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Table 1 Microorganisms recovered from BSIs in ICU in the main recent studies

From: Treatment of bloodstream infections in ICUs

Author Marra 2011[23] Prowle 2011[4] Valles 2011[24] Corona 2010[25] Tabah 2012[12]
(countries) (Brazil) (Australia) (Spain, Argentina) (Europe, Australasia, South America, Asia) (Europe, South America, China, Canada)
Type of BSI (number of cases) HAB (1196) ICU-AB (330) CAB (343) HCAB (131) HAB (252) CAB (431) HAB (351) ICU-AB (915) HAB (279) ICU-AB (877) % MDROb
S. pneumoniae    21.4%    10.9% 1.4% 0.4% -- --  
S. aureus 12.8% 26.7% 10.3%a 13.8%a 9.6%a 22.3% 26.2% 23.6% 16.1% 8.4% 60%
CoNS 16.6% 24.3% 3.5% 6.2% 10.8% 16.5% 19.7% 29.6% 10% 12.7% --
Enterococcus spp. 5.5% 17% 1.5% 4.6% 8.4% 7.2% 9.1% 11.4% 10% 12.9% 43.5%
E. coli   Gram negative 28.2% 20.5% 26.9 18.5% 19% 9.7% 5.6% 19% 5.1% 66.7%
Enterobacter spp. 5.8% 2.3% 6.9% 3.6% 2.6% 4.8% 6.3% 7.2% 7.6% 50%
Klebsiella spp. 11.8% 4.1% 4.6% 6.0% 4.6% 8.6% 8.5% 8.2% 15.2% 90.9%
Serratia spp. 3.2%        1.8% 2.6% 69%
Proteus spp. 1.8%     3.3% 1.4% 1.5% 1.4% 1.7% 20%
P. aeruginosa 10% 1.8% 4.6% 6.4% 6% 10.3% 9.7% 10.4% 12.5% 60%
Acinetobacter spp. 11.8%     0.9% 5.4% 5.7% 7.5% 15.7% 95.2%
Anaerobes    3.2% 1.5% 1.6%     3.9% 0.7% 0
Candida spp. 5.8% 15.5% 1.5% 3.8% 8.4% 4.9% 10.5% 6.5% 7.5% 8.2% --
  1. Legend: HAB: hospital-acquired BSI, ICU-AB: ICU acquired BSI, HCAB: healthcare-associated BSI, MDRO : multi drug resistant organisms.
  2. a: MRSA represents 3% of CAB, 27.5% of HCAB and 54.1% of HAB.
  3. b: proportion of multidrug resistant organisms for both HAP and ICU-AB.