{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,2]],"date-time":"2026-04-02T03:25:40Z","timestamp":1775100340529,"version":"3.50.1"},"reference-count":47,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2025,7,25]],"date-time":"2025-07-25T00:00:00Z","timestamp":1753401600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Antibiotics"],"abstract":"<jats:p>Background\/Objectives: Among Enterobacterales, OXA-48-like-producing Proteus mirabilis strains have been scarcely detected. Herein, we characterized a blaOXA-48-harbouring P. mirabilis strain recovered from Greece (Pm GR-1), while phylogenomics and comparative genomics analyses with previously published blaOXA-48 carriers were also assessed. Methods: Characterization of Pm GR-1 was performed by the Vitek\u00ae Compact and Mass Spectrometry systems, antimicrobial susceptibility testing, detection of beta-lactamases, multilocus-sequence typing (MLST), and whole-genome sequencing (WGS). In silico prediction of mobile genetic elements (MGEs), genomic islands (GIs), antimicrobial resistance genes (ARGs) and virulence factors (VFs), and phylogenetic, core-genome SNP and comparative genomics analyses were executed using bioinformatic tools. Results: Pm GR-1 was isolated from a urine sample of an outpatient in a Greek hospital. It exhibited a multidrug-resistant phenotype, being susceptible only to amikacin and ceftazidime\/avibactam. It co-carried several beta-lactamase genes on the chromosome (blaOXA-48, blaCTX-M-14, blaTEM-1) and a plasmid (blaTEM-2) and several other ARGs, but also mutations associated with quinolone resistance in the DNA gyrase and topoisomerase IV subunits. It belonged to the international clone ST135 that has also been detected among OXA-48-producing P. mirabilis strains from Germany and the USA. Pm GR-1 was genetically related to those from Germany, sharing highly similar MGEs, GIs, ARGs and VFs, including the chromosomal blaOXA-48 genetic structure, the O-antigen locus, the flagella locus, the MR\/P fimbriae operon, and the urease gene cluster. Conclusions: To our knowledge, this is the first report from Greece of a blaOXA-48-possessing P. mirabilis strain. The emergence of blaOXA-48 among P. mirabilis strains of the international clone ST135 in different geographical regions is worrying. Close monitoring of these strains is required in One Health settings.<\/jats:p>","DOI":"10.3390\/antibiotics14080750","type":"journal-article","created":{"date-parts":[[2025,7,25]],"date-time":"2025-07-25T11:38:41Z","timestamp":1753443521000},"page":"750","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Genomic Insights of Emerging Multidrug-Resistant OXA-48-Producing ST135 Proteus mirabilis"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2522-1673","authenticated-orcid":false,"given":"Angeliki","family":"Mavroidi","sequence":"first","affiliation":[{"name":"Department of Microbiology, General University Hospital of Patras, 26504 Rio, Greece"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1845-0424","authenticated-orcid":false,"given":"Elisavet","family":"Froukala","sequence":"additional","affiliation":[{"name":"Department of Microbiology, Medical School, University of Athens, 11527 Athens, Greece"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nick","family":"Spanakis","sequence":"additional","affiliation":[{"name":"Department of Microbiology, Medical School, University of Athens, 11527 Athens, Greece"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0009-0003-3942-9293","authenticated-orcid":false,"given":"Aikaterini","family":"Michelaki","sequence":"additional","affiliation":[{"name":"Department of Microbiology, General Hospital G. Gennimatas, 11527 Athens, Greece"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0486-3666","authenticated-orcid":false,"given":"Maria","family":"Orfanidou","sequence":"additional","affiliation":[{"name":"Department of Microbiology, General Hospital G. Gennimatas, 11527 Athens, Greece"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Vasiliki","family":"Koumaki","sequence":"additional","affiliation":[{"name":"Department of Microbiology, Medical School, University of Athens, 11527 Athens, Greece"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0656-4715","authenticated-orcid":false,"given":"Athanasios","family":"Tsakris","sequence":"additional","affiliation":[{"name":"Department of Microbiology, Medical School, University of Athens, 11527 Athens, Greece"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2025,7,25]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Armbruster, C.E., Mobley, H.L.T., and Pearson, M.M. (2018). Pathogenesis of Proteus mirabilis infection. 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