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High prevalence of carbapenem-resistant Klebsiella pneumoniae ST307 recovered from fecal samples in an Italian hospital.

Gloria MagiFederica TontarelliSara CaucciLaura Di SanteAndrea BrencianiGianluca MorroniEleonora GiovanettiStefano MenzoMarina Mingoia
Published in: Future microbiology (2021)
Aim: This study reports the characterization of carbapenem-resistant colonizing strains of K. pneumoniae. Methods: 650 stool samples were screened for carbapenem-resistant K. pneumoniae (CR-Kp). All strains were characterized for antibiotic susceptibility, typing features, main carbapenemases and extended-spectrum ß-lactamases. The carbapenemase transferability was assessed by interspecific conjugation. Results: Eighteen CR-Kp were multidrug resistant, five were KPC producing. A predominance of ST307 isolates, constituting the predominant cluster by PFGE analysis, was identified (50% were KPC-2 producers). Conjugation data showed the co-transfer of blaKPC-2, blaTEM-1, blaOXA-1, blaCTX-M-15 in a single large pKPN3-like plasmid. Conclusion: Our data pointed out the diversity of colonizing K. pneumoniae strains compared with clinical ones. The predominance of ST307 strains suggested an increased spreading, even in our area, of this high-risk clone.
Keyphrases
  • klebsiella pneumoniae
  • escherichia coli
  • multidrug resistant
  • drug resistant
  • acinetobacter baumannii
  • electronic health record
  • gram negative
  • big data
  • healthcare
  • respiratory tract
  • machine learning
  • acute care