M193-2

Tissue: Bacteroides fragilis and Escherichia coli  – Shipped November 4, 2019 FINAL RESULT

HISTORY

A simulated tissue swab sample collected from a 50 year old male diabetic with Fournier’s gangrene was sent to category A laboratories.
Participants were expected to isolate and identify Escherichia coli and Bacteroides fragilis.

MAIN EDUCATIONAL POINTS from M193-2

  1. Fournier’s gangrene (see below) and most intraabdominal infections are associated with both aerobic and anaerobic bacterial species that act synergistically to promote the infection.
  2. The anaerobic component of the infection is important (60-70%) in both tissue infections such as Fournier’s, and in intraabdominal abscesses.

Full critique (PDF)

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