Table 1.

Pertinent Laboratory Values

Laboratory	Value
CBC
Leukocyte count	8.5 K/μL
Hemoglobin	14.6 g/dL
Platelet count	294 K/μL
Inflammatory markers
CRP	21.87 mg/L
ESR	15 mm/hr
Knee fluid aspiration analysis (2 months preoperatively)
Gross findings	Red fluid and no synovial crystals
Cultures	Negative and sterile
Total nucleated cell count	1033 cells/microliters
Neutrophil count	70%
Lymphocyte count	29%
Knee fluid aspiration analysis (2 weeks preoperatively)
Gross findings	Red fluid and no synovial crystals
Cultures	Initially negative but grew mycobacterium (2 weeks later)
AFB smears	Negative Kinyoun, Fite, and modified Auramine-O stains
PCR	M. kansasii (4 weeks later)
WBC	1,3260 cells/μL
Neutrophils	93%
Lymphocytes	1%
Monocytes	6%

AFB = acid-fast bacilli, CRP = C-reactive protein, ESR = Erythrocye Sedimentation Rate, PCR = Polymerase Chain Reaction, WBC = white blood cell count