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M181-1

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Urine: >100 x 106 cfu/L Escherichia coli  – Shipped May 14, 2018

HISTORY

A simulated urine collected from a 32 year-old female with dysuria was sent to category A and C laboratories.
Participants were expected to report colony count, the presence of Escherichia coli and perform susceptibility testing.

MAIN EDUCATIONAL POINTS from M181-1

  1. Escherichia coli remains the most common and important pathogen from urine cultures in all populations.
  2. Significant changes with reporting of oral first-generation cephalosporin in Enterobacteriaceae have taken place in guidelines. Laboratories are reminded that cephalothin is no longer recommended as a surrogate for these agents, and cefazolin testing values should instead be used to predict their activity.

Full critique (PDF)

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