Double-locus sequence typing using clfB and spa, a fast and simple method for epidemiological typing of methicillin-resistant Staphylococcus aureus

Détails

ID Serval
serval:BIB_EDAD607C0790
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Double-locus sequence typing using clfB and spa, a fast and simple method for epidemiological typing of methicillin-resistant Staphylococcus aureus
Périodique
Journal of Clinical Microbiology
Auteur(s)
Kuhn  G., Francioli  P., Blanc  D. S.
ISSN
0095-1137
Statut éditorial
Publié
Date de publication
01/2007
Peer-reviewed
Oui
Volume
45
Numéro
1
Pages
54-62
Notes
Evaluation Studies
Journal Article
Research Support, Non-U.S. Gov't --- Old month value: Jan
Résumé
Sequence-based epidemiological typing of methicillin-resistant Staphylococcus aureus (MRSA) has recently been promoted because it results in unambiguous data sets that can be organized in local and global databases. The replacement of previous typing methods, such as the highly discriminatory pulsed-field gel electrophoresis (PFGE), has been attempted with various markers and typing schemes, including spa typing and multilocus sequence typing. However, despite a number of advantages, none of these methods showed convincing evidence for performance in epidemiological typing comparable to that of PFGE. By using three sets of 48 MRSA strains comprising isolates that were (i) genetically highly diverse, (ii) genetically related, and (iii) obtained from long-term carriers, we analyzed the performance of the four highly polymorphic S. aureus markers: clfA, clfB, fnbA, and spa. Typeability, discriminatory power, in vivo stability, and evolution of these markers were compared to those of PFGE. Clearly, none of the markers alone could match the discriminatory power of PFGE (63 genotypes; index of discrimination of 0.96). Instead, this could be achieved by combining markers in pairs. We showed that by using only 3' partial sequences of approximately 500 bp, the majority of each marker's discriminatory power was displayed, and using the partial sequences, the best performance was obtained with the combination of clfB and spa (57 genotypes; index of discrimination of 0.94). Genetic changes were not observed for any of the sequence markers over a period of 3 years and in the case of partial sequences for a period of more than 4 years. This is in contrast to PFGE where changes occurred after several months. The genetic differences found between isolate pairs of long-term carriers and among highly related isolates indicated clonal evolution. A typing scheme based on 500-bp 3' partial sequences of clfB and spa is proposed.
Mots-clé
Adhesins, Bacterial/*genetics *Bacterial Typing Techniques Humans *Methicillin Resistance Molecular Sequence Data Sequence Analysis, DNA Staphylococcal Infections/*epidemiology/microbiology Staphylococcal Protein A/*genetics Staphylococcus aureus/*classification/*drug effects/genetics Time Factors
Pubmed
Web of science
Open Access
Oui
Création de la notice
29/01/2008 16:20
Dernière modification de la notice
20/08/2019 17:15
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