Table 3.

Number of Main Organisms Causing First Intensive Care Unit–Acquired Bloodstream Infection by Year

Organism (n)	2007–2008	2008–2009	2009–2010	2010–2011	2011–2012	2012–2013	2013–2014	2014–2015	2015–2016
MRSA	160	151	83	63	54	33	27	31	15
Staphylococcus aureus (not MRSA)	312	313	321	260	205	249	220	268	221
VRE	…	…	9	11	31	29	20	19	35
Enterococcus spp. (not VRE)	117	169	154	158	144	134	144	162	163
Candida spp.	80	170	156	144	110	112	93	114	74
Pseudomonas spp.a	126	151	133	139	80	61	59	60	80
Acinetobacter spp.	21	42	27	30	19	19	16	9	22
Enterobacter spp.	61	117	104	91	65	60	58	59	68
Klebsiella spp.	81	135	116	119	102	97	125	114	138
Serratia spp.	16	26	33	36	16	18	24	19	26
Escherichia coli	127	200	153	170	168	136	156	169	183
Other organismsb	223	183	127	104	64	79	87	97	101
Total	1324	1657	1416	1325	1058	1027	1029	1121	1126

Abbreviations: MRSA, methicillin-resistant Staphylococcus aureus; spp., species; VRE, vancomycin-resistant Enterococcus.

^aUnits were not asked to distinguish Pseudomonas aeruginosa from Pseudomonas spp. The order of organism in this table (identical to the order in Supplementary Table 1) is the order units were asked to prioritize the recording of main organisms in the first intensive care unit–acquired bloodstream infection. Hence, for polymicrobial bloodstream infections, only the organism highest up in the table was recorded.

^bOther organisms are listed in Supplementary Table 2B.