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Table 3 Bacteria isolated from peritoneal fluid in 100 episodes of postoperative peritonitis

From: Risk factors for multidrug resistant bacteria and optimization of empirical antibiotic therapy in postoperative peritonitis

Microorganisms Number of strains
n (%)
Monomicrobial
infection
Gram-positive bacteria 108 (40)  
   Enterococci 50 (19)  
E. faecium 11 (4)  
Other 39 (14) 1
   Streptococci 30 (11)  
   Staphylococci 28 (10)  
S. aureus 7 (3)  
Coagulase-negative staphylococci 21 (8) 3
Gram-negative bacteria 119 (44)  
   Enterobacteriaceae 101 (37)  
Escherichia coli 49 (18) 4
Enterobacter species 22 (8) 1
Klebsiella species 13 (5)  
Morganella morganii 7 (3) 1
Proteus species 5 (2)  
Citrobacter species 5 (2)  
   Pseudomonas aeruginosa 16 (6) 1
   Acinetobacter baumannii 2 (1)  
Miscellaneous 6 (2) 1
Anaerobes 36 (13)  
   Bacteroides species 20 (7)  
Total bacteria 269 (100) 12