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Table 3 Pathogens causing surgical site infections following coronary artery bypass graft procedures, 2003-2012

From: Surgical site infections following coronary artery bypass graft procedures: 10 years of surveillance data

Pathogen All surgical site infections Complex sternal site infections
  n % n %
Total number of infections 1,702   187  
Number of infections with pathogens isolated 732   152  
Gram-positive - subtotal 388 53.0 107 70.4
  Methicillin-sensitive Staphylococcus aureus 207 28.3 50 32.9
  Methicillin-resistant Staphylococcus aureus 107 14.6 20 13.2
  Coagulase-negative Staphylococci 46 6.3 30 19.7
  Enterococcus spp. 11 1.5 5 3.3
  Streptococcus spp. 10 1.4 1 0.7
  Bacillus spp. 3 0.4 - -
  Peptostreptococcus spp. 3 0.4 - -
  Corynebacterium spp. 1 0.1 1 0.7
Gram-negative - subtotal 323 44.1 41 27.0
  Pseudomonas aeruginosa 134 18.3 5 3.3
  Enterobacter spp. 49 6.7 9 5.9
  Serratia marcescens 38 5.2 9 5.9
  Escherichia coli 23 3.1 3 2.0
  Klebsiella spp. 21 2.9 8 5.3
  Proteus mirabilis 13 1.8 2 1.3
  Morganella morganii 11 1.5 1 0.7
  Other Pseudomonas spp. 14 1.9 - -
  Citrobacter spp. 8 1.1 2 1.3
  Acinetobacter baumannii 5 0.7 1 0.7
  Other Gram-negative bacteria* 7 1.0 1# 0.7
Fungi - subtotal 21 2.9 4 2.6
  Candida albicans 20 2.7 4 2.6
  Aspergillus spp. 1 0.1 - -
  1. *including Providencia stuartii, Stenotrophomonas maltophilia, Aeromonas spp., Bacteroides fragilis, and Hafnia alvei.
  2. # Hafnia alvei as the pathogen.