One of the HLA genes from the HLA B family. People who have this gene are more likely to have conditions such as reactive arthritis, psoriatic arthritis or ankylosing spondylitis. Infective arthritis - also known as septic arthritis, this is very different from reactive arthritis. It occurs when there is an active infection within a joint or joints, usually only one joint initially. It can happen as a complication of an artificial joint replacement or arthritis.
Septic arthritis is a medical emergency requiring hospital treatment.
It is presumed to be caused by unidentified bacteria. It can be treated with antibiotics. Accurate diagnosis needs a sample to be taken on a swab from the urethra. NSU can cause a burning sensation when passing urine, or a discharge, or it may have no symptoms. Parvovirus - cause of a common childhood illness known as 'fifth' disease or 'slapped cheek' syndrome.