TABLE 2.

The 10 most common organisms isolated by specimen site in ICUs in Canada

Specimen site and rankingOrganismaNo. of isolates% of total
Respiratory specimens (n = 2,292) (54.8%)
    1S. aureus (MSSA)46720.5
    2H. influenzae32314.1
    3P. aeruginosa28912.6
    4S. pneumoniae1988.6
    5E. coli1225.3
    6K. pneumoniae1225.3
    7S. aureus (MRSA)1185.1
    8E. cloacae1074.7
    9S. maltophilia954.1
    10M. catarrhalis783.4
Otherb37316.3
    Total2,292100.0
Blood specimens (n = 738) (17.7%)
    1CoNS/S. epidermidis16622.5
    2S. aureus (MSSA)8711.8
    3Enterococcus spp.7410.0
    4E. coli739.9
    5S. aureus (MRSA)496.6
    6S. pneumoniae405.4
    7P. aeruginosa334.5
    8K. pneumoniae263.5
    9E. cloacae243.3
    10S. pyogenes172.3
Otherb14920.2
    Total738100.0
Wound/tissue specimens (n = 581) (13.9%)
    1S. aureus (MSSA)11319.5
    2CoNS/S. epidermidis8514.6
    3Enterococcus spp.7212.4
    4E. coli5810.0
    5P. aeruginosa529.0
    6S. aureus (MRSA)274.6
    7K. pneumoniae254.3
    8S. pyogenes244.1
    9E. cloacae172.9
    10S. marcescens152.6
Otherb9316.0
    Total581100.0
Urine specimens (n = 569) (13.6%)
    1E. coli28349.7
    2Enterococcus spp.7813.7
    3K. pneumoniae519.0
    4P. aeruginosa457.9
    5S. aureus (MSSA)203.5
    6E. cloacae162.8
    7CoNS/S. epidermidis142.5
    8C. freundii111.9
    9K. oxytoca81.4
    10P. mirabilis81.4
Otherb356.2
Total569100.0
  • a CoNS, coagulase-negative staphylococci.

  • b See Table 1, footnote b.