Arthritis, ReactiveArthritis, InfectiousArthritisYersinia InfectionsArthritis, RheumatoidHLA-B27 AntigenYersinia enterocoliticaSynovial FluidArthritis, ExperimentalChlamydia InfectionsSynovial MembraneArthritis, PsoriaticSalmonella InfectionsArthritis, JuvenileChlamydia trachomatisChlamydiaSpondylitis, AnkylosingSpondylarthropathiesYersiniaJointsCampylobacter InfectionsLymecyclineRheumatic DiseasesAntigens, BacterialSalmonella enteritidisHafniaAntibodies, BacterialEnteritisUrethritisImmunoglobulin AYersinia pseudotuberculosis InfectionsOsteoarthritisImmunoglobulin GKnee JointDysentery, BacillaryRats, Inbred LewImmunoglobulin MSalmonellaCampylobacter jejuniShigellaEnzyme-Linked Immunosorbent Assay