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. 2022 Jul 5;204(8):459.
doi: 10.1007/s00203-022-03051-0.

Occurrence of blaNDM-7 and association with blaKPC-2, blaCTX-M15, aac, aph, mph(A), catB3 and virulence genes in a clinical isolate of Klebsiella pneumoniae with different plasmids in Brazil

Weverton de Oliveira Alves  1 , Alexsandra Maria Lima Scavuzzi  1 , Elizabeth Maria Bispo Beltrão  1 , Érica Maria de Oliveira  1 , Crhisllane Rafaele Dos Santos Vasconcelos  2 , Antônio Mauro Rezende  2 , Ana Catarina de Souza Lopes  3
Affiliations

Occurrence of blaNDM-7 and association with blaKPC-2, blaCTX-M15, aac, aph, mph(A), catB3 and virulence genes in a clinical isolate of Klebsiella pneumoniae with different plasmids in Brazil

Weverton de Oliveira Alves et al. Arch Microbiol. .

Abstract

To characterize phenotypically and genotypically an isolate of multidrug-resistant (MDR) K. pneumoniae from a patient with septicemia in a hospital in Recife-PE, Brazil, resistance and virulence genes were investigated using PCR and sequencing the amplicons, and the plasmid DNA was also sequenced. The K74-A3 isolate was resistant to all β-lactams, including carbapenems, as well as to aminoglycosides and quinolones. By conducting a PCR analysis and sequencing, the variants blaNDM-7 associated with blaKPC-2 and the cps, wabG, fim-H, mrkD and entB virulence genes were identified. The analysis of plasmid revealed the presence of blaCTX-M15, aac(3)-IVa, aph(3')-Ia, aph(4)-Ia, aac(6')ib-cr, mph(A) and catB3, and also the plasmids IncX3, IncFIB, IncQ1, ColRNAI and ColpVC. To our knowledge, this is the first report of the blaNDM-7 gene in Recife-PE and we suggest that this variant is located in IncX3. These results alert us to the risk of spreading an isolate with a vast genetic arsenal of resistance, in addition to which several plasmids are present that favor the horizontal transfer of these genes.

Keywords: Brazil; INCX3; Klebsiella pneumoniae; Resistance genes; Virulence genes; bla NDM-7.

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