TABLE 1.

The 20 most common organisms isolated from ICUs in Canada

RankingOrganismaNo. of isolates% of total
1Staphylococcus aureus (MSSA)68716.4
2Escherichia coli53612.8
3Pseudomonas aeruginosa41910.0
4Haemophilus influenzae3297.9
5CoNS/Staphylococcus epidermidis2736.5
6Enterococcus spp.2556.1
7Streptococcus pneumoniae2445.8
8Klebsiella pneumoniae2245.4
9Staphylococcus aureus (MRSA)1974.7
10Enterobacter cloacae1643.9
11Stenotrophomonas maltophilia1082.6
12Serratia marcescens1002.4
13Moraxella catarrhalis781.9
14Klebsiella oxytoca771.8
15Streptococcus pyogenes491.2
16Enterobacter aerogenes471.1
17Citrobacter freundii390.9
18Streptococcus agalactiae390.9
19Proteus mirabilis380.9
20Acinetobacter baumannii280.7
Otherb2496.0
Total4,180100.0
  • a CoNS, coagulase-negative staphylococci; MSSA, methicillin-sensitive Staphylococcus aureus; MRSA, methicillin-resistant Staphylococcus aureus.

  • b Includes Acinetobacter, Burkholderia, Bacillus, Citrobacter, Corynebacterium, Enterobacter, Haemophilus, Micrococcus, Morganella, Neisseria, Pseudomonas, Salmonella, Serratia, Staphylococcus, and Streptococcus spp.