Symptoms with no other recognizable cause - at least 2:
(1) joint pain
(2) localized swelling at suspected joint or bursa
(3) tenderness at suspected joint or bursa
(4) heat at suspected joint or bursa
(5) evidence of effusion
(6) limitation of motion
Criteria 1:
(1) organism cultured from joint fluid or synovial biopsy
Criteria 2 - one of the following:
(1) evidence of joint or bursa infection seen during surgery
(2) evidence of joint or bursa infection by histopathologic examination
Criteria 3 - both of the following:
(1) at least two symptoms
(2) one of the following
(2a) organisms and white blood cells seen on Gram stain of joint fluid
(2b) positive antigen test on blood, urine or joint fluid
(2c) radiographic evidence of infection
(2d) cellular profile and chemistries of joint fluid compatible with infection and not explained by underlying rheumatologic disease
