passages.id: split_8_test_3411_passage
passages.type: progene_text
passages.text: In patients with reactive arthritis ( ReA ) / undifferentiated spondyloarthropathy ( uSpA ) , synovial fluid mononuclear cells ( SFMC ) show proliferation to bacterial antigens that trigger ReA , i.e. Chlamydia , Yersinia , Campylobactor , Shigella and Salmonella species .