Open AccessHigh prevalence of spa type t571 among methicillin-susceptible Staphylococcus aureus from bacteremic patients in a French University Hospital
Author(s) -
Isabelle Bonnet,
Brune Millon,
H. Meugnier,
François Vandenesch,
Max Maurin,
Patricia Pavèse,
Sandrine Boisset
Publication year - 2018
Publication title -
plos one
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.99
H-Index - 332
ISSN - 1932-6203
DOI - 10.1371/journal.pone.0204977
Subject(s) - bacteremia , staphylococcus aureus , medicine , methicillin resistant staphylococcus aureus , staphylococcal infections , incidence (geometry) , genotype , population , typing , blood culture , microbiology and biotechnology , biology , antibiotics , environmental health , bacteria , biochemistry , genetics , physics , optics , gene
Staphylococcus aureus bacteremia is one of the most frequent severe bacterial infections worldwide, with an associated mortality of about 20–40% in developed countries. In 2013, we noted an increase in this infection in the teaching hospital in Grenoble, France, compared to 2012. The mean incidence of S . aureus bacteremia was 0.28 per 1,000 patient-days in 2012 and 0.35 per 1,000 patient-days in 2013. This trend was confirmed in 2014 (0.35 per 1,000 patient-days). In the present work we aimed to study the population of patients presenting with S . aureus bacteremia in 2013 and to genotype the corresponding S . aureus strains in order to identify a successful and/or virulent genotype to design a specific infection control program. One hundred ninety-one S . aureus isolates (including 9 methicillin-resistant) out of 199 corresponding cases of bacteremia were characterized with the spa typing method. Among 108 spa types, t571, t002, t008 and t084 were the most prevalent. Although not widely prevalent, t571 was the most frequently identified clone (8.4% of all isolates). Spa type t571 has been described in previous studies as belonging to the clonal complex CC398, which is consistent with the recent emergence of methicillin-susceptible S . aureus CC398 reported in blood cultures in Europe.