Table 2.

Microbiology^a

	PRE (n = 54 organisms), No. (%)	POST (n = 45 organisms), No. (%)	POST-AS (n = 37 organisms), No. (%)	P Valueb
Gram positivec	27 (50)	24 (52)	21 (57)	.816
Coag.-negative Staphylococcus spp.	6 (11)	9 (20)	10 (27)	.148
Enterococcus faecalis	3 (5.6)	5 (11)	0	.103
Enterococcus faecium	3 (5.6)	0	0	.097
MRSA	2 (3.7)	1 (2.2)	0	.498
MSSA	4 (7.4)	5 (11)	3 (8.1)	.798
Streptococcus anginosus group	1 (1.9)	0	2 (5.4)	.246
Streptococcus pneumoniae	0	1 (2.2)	2 (5.4)	.226
Streptococcus viridans group	2 (3.7)	0	1 (2.7)	.445
Gram negatived	26 (48)	21 (47)	15 (41)	.762
Enterobacter cloacae complex	2 (3.7)	1 (2.2)	0	.498
Escherichia coli	17 (31)	8 (18)	8 (22)	.259
Klebsiella oxytoca	1 (1.9)	2 (4.4)	3 (8.1)	.361
Klebsiella pneumoniae	4 (7.4)	5 (11)	4 (11)	.786
Pseudomonas aeruginosa	0	3 (6.7)	0	.045
Yeast	1 (1.9)	0	1 (2.7)	.573
Polymicrobial	2 (3.7)	2 (4.4)	1 (2.7)e	.917

Abbreviations: BCID, multiplex polymerase chain reaction–based blood culture identification; MRSA, methicillin-resistant Staphylococcus aureus; MSSA, methicillin-susceptible Staphylococcus aureus; PRE, before BCID implementation; POST, after BCID implementation; POST-AS, BCID coupled with antimicrobial stewardship.

^aFinal blood culture identification.

^bKruskal-Wallis test (continuous variables) or chi-square test (categorical variables).

^cGram-positive organisms not listed: Enterococcus gallinarum, Enterococcus casseliflavus, Granulicatella adiacens, Listeria monocytogenes, Staphylococcus lugdunensis, Streptococcus group C (2), Streptococcus group G (2), Streptococcus mitis group (2), Streptococcus pyogenes.

^dGram-negative organisms not listed: Serratia marcescens, Citrobacter freundii, Pantoea agglomerans, Citrobacter Koseri.

^eThree organisms identified from blood culture.