Body Fluid Interpretation

Question 1

Peritoneal fluid cell count diagnostic for SBP

Answer 1

PMNs > 250 or WBC > 1000

Question 2

CSF cell count for diagnosis of meningitis

Answer 2

WBC > 1,000 for bacterial infection
Fungal infection: WBC < 500
Viral infection: WBC < 300

Question 3

Synovial fluid cell count for diagnosing septic arthritis

Answer 3

WBC > 50,000 and PMNs > 80%

WBC > 25,000 also concerning