MOST 107-2320-B-182A-021-MY3, 107-2320-B-182A-018, 109-2320-B-010-036-MY3]
- Chang Gung Me-morial Hospital [CMRPG3K1421]
Staphylococcus lugdunensis is a critical pathogenic species, and this study aimed to evaluate different methods for detecting oxacillin-resistant S. lugdunensis isolates. MLST analysis revealed the clonality of S. lugdunensis isolates, with ST6 being the most common. OAD showed higher accuracy for detecting ORSL compared to CDD and mecA PCR.
Background/p urpose: Staphylococcus lugdunensis is a Gram-positive coagulase-negative bacterium and is recognized as a critical pathogenic species recently. Here, we aimed to evaluate the cefoxitin disk diffusion (CDD), oxacillin agar dilution (OAD), and mecA PCR for detecting oxacillin-resistant S. lugdunensis (ORSL) isolates.Methods: Multilocus sequence typing (MLST) analysis was performed to determine the clonality of 117 S. lugdunensis isolates isolated between May 2009 and Jul 2014. CDD, OAD, and mecA PCR were used to identify oxacillin-resistant S. lugdunensis (ORSL).Results: MLST results showed that the most common sequence type (ST) of our S. lugdunensis isolates was ST6 (35.9%) followed by ST3 (28.2%), ST27 (17.9%), and ST4 (6.8%). CDD and OAD showed that 39 and 43 isolates were ORSL, respectively. 4 ST3 CDD-susceptible S. lugdunensis (OSSL) isolates had MIC values > 4 for oxacillin. mecA PCR results showed that 43 OAD-resistant S. lugdunensis and 3 OAD-susceptible ST27 S. lugdunensis had the mecA gene. Therefore, OAD was used as the gold standard to evaluate the performance of CDD and mecA PCR for identi-fying ORSL. The overall sensitivity, specificity, and accuracy of CCD for ORSL detection was 90.7%, 100%, and 96.8%, respectively. The sensitivity, specificity, and accuracy of mecA PCR for identifying ORSL was 100%, 95.9%, and 97.44%, respectively. Conclusion: Our results indicate that OAD shows higher accuracy for ORSL detection compared with CDD and mecA PCR.Copyright 2021, Taiwan Society of Microbiology. Published by Elsevier Taiwan LLC. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
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