reemergence of gentamicinsusceptible strains of methicillinresistant staphylococcus aureus in france a phylogenetic approach the reemergence of gentamicinsusceptible gens methicillinresistant staphylococcus aureus mrsa isolates in france between 1992 and 1996 was investigated using a phylogenetic approach multiprimer randomly amplified polymorphic dna typing eightysix percent 65 of 85 of the french strains were grouped into one phylogenetic cluster within which all but one gens strain were grouped into a subcluster thus the reemergence of gens mrsa strains in france was likely due to the spread of one specific clone which belonged to a cluster comprising most french gentamicinresistant genr strains this suggests that the gens clone has emerged from a genr strain of this cluster