Labs
CBC, ESR, CRP, , blood/throat cultures
Arthrocentesis
Cell count, gram stain, glucose, cultures
CBC, ESR, CRP, , blood/throat cultures
Cell count, gram stain, glucose, cultures
One point each
Non-weight bearing on affected side
ESR >40mm/hr
Fever
WBC >12,000
Probability by points
1 of 4 - 3%
2 of 4 - 40%
3 of 4 - 93%
4 of 4 - 99%
Non-weight bearing on affected side
ESR >40mm/hr
Fever
WBC >12,000
1 of 4 - 3%
2 of 4 - 40%
3 of 4 - 93%
4 of 4 - 99%
Septic arthritis 
Trauma
Monoarticular arthritis
Septic arthritis
Reactive arthritis
Acute Rheumatic Fever
Septic bursitis
Reactive Arthritis 