Reemergence of Gentamicin-Susceptible Strains of Methicillin-Resistant Staphylococcus aureus in France: a Phylogenetic Approach

Author:

Blanc D. S.1,Francioli P.1,Le Coustumier A.2,Gazagne L.3,Lecaillon E.3,Gueudet P.3,Vandenesch F.4,Etienne J.4

Affiliation:

1. CHU Vaudois, Lausanne, Switzerland,1 and

2. Hôpital Champ le Roi, Neufchateau,2

3. CH Maréchal Joffre, Perpignan,3 and

4. Centre national de référence des Toxémies à Staphylocoques, Lyon,4 France

Abstract

ABSTRACT The reemergence of gentamicin-susceptible (Gen s ) methicillin-resistant Staphylococcus aureus (MRSA) isolates in France between 1992 and 1996 was investigated using a phylogenetic approach (multiprimer randomly amplified polymorphic DNA typing). Eighty-six percent (65 of 85) of the French strains were grouped into one phylogenetic cluster within which all but one Gen s strain were grouped into a subcluster. Thus, the reemergence of Gen s MRSA strains in France was likely due to the spread of one specific clone which belonged to a cluster comprising most French gentamicin-resistant (Gen r ) strains. This suggests that the Gen s clone has emerged from a Gen r strain of this cluster.

Publisher

American Society for Microbiology

Subject

Microbiology (medical)

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