They all presented a blood stream infection caused by a strain of S. epidermidis that was resistant to meticillin, and diagnosed prospectively or retrospectively being resistant as well to linezolid, or not. Indeed, microbiological data was quite easily available as all the strains isolated from blood samples are conserved after congelation for many years. Nevertheless, we lack the profile toward linezolid susceptibility as this antibiotic was not routinely tested before 2014, corresponding to the moment we became aware of the problematic rising. A previous work thus consists to establish the incidence of the resistance.