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Table 3 Distribution of microorganisms recovered at the time of the first sampling in 107 positive samples in the groups exposed and unexposed to antibiotics

From: Impact of prior antibiotics on infected pancreatic necrosis microbiology in ICU patients: a retrospective cohort study

  Total patients with confirmed IPN n = 48 Species n = 162 (100%) Exposed group n = 30 species n = 97 (60%) Unexposed group n = 18 species n =65 (40%) P value
Bacteria  
Gram-negative enterobacteriaceae 82 (50.6) 49 (50.5) 33 (50.5) 1
 Escherichia coli 36 (22.2) 16 20  
 Klebsiella pneumoniae 11 (6.8) 4 7  
 Klebsiella oxytoca 10 (6.2) 9 1  
 Enterobacter cloacae complex 14 (8.6) 13 1  
 Citrobacter freundii 2 (1.3) 0 2  
 Morganella morganii 3 (1.8) 3 0  
 Proteus mirabilis 3 (1.8) 2 1  
 Enterobacter aerogenes 2 (1.3) 1 1  
 Hafnia alvei 1 (0.6) 1 0  
Gram-negative aerobic and anaerobic bacteria 13 (8.1) 11 (11) 2 (0.3) 0.13
 Pseudomonas aeruginosa 10 (6.2) 9 1  
 Acinetobacter baumannii 1 (0.6) 1   
 Stenotrophomonas maltophilia 2 (1.3) 1 1  
Gram-negative anaerobic bacteria 23 (14.2) 8 (8) 15 (23) 0.03
Bacteroides fragilis 10 (6.2) 2 8  
 Prevotella spp. 10 (6.2) 5 5  
 Other anaerobes 3 (1.8) 1 2  
Gram-positive bacteria 38 (23.4) 22 (23) 14 (21) 0.85
 Enterococcus faecalis 18 (11.1) 9 7  
 Enterococcus faecium 4 (2.4) 3 1  
 Streptococcus 6 (3.7) 4 2  
 Staphylococcus aureus 7 (4.4) 5 2  
 Staphylococcus epidermidis 3 (1.8) 1 2  
Fungi  
 Candida 6 (3.7) 5 (0.5) 1 (0.2) 0.4
  C. albicans 4 (2.4) 3 1  
  C. glabrata 2 (1.3) 2 0  
  1. Italic values indicate significance of P value (P < 0.05)