{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,22]],"date-time":"2026-05-22T10:06:35Z","timestamp":1779444395989,"version":"3.53.1"},"reference-count":15,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2026,5,22]],"date-time":"2026-05-22T00:00:00Z","timestamp":1779408000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Microorganisms"],"abstract":"<jats:p>Pseudomonas fluorescens is a rare, environmental Gram-negative bacterium that has been rarely reported as a cause of respiratory tract infections. This paper presents a case of a 72-year-old male who developed community-acquired pneumonia due to P. fluorescens. The diagnosis was made by sputum culture and he responded to meropenem treatment. A literature search revealed three previously reported cases of P. fluorescens pneumonia. These cases primarily affected elderly male patients. All reported patients demonstrated positive clinical outcomes following appropriate antimicrobial therapy. This case highlights that although P. fluorescens is often considered a colonizer, it may act as a potential pathogen in selected clinical settings.<\/jats:p>","DOI":"10.3390\/microorganisms14061169","type":"journal-article","created":{"date-parts":[[2026,5,22]],"date-time":"2026-05-22T09:17:09Z","timestamp":1779441429000},"page":"1169","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Pseudomonas fluorescens Pneumonia: A Case Report and Review of the Literature"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3017-1025","authenticated-orcid":false,"given":"Kadir Burak","family":"Akg\u00fcn","sequence":"first","affiliation":[{"name":"Department of Pulmonology, Hatay Mustafa Kemal University, 31060 Hatay, T\u00fcrkiye"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,5,22]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"R51","DOI":"10.1186\/gb-2009-10-5-r51","article-title":"Genomic and genetic analyses of diversity and plant interactions of Pseudomonas fluorescens","volume":"10","author":"Silby","year":"2009","journal-title":"Genome Biol."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"927","DOI":"10.1128\/CMR.00044-14","article-title":"Microbiology, Genomics, and Clinical Significance of the Pseudomonas fluorescens Species Complex, an Unappreciated Colonizer of Humans","volume":"27","author":"Scales","year":"2014","journal-title":"Clin. 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Microbiol."},{"key":"ref_6","doi-asserted-by":"crossref","unstructured":"Scales, B.S., Erb-Downward, J.R., Huffnagle, I.M., LiPuma, J.J., and Huffnagle, G.B. (2015). Draft Genome Sequences of Seven Pseudomonas fluorescens Subclade III Strains Isolated from Cystic Fibrosis Patients. Genome Announc., 3.","DOI":"10.1128\/genomeA.01285-14"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"28","DOI":"10.1186\/2049-2618-2-28","article-title":"Cell-associated bacteria in the human lung microbiome","volume":"2","author":"Dickson","year":"2014","journal-title":"Microbiome"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"62","DOI":"10.4103\/0974-2727.59701","article-title":"Nonfermenting gram-negative bacilli infections in a tertiary care hospital in kolar, karnataka","volume":"1","author":"Malini","year":"2009","journal-title":"J. Lab. 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Chemother."},{"key":"ref_12","doi-asserted-by":"crossref","unstructured":"Liu, X., Xiang, L., Yin, Y., Li, H., Ma, D., and Qu, Y. (2021). Pneumonia caused by Pseudomonas fluorescens: A case report. BMC Pulm. Med., 21.","DOI":"10.1186\/s12890-021-01573-9"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"92","DOI":"10.1016\/j.ijid.2024.01.007","article-title":"Pseudomonas fluorescens pneumonia","volume":"140","author":"Ishii","year":"2024","journal-title":"Int. J. Infect. Dis."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"1804","DOI":"10.1056\/NEJMra0904124","article-title":"Hospital-acquired infections due to gram-negative bacteria","volume":"362","author":"Peleg","year":"2010","journal-title":"N. Engl. J. 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