JUP and rheumatoid arthritis: The major objective of our study was to evaluate the extent to which serum antibodies against Pg and Aa in RA patients and non-RA controls (NC) reflect the subgingival presence of Pg and Aa, and to assess whether antibodies against these two pathogens can be related to the severity of periodontal inflammation and the levels of serum autoantibodies specific for RA.