What is the cause of rheumatoid arthritis?

In arthritis disease, the emergence of rheumatoid arthritis and patients in the life of many factors have a certain relationship. Such as the most common lifestyle, genetic factors, etc., will lead to the emergence of rheumatoid arthritis. So, what is the most important cause of the emergence of this disease? Experts have three main points:
1, viral factors, rheumatoid arthritis and the virus, especially the relationship between EB virus is one of the problems of domestic and foreign scholars attention. EB virus infection caused by arthritis and rheumatoid arthritis, rheumatoid arthritis patients with EB virus than normal people have a strong reactivity. In patients with rheumatoid arthritis in patients with serum and synovial fluid in a sustained high degree of anti-EB virus - membrane antigen antibody, but so far in patients with rheumatoid arthritis patients serum has not been found in the EB virus nuclear antigen or shell antigen antibody.

2, genetic factors, arthritis in some families in the higher incidence, in the crowd survey, found that human leukocyte antigen (HLA) -DR4 and RF-positive patients. HLA study found that DW4 and the incidence of rheumatoid arthritis, 70% of patients with HLA-DW4 positive, the patient has the susceptibility of the gene, so the genetic may play an important role in the disease.
3, bacterial factors, experimental studies have shown that mycoplasma made arthritis animal model and human rheumatoid arthritis similar, but does not produce human rheumatoid arthritis-specific rheumatoid factor. In the rheumatoid arthritis patients with synovial fluid and synovial tissue has never been found in bacterial or bacterial antigen substances, suggesting that bacteria may be associated with the onset of rheumatoid arthritis, but the lack of direct evidence.
For the above experts to introduce the three causes, are caused by rheumatoid arthritis, the main factor. Although we can not avoid genetic factors in the daily life of induced rheumatoid arthritis, but for the virus and bacterial factors, as long as we ensure a good living habits, can effectively reduce the emergence of this disease.