Joint fluid (knee): neutrophils, gram positive cocci (Staphylococcus aureus) – Shipped February 2013
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
- 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.
- Delays in diagnosis and therapy are associated with a significant rise in morbidity and mortality.