{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,18]],"date-time":"2026-10-18T11:53:51Z","timestamp":1792324431750,"version":"4.4.0"},"reference-count":168,"publisher":"MDPI AG","issue":"14","license":[{"start":{"date-parts":[[2026,7,11]],"date-time":"2026-07-11T00:00:00Z","timestamp":1783728000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJMS"],"abstract":"<jats:p>Non-aeruginosa Pseudomonas (NAP) species represent a diverse and ubiquitous group of Gram-negative bacteria inhabiting a wide range of environmental niches, from soil and water to plant rhizospheres and clinical settings. While Pseudomonas aeruginosa has historically dominated clinical and research focus, the significance of NAP species, such as Pseudomonas fluorescens, Pseudomonas putida, and Pseudomonas stutzeri, as both opportunistic human pathogens and versatile biotechnological agents is increasingly recognized. Their remarkable genomic plasticity, driven by large accessory genomes and mobile genetic elements, underpins their metabolic versatility and adaptability but also facilitates the acquisition of virulence determinants and antibiotic resistance genes, contributing to their emergence in healthcare settings, particularly among immunocompromised individuals. This review provides a comprehensive analysis of NAP species, focusing on recent advances in their taxonomy facilitated by genomic tools like Whole-Genome Sequencing (WGS) and Multilocus Sequence Typing (MLST), which reveal complex species groups and challenge traditional classifications. We delve into the genomic landscape, exploring pangenome dynamics, horizontal gene transfer (HGT), and the genomic signatures that may differentiate clinical from environmental isolates. The clinical relevance of NAPs is examined, detailing the spectrum of infections, epidemiological trends, risk factors, and insights into virulence mechanisms, including secretion systems (T3SS, T6SS) and pathogenicity islands. Addressing a critical need, this review incorporates detailed sections on the diagnostic challenges posed by NAPs, including common misidentifications and the role of modern techniques like MALDI-TOF MS and WGS, and outlines current and novel therapeutic strategies, considering the growing problem of antimicrobial resistance (AMR) within this group. Furthermore, the biotechnological applications of NAPs in bioremediation and biocatalysis are discussed alongside evolving biosafety considerations, reflecting the shift from strict containment to integrated monitoring approaches for genetically engineered strains. By synthesizing current knowledge and highlighting research gaps, this review underscores the necessity of integrated, One Health approaches to understand and manage the dual nature of non-aeruginosa Pseudomonas species as both environmental inhabitants and clinically relevant pathogens.<\/jats:p>","DOI":"10.3390\/ijms27146210","type":"journal-article","created":{"date-parts":[[2026,7,13]],"date-time":"2026-07-13T08:53:58Z","timestamp":1783932838000},"page":"6210","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Beyond the Usual Suspects: Emerging Pseudomonas Species in Clinical and Environmental Niches"],"prefix":"10.3390","volume":"27","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5650-6911","authenticated-orcid":false,"given":"Andrea","family":"Marino","sequence":"first","affiliation":[{"name":"Department of Clinical and Experimental Medicine, Infectious Diseases Unit, ARNAS Garibaldi Hospital, University of Catania, 95122 Catania, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0653-9560","authenticated-orcid":false,"given":"Stefano","family":"Stracquadanio","sequence":"additional","affiliation":[{"name":"Department of Medicine and Surgery, University of Enna \u201cKore\u201d, 94100 Enna, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Federica","family":"Cosentino","sequence":"additional","affiliation":[{"name":"Department of Clinical and Experimental Medicine, Infectious Diseases Unit, ARNAS Garibaldi Hospital, University of Catania, 95122 Catania, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mariagiovanna","family":"Coco","sequence":"additional","affiliation":[{"name":"Department of Clinical and Experimental Medicine, Infectious Diseases Unit, ARNAS Garibaldi Hospital, University of Catania, 95122 Catania, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2156-7554","authenticated-orcid":false,"given":"Luigi","family":"La Via","sequence":"additional","affiliation":[{"name":"Department of General Surgery and Medical-Surgical Specialties (CHIRMED), University of Catania, 95123 Catania, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0000-9168-3246","authenticated-orcid":false,"given":"Alessandro","family":"Franz\u00f2","sequence":"additional","affiliation":[{"name":"Department of Clinical and Experimental Medicine, Infectious Diseases Unit, ARNAS Garibaldi Hospital, University of Catania, 95122 Catania, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Serena","family":"Spampinato","sequence":"additional","affiliation":[{"name":"Department of Clinical and Experimental Medicine, Infectious Diseases Unit, ARNAS Garibaldi Hospital, University of Catania, 95122 Catania, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8273-5382","authenticated-orcid":false,"given":"Emmanuele","family":"Venanzi Rullo","sequence":"additional","affiliation":[{"name":"Unit of Infectious Diseases, G. Martino University Hospital, Department of Clinical and Experimental Medicine, University of Messina, 98125 Messina, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1251-0185","authenticated-orcid":false,"given":"Antonino","family":"Maniaci","sequence":"additional","affiliation":[{"name":"Department of Medicine and Surgery, University of Enna \u201cKore\u201d, 94100 Enna, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8113-8452","authenticated-orcid":false,"given":"Giuseppe","family":"Nunnari","sequence":"additional","affiliation":[{"name":"Department of Clinical and Experimental Medicine, Infectious Diseases Unit, ARNAS Garibaldi Hospital, University of Catania, 95122 Catania, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,7,11]]},"reference":[{"key":"ref_1","first-page":"9","article-title":"Advances in understanding Pseudomonas","volume":"6","author":"Wiehlmann","year":"2014","journal-title":"F1000Prime Rep."},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Moradali, M.F., Ghods, S., and Rehm, B.H.A. 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