Skip to main content
Download PDF

Bloodstream Infections caused by Klebsiella pneumoniae and Serratia marcescens isolates co-harboring NDM-1 and KPC-2

Annals of Clinical Microbiology and Antimicrobials volume 20, Article number: 57 (2021) Cite this article

Abstract

Carbapenem-resistant Enterobacteriaceae are a worldwide health problem and isolates carrying both blaKPC-2 and blaNDM-1 are unusual. Here we describe the microbiological and clinical characteristics of five cases of bloodstream infections (BSI) caused by carbapenem-resistant Klebsiella pneumoniae and Serratia marcescens having both blaKPC-2 and blaNDM-1. Of the five blood samples, three are from hematopoietic stem cell transplantation patients, one from a renal transplant patient, and one from a surgical patient. All patients lived in low-income neighbourhoods and had no travel history. Despite antibiotic treatment, four out of five patients died. The phenotypic susceptibility assays showed that meropenem with the addition of either EDTA, phenylboronic acid (PBA), or both, increased the zone of inhibition in comparison to meropenem alone. Molecular tests showed the presence of blaKPC-2 and blaNDM-1 genes. K. pneumoniae isolates were assigned to ST258 or ST340 by whole genome sequencing. This case-series showed a high mortality among patients with BSI caused by Enterobacteriae harbouring both carbapenemases. The detection of carbapenemase-producing isolates carrying both blaKPC-2 and blaNDM-1 remains a challenge when using only phenotypic assays. Microbiology laboratories must be alert for K. pneumoniae isolates producing both KPC-2 and NDM-1.

Introduction

In the last decade, several studies have reported the emergence of Gram-negative bacteria carrying multiple carbapenemases isolated from patients with distinct pathologies [1,2,3,4,5,6]. However, clinical isolates harbouring simultaneously KPC-2 and NDM-1 carbapenemases are less common [7,8,9,10,11,12]. Previous reports describing the production of both carbapenemases include clinical isolates of Klebsiella pneumoniae [7,8,9], Klebsiella oxytoca [10], Enterobacter cloacae [11, 12], and Enterobacter hormaechei [13], collected from rectal swabs, blood samples, urinary tract infections, and wound infections as well. Regarding Serratia marcescens, clinical isolates harbouring simultaneously KPC-2 and IMP-10 [14] or KPC-2 and SRT-2 [15] were described.

The production of carbapenemases, such as Klebsiella pneumoniae carbapenemase (KPC) and the New Delhi metallo-β-lactamase (NDM), constitutes one of the most important mechanisms of resistance to β-lactam antibiotics [16]. As the emergence of carbapenem-resistant clinical isolates has become a serious clinical challenge due to the limited treatment options, the presence of multiple carbapenemases from the same strain further aggravates this issue.

Regarding the Brazilian data, NDM producers were originally detected in the southern regions of Brazil and have since moved into other states [17]. According to surveillance data, bacterial pathogens producing KPC alone are the main cause of bloodstream infections (BSI) in intensive care unit patients (21%) in the state of São Paulo [18]. Reports from Brazil also indicate that NDM and KPC producers carry resistance genes other than KPC-2 and NDM-1 conferring resistance to other antimicrobials classes rather than β-lactam [12, 13, 19]. The present study describes the clinical and microbiological features of five, namely K. pneumoniae (n = 4) and S. marcescens (n = 1), co-harboring KPC-2 and NDM-1, collected from bloodstream infections (BSI).

Material and methods

Four carbapenem-resistant K. pneumoniae and one carbapenem-resistant S. marcescens were obtained from blood cultures during 2012 and 2016. The patients were hospitalized at Hospital das Clínicas, Faculdade de Medicina da Universidade de São Paulo, a tertiary teaching hospital in São Paulo, Brazil. These isolates belong to the Microbiology Laboratory Biobank.

Vitek II (bioMerieux, Marcy-l'Étoile, France) was used to identify the isolates KP1411, KP4301, KP158, and SM1581. The isolate KP4990 was identified using matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS; Bruker, Billerica, Massachusetts, USA).

To confirm the susceptibility pattern, the minimum inhibitory concentrations (MICs) were determined using Sensititre Gram Negative GNX3F AST Plate (TREK Diagnostic Systems, Cleveland, OH, USA). The antimicrobials tested were aztreonam, meropenem, imipenem, ceftazidime, colistin, amikacin, tigecycline, and ciprofloxacin [20]. The susceptibility test results were interpreted according to Clinical Laboratory Standards Institute (CLSI) M100 [21] criteria. Isolates were considered susceptible if the MIC of carbapenems were ≤ 1 mg/mL, intermediate if MIC = 2 mg/mL, and resistant with MICs ≥ 4 mg/mL [22]. Escherichia coli ATCC25922 was used as a quality control strain and K. pneumoniae ATC 700603 as carbapenem-resistant Enterobacteriaceae control strain.

To precisely detect the genes coding for the carbapenemases KPC and NDM, we performed PCR using previously described primers for blaKPC-2 and blaNDM-1 [22,23,24]. The amplicons were submitted to Sanger Sequencing using MegaBACE 1000 (ABI 3730 DNA Analyser; Applied Biosystems, Alameda, CA) to confirm gene identity.

To determine the genotypic profile including resistance and virulence genes, whole genome sequencing (WGS) was performed by Illumina MiSeq. For WGS, total DNA was extracted with Illustra bacteria genomicPrep Mini Spin Kit (GE Healthcare Life Sciences, Marlborough, USA). DNA quality was verified using the NanoDrop spectrophotometer (Thermo Scientific, Delaware, USA). The quality of the files generated in the sequencing was evaluated by FastQC v.0.11.3 and Trimmomatic v.0:33. Genome assembly was performed using Velvet Optimiser v.2.2.5 and annotated with Prokka v.1:11 [25,26,27]. The sequence type (ST) of the isolates was determined with MLSTfinder tool [28] and confirmed in the PubMLST (https://pubmlst.org/kpneumoniae/info/primers.shtml) database. The gene blaKPC-2 was manually investigated using Artemis v.16.0.0.

Additional phenotypic analysis was done to confirm carbapenem resistance, using the disk diffusion (DD) method described by Migliavacca et al. [29], and the CLSI breakpoints for carbapenems. Meropenem (MPM) commercial disks containing 10 µg (Sensidisc DME, Araçatuba, BRA) were added with 0.05 M of ethylenediaminetetraacetic acid (EDTA) (Sigma-Aldrich, St. Louis, USA) and/or 20 μg/mL of phenylboronic acid (PBA) (Sigma-Aldrich, St. Louis, USA). According to Migliavacca et al. [29], a difference of ≥ 4 mm in the inhibition diameter zone was used as criteria to determine whether the isolates produce a serine carbapenemase, a metallo-β-lactamase, or both, in presence of EDTA and/or PBA, respectively, when compared to the MPM disk alone. E. coli ATCC25922 was used as negative quality control.

Results

The five clinical isolates analysed in the present study were collected from BSI of five patients submitted to hematopoietic stem cell transplant (n = 3), renal transplant (n = 1), and soft tissue surgery (n = 1) (see Fig. 1). All patients lived in low-income neighbourhoods in São Paulo, had less than eight years of schooling, and had no history of international travel.

Fig. 1
figure 1

Phylogenies of K. pneumoniae showing the same clone ST340 in the BMT unit and the globally disseminated, ST258 in Renal Transplant Unit

Full size image

The patients in this study were individuals with severe conditions and prolonged hospitalization, varying between 16 to 51 days after diagnosed with BSI by multi-drug resistant (MDR) agents. Three of the four patients infected by K. pneumoniae died within the course of the treatment, two of them deceased two days after the diagnosis, and one died 40 days after BSI culture turned positive. The patient infected by S. marcescens died 11 days after diagnosis.

After blood culture results, tigecycline and colistin were added to the treatment of the K. pneumoniae (n = 4) infected patients, who at that point had been receiving meropenem or cefepime. The patient infected with S. marcescens was receiving ciprofloxacin and clindamycin, increased to tigecycline and fosfomycin after the blood culture result. Detailed clinical data is shown in the Table 1.

Table 1 Underlying clinical conditions, antibiotic therapy, outcome, and phenotypic analyze
Full size table

Microdilution susceptibility testing demonstrated that all isolates were resistant to at least two carbapenems. All the isolates were susceptible to ceftazidime plus avibactam and tigecycline. However, the use of ceftazidime with avibactam was not available in Brazil for clinical use during the study and just one patient was competent to receive the drug under a research protocol. The isolates KP1411, KP4301, and KP4990 were susceptible to colistin, being KP1411 also susceptible to amikacin (Table 1). Phenotypic tests with specific β-lactamase inhibitors revealed the presence of serine carbapenemases and metallo-β-lactamases. Meropenem with either EDTA and/or PBA showed an increased zone of inhibition in comparison to meropenem disk alone.

The isolates KP1411, KP4301, and KP4990 had full growth around the meropenem disk and, when either EDTA and/or PBA was added to the meropenem disk, an inhibition zone higher than 9 mm was obtained. However, the isolates KP1411 and KP4301 presented a double ring reaction surrounding the disk with MPM and EDTA, two clear different zones of growth for the same bacteria. The experiment was repeated three times, all with the same pattern. The isolate KP4301 presented a phantom zone around the disk with MPM, EDTA, and PBA. The remaining two isolates, S. marcescens SM1581 and KP1581 did not show differences higher than 4 mm in the zone of inhibition in any of the combinations (Table 1).

In addition to blaKPC-2 in all the isolates, the WGS analysis led to the identification of other resistance and virulence genes, such as fosA in the isolate KP4301. The blaNDM-1 gene was detected only by PCR and confirmed by DNA sequencing by Sanger, but not in WGS, which could be due to loss of gene due our extraction protocol which was designed for genomic DNA and could not categorize low copy plasmid DNA or impairment of sequencing platform. Besides the resistance genes, the WGS analysis showed virulence genes related with adhesion, efflux pumps, iron acquisition, regulation, and secretion systems in the four K. pneumoniae isolates. Each of the genes were analyzed separately (Table 2). The WGS data were used for further MLST analysis of the isolates representing the two common STs for K. pneumoniae, ST258 and ST340. Isolates KP1411, KP4301, and KP1581 were assigned to ST340 and isolate KP4990 to ST258.

Table 2 Minimal inhibitory concentration, virulence and resistance-associated genes identified by whole genome sequence
Full size table

Due to the phenotypic profile of the samples, PCR analysis was performed and detected blaKPC-2 and blaNDM-1 genes in all five strains. The PCR result was confirmed by Sanger sequencing.

Discussion

To the best of our knowledge, this is the first report describing K. pneumoniae and S. marcescens clinical isolates harbouring simultaneously blaKPC-2 and blaNDM-1. The presence of these resistance genes was not previously described in K. pneumoniae ST258 and ST340 worldwide.

The ST258 emerged during the early 2000s as a hybrid clone created by recombination between ST11, ST442, and the ST340, which is a single-locus variant of ST11 [30]. These isolates tend to be pan-resistant, restricting the therapeutic options, particularly to S. marcescens isolates, since they are intrinsic resistance to polymyxins [31].

The dissemination of NDM-1 and KPC-2 in Brazil is of great concern since a Providencia rettgeri isolate carrying NDM-1 was described in the South region in 2013 [19]. Subsequently, Rozales et al. [17] published a study analysing 1134 isolates of Enterobacteriaceae, among which 11 isolates (0.97%) harboured blaNDM-1. Noteworthy, none of these cases had a history of traveling outside Brazil, which suggest local acquisition. The isolates analysed in the present study were collected from patients with risk factors contributing to infection by multidrug resistant pathogens, e.g., low socioeconomic class, low educational background, severe clinical conditions, and poor functional status [8, 31, 32].

Outside the hospital setting, another aggravating factor is the lack of basic sanitation in the country. Ecological surveillance studies found KPC-2 producing K. pneumoniae isolates (ST340) in urban rivers in the city of São Paulo, Brazil [33]. Such finding may confirm improper treatment of hospital sewage being discarded in the rivers and rising a hypothesis regarding the correlation among environmental and hospital isolates.

Our isolates displayed high-level of resistance to β-lactams, aminoglycosides, and fluoroquinolones. Carbapenem-resistant enterobacteria isolates carrying blaNDM-1 are more likely to be resistant to several antibiotics. They are often accompanied by other resistance genes, associated with resistance to β-lactams, fluoroquinolones, and aminoglycosides, that corroborates Kumarasamy et al., 2010 data, who analysed 111 isolates of K. pneumoniae producing NDM-1 from India and United Kingdom. Their isolates displayed resistance to fluoroquinolones and aminoglycosides [7].

Although the isolate KP1581 is colistin-resistant, the WGS did not show plasmid mediated resistance genes or previously described chromosomal mutations that lead to colistin resistance. Therefore, we speculate that the resistance derived from virulence genes encoded from lipopolysaccharide (LPS) rfb locus. The genes wzm and wzt, codify a transmembrane ATP-binding cassette transporter (ABC). It plays an important role in the synthesis of cell surface LPS [34]. The Wzt protein dictates the specificity of the substrate and the glycan chain length, which serves as an export signal recognized by the ABC transporter. The isolate KP1581 carries just the wzm gene. Thus, our hypothesis is that it has wzt trapped by the transporter in a state incapable to complete the O-PS export. It might explain the colistin resistance, specifically because, in K. pneumoniae, the cytosolic glycan synthesis and export are obligatorily coupled [35].

The main limitations of this study are the small number of samples and the fact they belong to different genera. Even though, the presence of blaKPC-2 and blaNDM-1 might have contributed to an unfavourable clinical outcome, considering that four of the patients died from the same conditions without blood culture clearance.

In conclusion, the detection of carbapenemase-producing isolates carrying both blaKPC-2 and blaNDM-1 remains a challenge. Additional effort is required to identify isolates when using only phenotypic assays. Thus, routine microbiology laboratories must be on alert for isolates possessing both β-lactamases.

Availability of data and materials

The isolates’ WGS are kept at the GeneBank under the numbers:

KP1411-Klebsiella pneumoniae—QOIJ00000000.

KP1581-Klebsiella pneumoniae—QOII00000000.

KP4301-Klebsiella pneumoniae—JABBZC000000000.

SM1756-Serratia marcescens—QJPQ00000000.

KP4990-Klebsiella pneumoniae—QOTZ00000000.

The isolates’ Sanger sequence are kept at the GeneBank under the numbers: (Gene blaKPC e blaNDM).

blaNDM_1411-MT721962.

blaNDM_4990-MT721963.

blaNDM_1756-MT721964.

blaNDM_4301-MT721965.

blaNDM_1581-MT721966.

blaKPC_4990-MT721967.

blaKPC_4301-MT721968.

blaKPC_1581-MT721969.

blaKPC_1411-MT721970.

blaKPC_1756-MT665969.

References

  1. Solgi H, Badmasti F, Aminzadeh Z, Giske CG, Pourahmad M, Vaziri F, et al. Molecular characterization of intestinal carriage of carbapenem-resistant Enterobacteriaceae among inpatients at two Iranian university hospitals: first report of co-production of bla NDM-7 and bla OXA-48. Eur J Clin Microbiol Infect Dis. 2017;36(11):2127–35.

    Article  CAS  Google Scholar 

  2. Kilic A, Baysallar M. The first Klebsiella pneumoniae isolate co-producing OXA-48 and NDM-1 in Turkey. Ann Lab Med. 2015;35(3):382–3.

    Article  CAS  Google Scholar 

  3. Seiffert SN, Marschall J, Perreten V, Carattoli A, Furrer H, Endimiani A. Emergence of Klebsiella pneumoniae co-producing NDM-1, OXA-48, CTX-M-15, CMY-16, QnrA and ArmA in Switzerland. Int J Antimicrob Agents. 2014;44(3):260–2.

    Article  CAS  Google Scholar 

  4. Xie L, Dou Y, Zhou K, Chen Y, Han L, Guo X, et al. Coexistence of blaOXA-48 and truncated blaNDM-1 on different plasmids in a Klebsiella pneumoniae isolate in China. Front Microbiol. 2017;8:133.

    PubMed  PubMed Central  Google Scholar 

  5. Remya P, Shanthi M, Sekar U. Prevalence and clonal relatedness of NDM and OXA-48-producing Klebsiella pneumoniae in a tertiary care hospital in South India. J Lab Physicians. 2019;11(4):312–6.

    Article  CAS  Google Scholar 

  6. Miao M, Wen H, Xu P, Niu S, Lv J, Xie X, et al. Genetic diversity of carbapenem-resistant enterobacteriaceae (CRE) clinical isolates from a tertiary hospital in Eastern China. Front Microbiol. 2018;9:3341.

    Article  Google Scholar 

  7. Kumarasamy KK, Toleman MA, Walsh TR, Bagaria J, Butt F, Balakrishnan R, et al. Emergence of a new antibiotic resistance mechanism in India, Pakistan, and the UK: a molecular, biological, and epidemiological study. Lancet Infect Dis. 2010;10(9):597–602.

    Article  CAS  Google Scholar 

  8. Yan J, Pu S, Jia X, Xu X, Yang S, Shi J, et al. Multidrug resistance mechanisms of carbapenem resistant Klebsiella pneumoniae strains isolated in Chongqing, China. Ann Lab Med. 2017;37(5):398–407.

    Article  CAS  Google Scholar 

  9. Wei D-D, Wan L-G, Liu Y. Draft genome sequence of an NDM-1- and KPC-2-coproducing hypervirulent carbapenem-resistant Klebsiella pneumoniae strain Isolated from burn wound infections. Genome Announc. 2018. https://0-doi-org.brum.beds.ac.uk/10.1128/genomeA.00192-18.

    Article  PubMed  PubMed Central  Google Scholar 

  10. Wang J, Yuan M, Chen H, Chen X, Jia Y, Zhu X, et al. First report of Klebsiella oxytoca strain Simultaneously producing NDM-1, IMP-4, and KPC-2 carbapenemases. Antimicrob Agents Chemother. 2017. https://0-doi-org.brum.beds.ac.uk/10.1128/AAC.00877-17.

    Article  PubMed  PubMed Central  Google Scholar 

  11. Wu W, Feng Y, Carattoli A, Zong Z. Characterization of an Enterobacter cloacae strain producing both KPC and NDM carbapenemases by whole-genome sequencing. Antimicrob Agents Chemother. 2015;59(10):6625–8.

    Article  CAS  Google Scholar 

  12. Quiles MG, Rocchetti TT, Fehlberg LC, Kusano EJU, Chebabo A, Pereira RMG, et al. Unusual association of NDM-1 with KPC-2 and armA among Brazilian Enterobacteriaceae isolates. Braz J Med Biol Res. 2015;48(2):174–7.

    Article  CAS  Google Scholar 

  13. Pereira PS, Borghi M, Albano RM, Lopes JCO, Silveira MC, Marques EA, et al. Coproduction of NDM-1 and KPC-2 in Enterobacter hormaechei from Brazil. Microb Drug Resist. 2015;21(2):234–6.

    Article  CAS  Google Scholar 

  14. Silva KE, Cayô R, Carvalhaes CG, Patussi Correia Sacchi F, Rodrigues-Costa F, Ramos Da Silva AC, et al. Coproduction of KPC-2 and IMP-10 in carbapenem-resistant Serratia marcescens isolates from an outbreak in a Brazilian teaching hospital. J Clin Microbiol. 2015;53(7):2324–8.

    Article  CAS  Google Scholar 

  15. Quezada-Aguiluz M, Lincopan N, Cerdeira L, Fuga B, Silva F, Barrera B, et al. Draft genome sequence of a multidrug-resistant KPC-2 and SRT-2 co-producing Serratia marcescens strain isolated from a hospitalised patient in Chile. J Glob Antimicrob Resist. 2020;21:1–2.

    Article  Google Scholar 

  16. Walsh TR, Toleman MA, Poirel L, Nordmann P. Metallo-β-lactamases: the quiet before the storm? Clin Microbiol Rev. 2005;18(2):306–25.

    Article  CAS  Google Scholar 

  17. Rozales FP, Ribeiro VB, Magagnin CM, Pagano M, Lutz L, Falci DR, et al. Emergence of NDM-1-producing Enterobacteriaceae in Porto Alegre, Brazil. Int J Infect Dis. 2014;25:79–81.

    Article  Google Scholar 

  18. Centro de Informações Estratégicas em Vigilância em Saúde - CIEVS - SP | Secretaria Municipal da Saúde | Prefeitura da Cidade de São Paulo. https://www.prefeitura.sp.gov.br/cidade/secretarias/saude/vigilancia_em_saude/index.php?p=236957.

  19. Carvalho-Assef APD, Pereira PS, Albano RM, Beriao GC, Chagas TPG, Timm LN, et al. Isolation of NDM-producing Providencia rettgeri in Brazil. J Antimicrob Chemother. 2013;68(12):2956–7.

    Article  Google Scholar 

  20. Matuschek E, Åhman J, Webster C, Kahlmeter G. Antimicrobial susceptibility testing of colistin—evaluation of seven commercial MIC products against standard broth microdilution for Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, and Acinetobacter spp. Clin Microbiol Infect. 2018;24(8):865–70.

    Article  CAS  Google Scholar 

  21. Dolinsky AL. M100 performance standards for antimicrobial susceptibility testing. J Serv Mark. 2017;8:27–39.

    Article  Google Scholar 

  22. Chen Y, Zhou Z, Jiang Y, Yu Y. Emergence of NDM-1-producing Acinetobacter baumannii in China. J Antimicrob Chemother. 2011;66(6):1255–9.

    Article  CAS  Google Scholar 

  23. Rizek C, Fu L, dos Santos LC, Leite G, Ramos J, Rossi F, et al. Characterization of carbapenem-resistant Pseudomonas aeruginosa clinical isolates, carrying multiple genes coding for this antibiotic resistance. Ann Clin Microbiol Antimicrob. 2014;13(1):4–8.

    Article  Google Scholar 

  24. Bradford PA, Bratu S, Urban C, Visalli M, Mariano N, Landman D, et al. Emergence of carbapenem-resistant Klebsiella species possessing the class A carbapenem-hydrolyzing KPC-2 and inhibitor-resistant TEM-30 beta-lactamases in New York City. Clin Infect Dis. 2004;39(1):55–60.

    Article  CAS  Google Scholar 

  25. Galens K, Orvis J, Daugherty S, Creasy HH, Angiuoli S, White O, et al. The IGS standard operating procedure for automated prokaryotic annotation. Stand Genomic Sci. 2011;4(2):244–51.

    Article  CAS  Google Scholar 

  26. Zerbino DR. Using the velvet de novo assembler for short-read sequencing technologies. Curr Protoc Bioinformatics. 2010. https://0-doi-org.brum.beds.ac.uk/10.1002/0471250953.bi1105s31.

    Article  PubMed  PubMed Central  Google Scholar 

  27. Zerbino DR, Birney E. Velvet: algorithms for de novo short read assembly using de Bruijn graphs. Genome Res. 2008;18(5):821–9.

    Article  CAS  Google Scholar 

  28. Larsen MV, Cosentino S, Rasmussen S, Friis C, Hasman H, Marvig RL, et al. Multilocus sequence typing of total-genome-sequenced bacteria. J Clin Microbiol. 2012;50(4):1355–61.

    Article  CAS  Google Scholar 

  29. Migliavacca R, Docquier J-D, Mugnaioli C, Amicosante G, Daturi R, Lee K, et al. Simple microdilution test for detection of metallo-beta-lactamase production in Pseudomonas aeruginosa. J Clin Microbiol. 2002;40(11):4388–90.

    Article  CAS  Google Scholar 

  30. Munoz-Price LS, Poirel L, Bonomo RA, Schwaber MJ, Daikos GL, Cormican M, et al. Clinical epidemiology of the global expansion of Klebsiella pneumoniae carbapenemases. Lancet Infect Dis. 2013;13(9):785–96.

    Article  Google Scholar 

  31. Kazi M, Shetty A, Rodrigues C. The carbapenemase menace: do dual mechanisms code for more resistance? Infect Control Hosp Epidemiol. 2015;36(1):116–7.

    Article  Google Scholar 

  32. Jia X, Dai W, Ma W, Yan J, He J, Li S, et al. Carbapenem-resistant E. cloacae in Southwest China: Molecular analysis of resistance and risk factors for infections caused by NDM-1-producers. Front Microbiol. 2018;9:1–11.

    Article  Google Scholar 

  33. Oliveira S, Moura RA, Silva KC, Pavez M, Mcculloch JA, Dropa M, et al. Isolation of kPC-2-producing klebsiella pneumoniae strains belonging to the high-risk multiresistant clonal complex 11 (ST437 and ST340) in urban rivers. J Antimicrob Chemother. 2014;69(3):849–52.

    Article  CAS  Google Scholar 

  34. Cuthbertson L, Kimber MS, Whitfield C. Substrate binding by a bacterial ABC transporter involved in polysaccharide export. Proc Natl Acad Sci USA. 2007;104(49):19529–34.

    Article  CAS  Google Scholar 

  35. Davidson AL, Dassa E, Orelle C, Chen J. Structure, function, and evolution of bacterial ATP-binding cassette systems. Microbiol Mol Biol Rev. 2008;72(2):317–64.

    Article  CAS  Google Scholar 

Download references

Acknowledgements

To all the patients and physicians involved as well as to the microbiology laboratory team.

Funding

No external funding was required. The study was performed with internal grants from the Medical Investigation laboratory (LIM-49).

Author information

Authors and Affiliations

  1. Infectious Diseases Division, Hospital das Clínicas da Universidade de São Paulo, São Paulo, Brazil

    Taniela Bes, Lauro Perdigão-Neto, Hermes Higashino, Thais Guimaraes, Anna S. Levin & Silvia Costa

  2. Institute of Tropical Medicine of the University of São Paulo, Avenida Dr. Enéas Carvalho de Aguiar, 470; LIM 49, São Paulo, CEP 05403-000, Brazil

    Taniela Bes, Debora Nagano, Roberta Martins, Ana Paula Marchi, Lauro Perdigão-Neto, Gladys Prado, Anna S. Levin & Silvia Costa

  3. Infection Control, Hospital das Clínicas Faculdade de Medicina da Universidade de Sao Paulo, Sao Paulo, Brazil

    Lauro Perdigão-Neto, Thais Guimaraes, Anna S. Levin & Silvia Costa

Authors
  1. Taniela Bes
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Debora Nagano
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Roberta Martins
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Ana Paula Marchi
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. Lauro Perdigão-Neto
    View author publications

    You can also search for this author in PubMed Google Scholar

  6. Hermes Higashino
    View author publications

    You can also search for this author in PubMed Google Scholar

  7. Gladys Prado
    View author publications

    You can also search for this author in PubMed Google Scholar

  8. Thais Guimaraes
    View author publications

    You can also search for this author in PubMed Google Scholar

  9. Anna S. Levin
    View author publications

    You can also search for this author in PubMed Google Scholar

  10. Silvia Costa
    View author publications

    You can also search for this author in PubMed Google Scholar

Contributions

TB wrote the main manuscript and the genotypic and phenotypic analyses. DN worked on phenotypic and genotypic analyses, as well as with the whole genome sequencing analyses. RM worked with the whole genome sequencing analyses. AM worked phenotypic and genotypic analyses. HH, GP, and TG were the infectious diseases attendants who cared for the patients clinically. LP-N, AL, and SC were the main reviewers. All authors have read and approved the final manuscript.

Corresponding author

Correspondence to Taniela Bes.

Ethics declarations

Ethics approval and consent to participate

The isolates from this study belong to the Microbiology Laboratory biobank and were involved in previous studies when informed consent term was obtained. This is a retrospective study, and all methods were performed in accordance with the guidelines and regulations approved by the Ethics Committee of Hospital das Clinicas of University of São Paulo, Brazil (approval reference numbers 1.310.231, 2.158.859, and 2.452.282).

Consent for publication

As the previous item.

Competing interests

The authors certify that they have NO affiliations with or involvement in any organization or entity with any financial interest in the subject matter or materials discussed in this manuscript.

Additional information

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Rights and permissions

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Bes, T., Nagano, D., Martins, R. et al. Bloodstream Infections caused by Klebsiella pneumoniae and Serratia marcescens isolates co-harboring NDM-1 and KPC-2. Ann Clin Microbiol Antimicrob 20, 57 (2021). https://0-doi-org.brum.beds.ac.uk/10.1186/s12941-021-00464-5

Download citation

  • Received:

  • Accepted:

  • Published:

  • DOI: https://0-doi-org.brum.beds.ac.uk/10.1186/s12941-021-00464-5

Keywords

Annals of Clinical Microbiology and Antimicrobials

ISSN: 1476-0711

Contact us