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Table 5 Microbial isolation from positive endotracheal tube tip cultures

From: Biofilm formation on three different endotracheal tubes: a prospective clinical trial

Organism PVC tube (n = 14) SC tube (n = 13) NbMC tube (n = 22) All tubes (n = 49)
Gram-positive bacteria
Staphylococcus aureus 2 (11) 2 (13) 1 (3.7) 5 (8.2)
Enterococcus faecalis 3 (16)   2 (7.4) 5 (8.2)
Enterococcus faecium 1 (5.6) 1 (6.2)   2 (3.3)
Staphylococcus epidermidis   1 (6.3)   1 (1.6)
Gram-negative bacteria
Pseudomonas aeruginosa 1 (5.6)   3 (11) 4 (6.6)
Stenotrophomonas maltophilia    4 (15) 4 (6.6)
Klebsiella species   1 (6.2) 1 (3.7) 2 (3.3)
Chryseobacterium indologenes    2 (7.4) 2 (3.3)
Escherichia coli   1 (6.2)   1 (1.6)
Serratia marcescens 1 (5.6)    1 (1.6)
Acinetobacter species   1 (6.2)   1 (1.6)
Citrobacter freundii    1 (3.7) 1 (1.6)
Yeast
Candida spp. 9 (50) 9 (56) 13 (48) 31 (51)
Candida albicans 8 (44) 7 (44) 9 (33) 24 (39)
 Other yeasts 1 (5.6)    1 (1.6)
Total number of microorganisms cultured from ETTs 18 (100) 16 (100) 27 (100) 61 (100)
  1. Data are presented as number (percentage). Approximately 20% of all endotracheal tube tips were polymicrobial. Abbreviations: PVC polyvinyl-chloride, SC silicone-coated, NbMC noble-metal-coated