What are the three rheumatic diseases?

Rheumatology refers to erythrocyte sedimentation rate (ESR), rheumatoid factor (RF), antistreptolysin "O"(ASO). 1. erythrocyte sedimentation rate (ESR) erythrocyte sedimentation rate is a non-specific detection index. Its elevation may indicate the existence of inflammation, infection, autoimmune diseases and other conditions in the body, but it cannot be determined by this item alone. Rheumatoid factor (RF) Rheumatoid factor has certain diagnostic significance for rheumatoid arthritis, but it is not its specific index. In addition to rheumatoid arthritis, some other autoimmune diseases, infectious diseases and even some healthy people may also appear rheumatoid factor positive. Therefore, rheumatoid factor positive alone can not diagnose rheumatoid arthritis, but needs to be combined with clinical symptoms, signs and other examinations. 3. Antistreptolysin" O"(ASO) Antistreptolysin" O" is mainly used to help diagnose diseases caused by streptococcal infection, such as rheumatic fever. When the body is infected with streptococci, it will produce corresponding antibodies, and antistreptolysin" O" levels may increase. However, it is not the only indicator for the diagnosis of rheumatic fever, but also needs to be combined with the patient's symptoms, signs and so on for comprehensive evaluation.