Int. J. Mol. Sci. 2014, 15(1), 725-742; doi:10.3390/ijms15010725
Article

An Improved MLVF Method and Its Comparison with Traditional MLVF, spa Typing, MLST/SCCmec and PFGE for the Typing of Methicillin-Resistant Staphylococcus aureus

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Received: 15 November 2013; in revised form: 12 December 2013 / Accepted: 20 December 2013 / Published: 8 January 2014
(This article belongs to the Section Biochemistry, Molecular Biology and Biophysics)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: Methicillin-resistant Staphylococcus aureus (MRSA) has become an important nosocomial pathogen, causing considerable morbidity and mortality. During the last 20 years, a variety of genotyping methods have been introduced for screening the prevalence of MRSA. In this study, we developed and evaluated an improved approach capillary gel electrophoresis based multilocus variable-number tandem-repeat fingerprinting (CGE/MLVF) for rapid MRSA typing. A total of 42 well-characterized strains and 116 non-repetitive clinical MRSA isolates collected from six hospitals in northeast China between 2009 and 2010 were tested. The results obtained by CGE/MLVF against clinical isolates were compared with traditional MLVF, spa typing, Multilocus sequence typing/ staphylococcal cassette chromosome mec (MLST/SCCmec) and pulse field gel electrophoresis (PFGE). The discriminatory power estimated by Simpson’s index of diversity was 0.855 (28 types), 0.855 (28 patterns), 0.623 (11 types), 0.517 (8 types) and 0.854 (28 patterns) for CGE/MLVF, traditional MLVF, spa typing, MLST/SCCmec and PFGE, respectively. All methods tested showed a satisfied concordance in clonal complex level calculated by adjusted Rand’s coefficient. CGE/MLVF showed better reproducibility and accuracy than traditional MLVF and PFGE methods. In addition, the CGE/MLVF has potential to produce portable results. In conclusion, CGE/MLVF is a rapid and easy to use MRSA typing method with lower cost, good reproducibility and high discriminatory power for monitoring the outbreak and clonal spread of MRSA isolates.
Keywords: methicillin-resistant Staphylococcus aureus (MRSA); genotyping; multilocus variable-number tandem repeat fingerprinting (MLVF); capillary gel electrophoresis; pulse field gel electrophoresis (PFGE); Multilocus sequence typing (MLST); staphylococcal cassette chromosome mec (SCCmec)
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MDPI and ACS Style

Du, X.-F.; Xiao, M.; Liang, H.-Y.; Sun, Z.; Jiang, Y.-H.; Chen, G.-Y.; Meng, X.-Y.; Zou, G.-L.; Zhang, L.; Liu, Y.-L.; Zhang, H.; Sun, H.-L.; Jiang, X.-F.; Xu, Y.-C. An Improved MLVF Method and Its Comparison with Traditional MLVF, spa Typing, MLST/SCCmec and PFGE for the Typing of Methicillin-Resistant Staphylococcus aureus. Int. J. Mol. Sci. 2014, 15, 725-742.

AMA Style

Du X-F, Xiao M, Liang H-Y, Sun Z, Jiang Y-H, Chen G-Y, Meng X-Y, Zou G-L, Zhang L, Liu Y-L, Zhang H, Sun H-L, Jiang X-F, Xu Y-C. An Improved MLVF Method and Its Comparison with Traditional MLVF, spa Typing, MLST/SCCmec and PFGE for the Typing of Methicillin-Resistant Staphylococcus aureus. International Journal of Molecular Sciences. 2014; 15(1):725-742.

Chicago/Turabian Style

Du, Xue-Fei; Xiao, Meng; Liang, Hong-Yan; Sun, Zhe; Jiang, Yue-Hong; Chen, Guo-Yu; Meng, Xiao-Yu; Zou, Gui-Ling; Zhang, Li; Liu, Ya-Li; Zhang, Hui; Sun, Hong-Li; Jiang, Xiao-Feng; Xu, Ying-Chun. 2014. "An Improved MLVF Method and Its Comparison with Traditional MLVF, spa Typing, MLST/SCCmec and PFGE for the Typing of Methicillin-Resistant Staphylococcus aureus." Int. J. Mol. Sci. 15, no. 1: 725-742.

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