Table 3.
The distribution of the most isolated microorganisms according to the type of infection.
| Organism type | BSI | VAP | SSI | UTI | Other | Total | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| N | % | N | % | N | % | N | % | N | % | N | % | |
| Gram-negative bacteria | 349 | 32.2 | 190 | 17.6 | 100 | 9.2 | 83 | 7.6 | 10 | 0.9 | 732 | 67.5 |
| E. coli | 87 | 8.0 | 20 | 1.8 | 40 | 3.7 | 33 | 3.0 | 2 | 0.2 | 182 | 16.7 |
| P. aeruginosa | 65 | 6.0 | 66 | 6.1 | 18 | 1.6 | 19 | 1.7 | 3 | 0.3 | 171 | 15.7 |
| Pseudomonas spp. | 2 | 0.2 | 1 | 0.1 | 1 | 0.1 | – | – | – | – | 4 | 0.4 |
| A. baumannii | 55 | 5.0 | 51 | 4.7 | 9 | 0.8 | 5 | 0.5 | 3 | 0.3 | 123 | 11.3 |
| K. pneumoniae | 70 | 6.5 | 21 | 1.9 | 11 | 1.0 | 18 | 1.6 | 1 | 0.1 | 121 | 11.1 |
| Enterobacter cloaceae | 14 | 1.3 | 4 | 0.4 | 8 | 0.7 | – | – | – | – | 26 | 2.4 |
| Enterobacter aerogenes | 5 | 0.5 | 7 | 0.6 | 1 | 0.1 | – | – | – | – | 13 | 1.2 |
| Enterobacter spp. | 3 | 0.3 | 1 | 0.1 | 1 | 0.1 | 1 | 0.1 | – | – | 6 | 0.6 |
| Stenotrophomonas maltophilia | 15 | 1.4 | 7 | 0.6 | 2 | 0.2 | 1 | 0.1 | – | – | 25 | 2.3 |
| Klebsiella oxytoca | 8 | 0.7 | – | – | – | – | – | – | 8 | 0.7 | ||
| Proteus mirabilis | 7 | 0.6 | 2 | 0.2 | 4 | 0.4 | 4 | 0.4 | – | – | 17 | 1.6 |
| Serratia marcescens | 6 | 0.5 | 4 | 0.4 | 3 | 0.3 | 1 | 0.1 | 1 | 0.1 | 15 | 1.4 |
| Burkholderia cepacia | 2 | 0.2 | 2 | 0.2 | 1 | 0.1 | 1 | 0.1 | – | – | 6 | 0.6 |
| Achromobacter denitrificans | – | – | 1 | 0.1 | – | – | – | – | – | – | 1 | 0.1 |
| Aeromonas sobria | 1 | 0.1 | – | – | – | – | – | – | – | – | 1 | 0.1 |
| Chryseobacterium indologenes | 1 | 0.1 | – | – | – | – | – | – | – | – | 1 | 0.1 |
| Citrobacter koseri | 1 | 0.1 | – | – | – | – | – | – | – | – | 1 | 0.1 |
| Delftia acidovorans | 1 | 0.1 | – | – | – | – | – | – | – | – | 1 | 0.1 |
| Moraxella catarrhalis | – | – | 1 | 0.1 | – | – | – | – | – | – | 1 | 0.1 |
| Morganella spp. | 1 | 0.1 | – | – | – | – | – | – | – | – | 1 | 0.1 |
| Ochrobactrum anthropi | 1 | 0.1 | – | – | – | – | – | – | – | – | 1 | 0.1 |
| Proteus vulgaris | – | – | – | – | 1 | 0.1 | – | – | – | – | 1 | 0.1 |
| Ralstonia pickettii | 1 | 0.1 | – | – | – | – | – | – | – | – | 1 | 0.1 |
| Raoultella planticola | 1 | 0.1 | – | – | – | – | – | – | – | – | 1 | 0.1 |
| Sfingomonas paucimobilus | – | – | 1 | 0.1 | – | – | – | – | – | – | 1 | 0.1 |
| Nonfermentative Gram-negative bacilli | 2 | 0.2 | 2 | 0.2 | – | – | – | – | – | – | 4 | 0.4 |
| Gram-positive bacteria | 184 | 16.9 | 29 | 2.7 | 48 | 4.4 | 8 | 0.8 | 2 | 0.2 | 271 | 24.9 |
| Coagulase-negative Staphylococci | 97 | 8.9 | – | – | 12 | 1.1 | – | – | – | – | 109 | 10.0 |
| S. aureus | 23 | 2.1 | 23 | 2.1 | 16 | 1.5 | – | – | 1 | 0.1 | 63 | 5.8 |
| E. faecalis | 31 | 2.9 | – | – | 9 | 0.8 | 1 | 0.1 | – | – | 41 | 3.8 |
| E. faecium | 29 | 2.6 | 1 | 0.1 | 4 | 0.4 | 1 | 0.1 | 1 | 0.1 | 36 | 3.3 |
| E. gallinorum | 1 | 0.1 | – | – | – | – | – | – | – | – | 1 | 0.1 |
| Enterococcus spp. | 3 | 0.3 | 1 | 0.1 | 6 | 0.6 | 6 | 0.6 | – | – | 16 | 1.5 |
| Streptococus pneumoniae | – | – | 3 | 0.3 | – | – | – | – | – | – | 3 | 0.3 |
| Corynebacterium spp. | – | – | 1 | 0.1 | – | – | – | – | – | – | 1 | 0.1 |
| Actinomyces | – | – | – | – | 1 | 0.1 | – | – | – | – | 1 | 0.1 |
| Yeast | ||||||||||||
| Candida | 67 | 6.2 | 2 | 0.2 | – | – | 13 | 1.2 | – | – | 82 | 7.6 |
| C. albicans | 25 | 2.3 | – | – | – | – | 4 | 0.4 | – | – | 29 | 2.7 |
| C. parapsilosis | 24 | 2.2 | – | – | – | – | 1 | 0.1 | – | – | 25 | 2.3 |
| C. glabrata | 5 | 0.5 | 1 | 0.1 | – | – | – | – | – | – | 6 | 0.6 |
| C. guilermondii | 2 | 0.2 | – | – | – | – | – | – | – | – | 2 | 0.2 |
| C. krusei | 3 | 0.3 | – | – | – | – | – | – | – | – | 3 | 0.3 |
| C. tropicalis | 1 | 0.1 | 1 | 0.1 | – | – | 2 | 0.2 | – | – | 4 | 0.4 |
| Nonalbicans candida spp. | 7 | 0.6 | – | – | – | – | 6 | 0.5 | – | – | 13 | 1.2 |
| Total | 600 | 55.3 | 221 | 20.4 | 148 | 13.7 | 104 | 9.5 | 12 | 1.1 | 1085 | 100 |
BSI: bloodstream infection; VAP: ventilator-associated pneumonia; SSI: surgical site infection; UTI: urinary tract infection.