title: Observations on sheep with polyarthritis produced by an agent of the psittacosis-lymphogranuloma venereum-trachoma group.
mesh_terms: D000818:Animals; D001170:Arthritis, Infectious / Q000473:pathology / Q000662:veterinary*; D002642:Chick Embryo; D002689:Chlamydia / Q000302:isolation & purification / Q000472:pathogenicity*; D003168:Complement Fixation Tests; D066298:In Vitro Techniques; D008854:Microscopy, Electron; D010341:Pathology, Veterinary; D012217:Rheumatoid Factor; D012756:Sheep; D012757:Sheep Diseases / Q000382:microbiology / Q000473:pathology; D013582:Synovial Fluid / Q000032:analysis; D013583:Synovial Membrane / Q000473:pathology
chemical_list: D012217:Rheumatoid Factor