Improved multiple-locus variable-number tandem-repeat assay for Staphylococcus aureus genotyping, providing a highly informative technique together with strong phylogenetic value.

Details

Serval ID
serval:BIB_C54BAECDBFFB
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Improved multiple-locus variable-number tandem-repeat assay for Staphylococcus aureus genotyping, providing a highly informative technique together with strong phylogenetic value.
Journal
Journal of clinical microbiology
Author(s)
Pourcel C., Hormigos K., Onteniente L., Sakwinska O., Deurenberg R.H., Vergnaud G.
ISSN
1098-660X[electronic]
Publication state
Published
Issued date
2009
Volume
47
Number
10
Pages
3121-3128
Language
english
Notes
Publication types: Comparative Study ; Evaluation Studies ; Journal Article ; Research Support, Non-U.S. Gov't Publication Status: ppublish
Abstract
We describe an improved multiple-locus variable-number tandem-repeat (VNTR) analysis (MLVA) scheme for genotyping Staphylococcus aureus. We compare its performance to those of multilocus sequence typing (MLST) and spa typing in a survey of 309 strains. This collection includes 87 epidemic methicillin-resistant S. aureus (MRSA) strains of the Harmony collection, 75 clinical strains representing the major MLST clonal complexes (CCs) (50 methicillin-sensitive S. aureus [MSSA] and 25 MRSA), 135 nasal carriage strains (133 MSSA and 2 MRSA), and 13 published S. aureus genome sequences. The results show excellent concordance between the techniques' results and demonstrate that the discriminatory power of MLVA is higher than those of both MLST and spa typing. Two hundred forty-two genotypes are discriminated with 14 VNTR loci (diversity index, 0.9965; 95% confidence interval, 0.9947 to 0.9984). Using a cutoff value of 45%, 21 clusters are observed, corresponding to the CCs previously defined by MLST. The variability of the different tandem repeats allows epidemiological studies, as well as follow-up of the evolution of CCs and the identification of potential ancestors. The 14 loci can conveniently be analyzed in two steps, based upon a first-line simplified assay comprising a subset of 10 loci (panel 1) and a second subset of 4 loci (panel 2) that provides higher resolution when needed. In conclusion, the MLVA scheme proposed here, in combination with available on-line genotyping databases (including http://mlva.u-psud.fr/), multiplexing, and automatic sizing, can provide a basis for almost-real-time large-scale population monitoring of S. aureus.
Keywords
Bacterial Typing Techniques/methods, Carrier State/microbiology, Cluster Analysis, DNA Fingerprinting/methods, DNA, Bacterial/genetics, Genotype, Humans, Minisatellite Repeats, Molecular Epidemiology/methods, Phylogeny, Sensitivity and Specificity, Staphylococcal Infections/microbiology, Staphylococcus aureus/classification, Staphylococcus aureus/isolation & purification
Pubmed
Web of science
Open Access
Yes
Create date
10/02/2010 15:26
Last modification date
20/08/2019 16:40
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