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This study aimed to molecularly characterize hypervirulent <jats:italic>A. baumannii<\/jats:italic> strains isolated from ICU patients with respiratory infections. Six strains were isolated from ICU patients over one month. Isolates were identified by phenotypic characterization biochemical properties and 16s RNA sequencing. Antibiotic susceptibility testing was conducted followed by resistance genes detection by PCR. MLST, and PFGE were employed to analyse clonal relationships among strains. Plasmid replicon typing and plasmid transmission frequencies were determined. The isolated strains exhibited diverse clinical manifestations, including acute respiratory distress syndrome (ARDS). Antibiotic susceptibility testing revealed multidrug\u2010resistance phenotype. Molecular analysis revealed a complex genetic landscape of antibiotic resistance genes, including ESBLs and carbapenemases, as well as virulence genes such as <jats:italic>omp<\/jats:italic>A, <jats:italic>csu<\/jats:italic>E, and <jats:italic>exo<\/jats:italic>S. The multiple sequence types indicating genetic diversity among the strains as ST1512, ST622, and ST149 (each type two isolates). Plasmid characterization revealed the presence of diverse replicon types associated with multidrug resistance. This study provides comprehensive insights into the phenotypic, molecular, and epidemiological characteristics of hypervirulent <jats:italic>A. baumannii<\/jats:italic> outbark in ICU.<\/jats:p>","DOI":"10.1155\/2024\/9670708","type":"journal-article","created":{"date-parts":[[2024,9,18]],"date-time":"2024-09-18T14:19:34Z","timestamp":1726669174000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Phenotypic and Molecular Characterization of Hypervirulent and Multidrug\u2010Resistant <i>Acinetobacter baumannii<\/i> Isolated from ICU Respiratory 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