For example in synovial fluids from septic arthritis and rheumatoid arthritis patients levels of 140 ng/ml and 190 ng/ml CCL18 were determined, respectively, whereas in the non-inflammatory conditions of osteoarthritis and crystal induced arthritis, the levels of CCL18 are 34 and 38 ng/ml [37]. The gene discussed is CCL18; the disease is bacterial arthritis.