M123-1

Midstream Urine: 100 x 10^6 cfu/L Enterococcus gallinarum – Shipped November 2012

HISTORY

The challenge was sent to category A, B, and C laboratories. The sample was a simulated midstream urine obtained from an 85 year old male in-patient with symptomatic UTI.

Participants were expected to isolate, report colony count, and identify Enterococcus gallinarum, as well as, report antibiotic susceptibilities.

MAIN EDUCATIONAL POINTS from M123-1

  1. Enterococci isolates screening or testing as vancomycin intermediate or resistant need to have the MIC confirmed using broth, agar dilution or E-test methods.
  2. Isolates with a vancomycin MIC of 8-16 mg/L need to be further identified to confirm E.gallinarum or E.casseliflavus or possible vancomycin resistant E.faecium or E.faecalis.

Full critique (PDF)

Posted in Clinical Bacteriology Results, critiques