M182-5

Bone (swab): Staphylococcus epidermidis  – Shipped August 13, 2018

HISTORY

A simulated bone sample collected from 43-year-old male with sternal bone infection was sent to category A laboratories.

Participants were expected to identify Staphylococcus epidermidis and report susceptibility results.

 

MAIN EDUCATIONAL POINTS from M182-5

  1. Coagulase-negative staphylococci are most commonly part of the skin flora, but can be pathogenic, especially in infections involving prosthetic material, such as prosthetic joint infections, central line infections, including prosthetic valve endocarditis. Coagulase-negative staphylococci are also a common cause of sternal osteomyelitis.
  2. Susceptibility testing for coagulase-negative staphylococci in relevant clinical infections is important. As many of these isolates are resistant to cefazolin/oxacillin, testing of vancomycin and other agents is important.

Full critique (PDF)

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