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  • Title: Circulation of a multiresistant, conjugative, IncA/C plasmid within the nosocomial Providencia stuartii population in the Athens area.
    Author: Giakkoupi P, Tryfinopoulou K, Polemis M, Pappa O, Miriagou V, Vatopoulos A.
    Journal: Diagn Microbiol Infect Dis; 2015 May; 82(1):62-4. PubMed ID: 25752202.
    Abstract:
    The objective of the study is to report a multidrug-resistant outbreak of Providencia stuartii that occurred in inpatients in the Athens area in 2012 resulting from a very successful transmissible A/C multidrug-resistant plasmid. Thirteen multidrug-resistant P. stuartii clinical isolates from 5 hospitals were studied. Molecular typing was performed by pulsed-field gel electrophoresis. Antibiotic resistance genes and their genetic surround were detected by PCR and sequencing. Plasmid analysis included conjugation experiments using liquid cultures, sizing by S1 digestion, and incompatibility replicon typing by PCR. Isolates were grouped into 2 distinct clonal types A and B, exhibiting similarity less than 70%. Isolates of type A were recovered from patients hospitalized in 4 different hospitals with no obvious epidemiological linkage, while isolates of type B were recovered from patients treated in a single hospital. Both clonal types harbored a conjugative plasmid of 130 bp and IncA/C replicon type carrying 5 β-lactamase genes bla(SHV-5), bla(VEB-1), bla(VIM-1), bla(OXA-10), and bla(TEM-1) and aminoglycosides resistant determinants. All β-lactamase genes were included in stable structures as IS26, IS1999, and In-e541. The current plasmid seemed to have many common determinants with previously reported plasmids derived from P. stuartii and Proteus mirabilis clinical isolates and exhibited the ability to circulate in nosocomial bacterial populations.
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