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Article

Characteristics of carbapenemase-producing Klebsiella pneumoniae as a cause of neonatal infection in Shandong, China

  • Authors:
    • Yan Jin
    • Xiaofei Song
    • Yigang Liu
    • Yong Wang
    • Bingchang Zhang
    • Hui Fan
    • Chunhong Shao
  • View Affiliations / Copyright

    Affiliations: Department of Microbiology, Clinical Laboratory, Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, P.R. China, Department of Immunology, Clinical Laboratory, Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, P.R. China
  • Pages: 1117-1126
    |
    Published online on: January 20, 2017
       https://doi.org/10.3892/etm.2017.4070
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Abstract

The goal of the present study was to examine the characteristics of carbapenem-resistant Klebsiella pneumoniae as a cause of neonatal infection. A total of 37 carbapenem‑resistant Klebsiella pneumoniae‑positive newborns hospitalized in Shandong Provincial Hospital, China between April 2011 and October 2013 were examined. Antibiotic susceptibility testing was performed using the agar dilution method and the Etest. Resistance genes were assessed by polymerase chain reaction (PCR) and sequencing. Pulsed‑field gel electrophoresis (PFGE) and multi‑locus sequence typing (MLST) were used to determine the genotypes and homology of these isolates. Plasmids were analyzed by PFGE and conjugation experiments. The outer membrane proteins were examined by PCR and SDS‑PAGE. All of the isolates were revealed to be resistant to the third and fourth generation cephalosporins and piperacillin‑tazobactam. Tigecycline, colistin, levofloxacin and amikacin were successful against all of the isolates. The antibiotic resistance rates of aztreonam, gentamicin, trimethoprim-sulfamethoxazole and fosfomycin were 13.51, 48.64, 78.38 and 86.49%, respectively. Of the 37 cases, 25 isolates (67.57%) were blaNDM‑1 positive, 13 isolates (35.14%) were blaIMP‑4 positive and 1 isolate (2.70%) was blaIMP‑8 positive. Two isolates carried both blaNDM‑1 and blaIMP‑4. The isolate carrying 2‑4 plasmids and blaNDM‑1 and blaIMP‑4 was transferable between strains. SDS‑PAGE data indicated that outer membrane proteins remained present. PFGE revealed 7 distinct clusters, and MLST reported the presence of ST20, ST17, ST54, ST705 and ST290 sequences, which indicated that there was clone and plasmid spread between newborns. The main resistance mechanism of carbapenem-resistant Klebsiella pneumoniae was that the isolates expressed the carbapenemase resistance of blaNDM‑1 and blaIMP‑4 genes. The current study indicates that early detection of these genes may be helpful in infection prevention and control.
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Copy and paste a formatted citation
Spandidos Publications style
Jin Y, Song X, Liu Y, Wang Y, Zhang B, Fan H and Shao C: Characteristics of carbapenemase-producing Klebsiella pneumoniae as a cause of neonatal infection in Shandong, China. Exp Ther Med 13: 1117-1126, 2017.
APA
Jin, Y., Song, X., Liu, Y., Wang, Y., Zhang, B., Fan, H., & Shao, C. (2017). Characteristics of carbapenemase-producing Klebsiella pneumoniae as a cause of neonatal infection in Shandong, China. Experimental and Therapeutic Medicine, 13, 1117-1126. https://doi.org/10.3892/etm.2017.4070
MLA
Jin, Y., Song, X., Liu, Y., Wang, Y., Zhang, B., Fan, H., Shao, C."Characteristics of carbapenemase-producing Klebsiella pneumoniae as a cause of neonatal infection in Shandong, China". Experimental and Therapeutic Medicine 13.3 (2017): 1117-1126.
Chicago
Jin, Y., Song, X., Liu, Y., Wang, Y., Zhang, B., Fan, H., Shao, C."Characteristics of carbapenemase-producing Klebsiella pneumoniae as a cause of neonatal infection in Shandong, China". Experimental and Therapeutic Medicine 13, no. 3 (2017): 1117-1126. https://doi.org/10.3892/etm.2017.4070
Copy and paste a formatted citation
x
Spandidos Publications style
Jin Y, Song X, Liu Y, Wang Y, Zhang B, Fan H and Shao C: Characteristics of carbapenemase-producing Klebsiella pneumoniae as a cause of neonatal infection in Shandong, China. Exp Ther Med 13: 1117-1126, 2017.
APA
Jin, Y., Song, X., Liu, Y., Wang, Y., Zhang, B., Fan, H., & Shao, C. (2017). Characteristics of carbapenemase-producing Klebsiella pneumoniae as a cause of neonatal infection in Shandong, China. Experimental and Therapeutic Medicine, 13, 1117-1126. https://doi.org/10.3892/etm.2017.4070
MLA
Jin, Y., Song, X., Liu, Y., Wang, Y., Zhang, B., Fan, H., Shao, C."Characteristics of carbapenemase-producing Klebsiella pneumoniae as a cause of neonatal infection in Shandong, China". Experimental and Therapeutic Medicine 13.3 (2017): 1117-1126.
Chicago
Jin, Y., Song, X., Liu, Y., Wang, Y., Zhang, B., Fan, H., Shao, C."Characteristics of carbapenemase-producing Klebsiella pneumoniae as a cause of neonatal infection in Shandong, China". Experimental and Therapeutic Medicine 13, no. 3 (2017): 1117-1126. https://doi.org/10.3892/etm.2017.4070
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