{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,17]],"date-time":"2026-04-17T17:27:44Z","timestamp":1776446864803,"version":"3.51.2"},"reference-count":9,"publisher":"BMJ","issue":"3","license":[{"start":{"date-parts":[[2021,3,1]],"date-time":"2021-03-01T00:00:00Z","timestamp":1614556800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/bmj.com\/coronavirus\/usage"}],"content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Case Rep"],"accepted":{"date-parts":[[2021,2,16]]},"published-print":{"date-parts":[[2021,3]]},"abstract":"<jats:p>A previously healthy 53-year-old man was hospitalised for 12 days due to COVID-19 with shortness of breath. A few days after discharge from hospital, the patient developed fever and severe pain in several joints in the lower extremities. The pain was so severe that the patient was unable to stand on his feet. Synovial fluid from the right-side knee contained a high number of polynuclear cells and a few mononuclear cells. Microscopy, culture and PCR tests for bacterial infection were all negative. Furthermore, the patient tested negative for rheumatoid factor, anti-cyclic citrullinated peptide and human leukocyte antigen (HLA)-B27. Thus, the condition was compatible with reactive arthritis. The condition improved markedly after a few days\u2019 treatment with non-steroid anti-inflammatory drugs and prednisolone.<\/jats:p>","DOI":"10.1136\/bcr-2020-241375","type":"journal-article","created":{"date-parts":[[2021,3,2]],"date-time":"2021-03-02T10:58:01Z","timestamp":1614682681000},"page":"e241375","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":50,"title":["Reactive arthritis after COVID-19"],"prefix":"10.1136","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9636-4519","authenticated-orcid":false,"given":"Bo Langhoff","family":"H\u00f8nge","sequence":"first","affiliation":[{"name":"Department of Internal Medicine, Randers Regional Hospital, Denmark, Randers, Denmark"},{"name":"Department of Infectious Diseases, Aarhus University Hospita, Randers, Denmark"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Marie-Louise From","family":"Hermansen","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine, Randers Regional Hospital, Denmark, Randers, Denmark"},{"name":"Department of Rheumatology, Aarhus University Hospital, Aarhus, Denmark"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Merete","family":"Storgaard","sequence":"additional","affiliation":[{"name":"Department of Rheumatology, Aarhus University Hospital, Aarhus, Denmark"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2021,3,2]]},"reference":[{"key":"2025082709500206000_14.3.e241375.1","doi-asserted-by":"publisher","DOI":"10.1038\/s41591-020-0968-3"},{"key":"2025082709500206000_14.3.e241375.2","doi-asserted-by":"crossref","DOI":"10.1007\/s11926-020-00904-9","article-title":"Reactive arthritis: treatment challenges and future perspectives","volume":"22","author":"Wendling","year":"2020","journal-title":"Curr Rheumatol Rep"},{"key":"2025082709500206000_14.3.e241375.3","doi-asserted-by":"crossref","first-page":"846","DOI":"10.1016\/S0140-6736(09)61595-6","article-title":"Bacterial septic arthritis in adults","volume":"375","author":"Mathews","year":"2010","journal-title":"The Lancet"},{"key":"2025082709500206000_14.3.e241375.4","doi-asserted-by":"publisher","DOI":"10.1056\/NEJMoa2007764"},{"key":"2025082709500206000_14.3.e241375.5","article-title":"Dexamethasone in Hospitalized Patients with Covid-19 - Preliminary Report","author":"Horby","year":"2020","journal-title":"N Engl J Med"},{"key":"2025082709500206000_14.3.e241375.6","article-title":"Case of acute arthritis following SARS-CoV-2 infection","author":"Yokogawa","year":"2020","journal-title":"Ann Rheum Dis"},{"key":"2025082709500206000_14.3.e241375.7","doi-asserted-by":"publisher","DOI":"10.1136\/rmdopen-2020-001350"},{"key":"2025082709500206000_14.3.e241375.8","doi-asserted-by":"crossref","unstructured":"Saricaoglu EM , Hasanoglu I , Guner R . The first reactive arthritis case associated with COVID\u201019. 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