{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,20]],"date-time":"2026-10-20T17:18:56Z","timestamp":1792516736134,"version":"4.5.0"},"reference-count":14,"publisher":"BMJ","issue":"2","content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Case Rep"],"accepted":{"date-parts":[[2021,1,19]]},"published-print":{"date-parts":[[2021,2]]},"abstract":"<jats:p>We report a case of chronic Q fever presenting with catastrophic bleeding from an infected abdominal aortic aneurysm causing a primary aortoduodenal fistula in an 80-year-old retired farmer. This presentation is rarely reported in literature and only through case reports. Early diagnosis and definitive surgery were critical to a successful outcome. Serological diagnosis of Q fever was initiated on the patient\u2019s past exposure to animal reservoirs. Complicating the case was ongoing gastrointestinal bleeding postsurgery, with multiple endoscopies undertaken before a culprit remnant fistula was found. This case highlights the value in considering <jats:italic>Coxiella burnetii<\/jats:italic> as an underlying cause in patients with known risk factors presenting with primary aortoduodenal fistulas. Though rare, it represents a readily treatable cause.<\/jats:p>","DOI":"10.1136\/bcr-2020-238373","type":"journal-article","created":{"date-parts":[[2021,2,4]],"date-time":"2021-02-04T18:02:24Z","timestamp":1612461744000},"page":"e238373","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":2,"title":["Primary aortoduodenal fistula and chronic Q fever infection"],"prefix":"10.1136","volume":"14","author":[{"given":"Cuong Nghi","family":"Do","sequence":"first","affiliation":[{"name":"Department of Infectious Diseases, Princess Alexandra Hospital, Brisbane, Queensland, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4088-3795","authenticated-orcid":false,"given":"Ethan Oskar","family":"Mar","sequence":"additional","affiliation":[{"name":"Department of Infectious Diseases, Princess Alexandra Hospital, Brisbane, Queensland, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Beatrice","family":"Sim","sequence":"additional","affiliation":[{"name":"Department of Infectious Diseases, Princess Alexandra Hospital, Brisbane, Queensland, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"David","family":"Looke","sequence":"additional","affiliation":[{"name":"Department of Infectious Diseases, Princess Alexandra Hospital, Brisbane, Queensland, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"239","published-online":{"date-parts":[[2021,2,4]]},"reference":[{"key":"2025082708350200000_14.2.e238373.1","doi-asserted-by":"publisher","DOI":"10.1128\/CMR.12.4.518"},{"key":"2025082708350200000_14.2.e238373.2","unstructured":"Public Health Laboratory Network . 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