Healthcare-associated bloodstream infections in critically ill patients: descriptive cross-sectional database study evaluating concordance with clinical site isolates

Annals of Intensive Care

Table 3 Types and species of organisms isolated in all positive blood cultures, in CLBSI and in primary ICU-BSI

Organism isolated	All isolates (n=537)	CLBSI (n=32^a)	Primary ICU-BSI (n=73)
Gram-positive	333 (62.0)	10 (1.9)	20 (27.4)
Staphylococcus species (CoNS)	246 (45.8)	6 (1.1)	-
Other contaminant species	26 (4.8)	-	-
Vancomycin-sensitive Enterococcus	31 (5.8)	2 (0.4)	12 (16.4)
Methicillin-sensitive S. aureus	13 (2.4)	1 (0.2)	2 (2.7)
Vancomycin-resistant Enterococcus	8 (1.5)	1 (0.2)	4 (5.5)
Streptococcus other species	4 (0.7)	-	2 (2.7)
Methicillin-resistant S. aureus	1 (0.2)	-	-
Streptococcus pneumoniae	1 (0.2)	-	-
Unidentified probable contaminant	3 (0.6)	-	-
Gram-negative	174 (32.4)	13 (2.4)	45 (61.6)
Escherichia coli	32 (5.6)	1 (0.2)	7 (9.6)
Pseudomonas aeruginosa	43 (8.0)	6 (1.1)	6 (8.2)
Other	35(6.5)^b	1 (0.2)^c	13 (17.8)
Klebsiella species	27 (5.0)	4 (0.7)	10 (13.7)
Serratia species	18 (3.4)	-	5 (6.8)
Enterobacter species	19 (3.5)	1 (0.2)	4 (5.5)
Fungi	30 (5.6)	9 (1.7)	8 (11.0)
Candida species	30 (5.6)	9 (1.7)	8 (11.0)

^aDenominator for calculating proportions was the total number of positive blood culture isolates (n =537). ^bIncludes Proteus, Bacteroides, Citrobacter, Morganella and Stenotrophomonas species. ^cProteus mirabilis.