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Both patients had underlying comorbidities and immunosuppression, but differed in presentation, radiological findings and recovery. This case series aims to remind readers of the broad differential of pathogens that can lead to disease in the immunocompromised and that one should not dismiss atypical cultured bacteria as commensal too hastily.<\/jats:p>","DOI":"10.1136\/bcr-2020-237061","type":"journal-article","created":{"date-parts":[[2020,12,31]],"date-time":"2020-12-31T17:45:59Z","timestamp":1609436759000},"page":"e237061","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":9,"title":["<i>Hafnia alvei<\/i> pneumonia: a rare cause of infection in the multimorbid or immunocompromised"],"prefix":"10.1136","volume":"13","author":[{"given":"Austin","family":"Begbey","sequence":"first","affiliation":[{"name":"Respiratory Medicine, Tunbridge Wells Hospital, Tunbridge Wells, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8295-1138","authenticated-orcid":false,"given":"Joseph Henry","family":"Guppy","sequence":"additional","affiliation":[{"name":"Respiratory Medicine, Tunbridge Wells Hospital, Tunbridge Wells, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chithra","family":"Mohan","sequence":"additional","affiliation":[{"name":"Respiratory Medicine, Tunbridge Wells Hospital, Tunbridge Wells, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Simon","family":"Webster","sequence":"additional","affiliation":[{"name":"Respiratory Medicine, Tunbridge Wells Hospital, Tunbridge Wells, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"239","published-online":{"date-parts":[[2020,12,31]]},"reference":[{"key":"2025082712054923000_13.12.e237061.1","doi-asserted-by":"publisher","DOI":"10.1378\/chest.105.4.1098"},{"key":"2025082712054923000_13.12.e237061.2","unstructured":"Ewing WH . 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