M122-4

Blood Culture: Aggregatibacter aphrophilus (Haemophilus aphrophilus)- Shipped August 2012

HISTORY

The challenge was sent to category A laboratories. The sample was a simulated blood culture obtained from a 45 year old patient with the history of recent dental work.

Laboratories were expected to isolate, identify, and report Aggregatibacter aphrophilus. This was an identification challenge and susceptibilities were not required.

MAIN EDUCATIONAL POINTS from M122-4

  1. A. aphrophilus may be difficult to differentiate from other HACEK related organisms so laboratories must use reference flow charts and manuals.
  2. Commercial identification systems may require supplemental classical tests in order to confirm identification or referral to a reference laboratory for identification.

Full critique (PDF)

Posted in Clinical Bacteriology Results, critiques