Immunological and Inflammatory reaction play a pivotal role in the initiation and perpetuation of rheumatoid arthritis .The present study is an attempt to measures the level of the rheumatoid factor antibody and to estimate the level of c-reactive protein in blood as a marker for inflammation in patients with rheumatoid arthritis in Babylon government . A total of (89) cases presenting rheumatoid arthritis with age range (9-68)years old of both sex and (25)person healthy controls were included in this study . Serum RF was detected using(Humatex RF kit) and c - reactive protein was detectedusing(Humatex CRP kit) which is a rapid agglutination test .CRP test was found to be positive in 84/89 cases of RA .
