GS124-2

Joint fluid (knee): neutrophils, gram positive cocci (Staphylococcus aureus) – Shipped February 2013

HISTORY

The challenge was sent to category A, B, C, and C1 laboratories. The sample was a simulated joint fluid obtained from a 45 year old man with a hot knee.

Laboratories were expected to report the presence of neutrophils and gram positive cocci.

MAIN EDUCATIONAL POINTS from GS124-2

  1. It is important that laboratories correctly differentiate and report the predominant WBC type in sterile samples. This assists in identifying the etiologic agent that would most likely be present in such samples.
  2. Delays in diagnosis and therapy are associated with a significant rise in morbidity and mortality.

 

Full critique (PDF)

Posted in Clinical Bacteriology Results, critiques, Gram