Arthritis, ReactiveArthritis, InfectiousArthritisYersinia InfectionsArthritis, RheumatoidHLA-B27 AntigenYersinia enterocoliticaSyndromeSynovial FluidArthritis, ExperimentalChlamydia InfectionsSynovial MembraneArthritis, PsoriaticSalmonella InfectionsArthritis, JuvenileChlamydia trachomatisChlamydiaSpondylitis, AnkylosingSpondylarthropathiesYersiniaJointsCampylobacter InfectionsLymecyclineRheumatic DiseasesAntigens, BacterialSalmonella enteritidisHafniaAntibodies, BacterialEnteritisImmunoglobulin AUrethritisYersinia pseudotuberculosis InfectionsDown SyndromeMetabolic Syndrome XOsteoarthritisImmunoglobulin GKnee JointDysentery, BacillaryRats, Inbred LewImmunoglobulin MCampylobacter jejuniEnzyme-Linked Immunosorbent AssaySalmonellaShigella