Table 1. Patient characteristics and results of investigations.

Parameter	Case 1	Case 2	Case 3
Age	58 years	48 years	69 years
Gender	female	female	male
How Arrived	In wheelchair	In wheelchair	crutches walking
Duration of symptoms	4 weeks	4 months	3 weeks
Blood Hb (mg/dL)	11.5	6.7	11.7
WBC (x109/dL)	13.5	6.7	9.8
ESR (mm /h)	120	80	50
CRP (mg/L)	275	28.52	13.01
Creatinine (µ mol/L)	74	70	75
Knee joint aspirate	Blood stained	Blood stained	Blood stained
Aspirate culture	no growth	no growth	no growth
Blood culture	“	“	“
Pus culture	“	“	“
Tissue culture	Staph. aureus	“	“
Histopathology	Acute infection	Acute infection	Chronic infection
Radiology	Rapid bone destruction & formation	Rapid bone destruction & formation	Rapid bone destruction