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We present a case of\n                    <jats:italic>Aggregatibacter actinomycetocomitans<\/jats:italic>\n                    (\n                    <jats:italic>Aa<\/jats:italic>\n                    ) prosthetic valve endocarditis, initially causing a transient ischaemic attack, inflammatory arthropathy, then intracerebral haemorrhage, the latter leading to diagnosis.\n                    <jats:italic>Aa<\/jats:italic>\n                    should be suspected in prosthetic valve recipients with sequential onset of inflammatory arthropathy and cerebrovascular disease.\n                  <\/jats:p>","DOI":"10.1136\/bcr-2025-266111","type":"journal-article","created":{"date-parts":[[2025,12,8]],"date-time":"2025-12-08T06:05:17Z","timestamp":1765173917000},"page":"e266111","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":0,"title":["<i>Aggregatibacter actinomycetocomitans<\/i>\n                    prosthetic valve endocarditis causing sequential transient ischaemic attack, rheumatoid factor-positive inflammatory polyarthritis and intracerebral haemorrhage"],"prefix":"10.1136","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0009-0003-1239-7201","authenticated-orcid":false,"given":"Laurence","family":"Preen","sequence":"first","affiliation":[{"name":"Royal Adelaide Hospital, Adelaide, South Australia, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jackson","family":"Harvey","sequence":"additional","affiliation":[{"name":"Royal Adelaide Hospital, Adelaide, South Australia, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Joshua","family":"Mahadevan","sequence":"additional","affiliation":[{"name":"Royal Adelaide Hospital, Adelaide, South Australia, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Timothy","family":"Kleinig","sequence":"additional","affiliation":[{"name":"Royal Adelaide Hospital, Adelaide, South Australia, 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