although sometimes used to refer to any sterile arthritis occurring in association with infection , the term 'reactive arthritis ' is better reserved for arthritis following sexually acquired nonspecific urethritis or enteric infections with organisms such as shigella , salmonella , yersinia and campylobacter , because these arthropathies are unified by a number of shared clinical characteristics and an association with hla b27 .
C0003864
arthritis
C0022408
arthropathies