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Global spread of three multidrug-resistant lineages of Staphylococcus epidermidis.

Abstract：

:Staphylococcus epidermidis is a conspicuous member of the human microbiome, widely present on healthy skin. Here we show that S. epidermidis has also evolved to become a formidable nosocomial pathogen. Using genomics, we reveal that three multidrug-resistant, hospital-adapted lineages of S. epidermidis (two ST2 and one ST23) have emerged in recent decades and spread globally. These lineages are resistant to rifampicin through acquisition of specific rpoB mutations that have become fixed in the populations. Analysis of isolates from 96 institutions in 24 countries identified dual D471E and I527M RpoB substitutions to be the most common cause of rifampicin resistance in S. epidermidis, accounting for 86.6% of mutations. Furthermore, we reveal that the D471E and I527M combination occurs almost exclusively in isolates from the ST2 and ST23 lineages. By breaching lineage-specific DNA methylation restriction modification barriers and then performing site-specific mutagenesis, we show that these rpoB mutations not only confer rifampicin resistance, but also reduce susceptibility to the last-line glycopeptide antibiotics, vancomycin and teicoplanin. Our study has uncovered the previously unrecognized international spread of a near pan-drug-resistant opportunistic pathogen, identifiable by a rifampicin-resistant phenotype. It is possible that hospital practices, such as antibiotic monotherapy utilizing rifampicin-impregnated medical devices, have driven the evolution of this organism, once trivialized as a contaminant, towards potentially incurable infections.

journal_name

Nat Microbiol

journal_title

Nature microbiology

authors

Lee JYH,Monk IR,Gonçalves da Silva A,Seemann T,Chua KYL,Kearns A,Hill R,Woodford N,Bartels MD,Strommenger B,Laurent F,Dodémont M,Deplano A,Patel R,Larsen AR,Korman TM,Stinear TP,Howden BP

doi

10.1038/s41564-018-0230-7

subject

Has Abstract

pub_date

2018-10-01 00:00:00

pages

1175-1185

issue

10

issn

2058-5276

pii

10.1038/s41564-018-0230-7

journal_volume

3

pub_type

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