Table 2.

Comparison of blood culture isolates from young infants born in and out of hospital

	Hospital born n= 2,189		Outborn n= 4,467		Difference in percentages
Organism	No. of isolates	Percentage (95% C.I )	No. of isolates	Percentage (95% C.I )	p value
S. aureus	18	0.8 (0.5, 1.3)	55	1.2 (0.9,1.6)	0.17
Streptococcus Group A	4	0.2 (0.05, 0.5)	39	0.9 (0.6,1.2)	<0.01
Streptococcus Group B	20	0.9 (0.6, 1.4)	32	0.7 (0.5, 1)	0.38
Streptococcus pneumoniae	5	0.2 (0.1, 0.5)	33	0.7 (0.5, 1)	<0.01
Other Gram positive	24	1.1 (0.7, 1.6)	48	1.1 (0.8, 1.4)	0.9
All Gram positive	71	3.2 (2.5, 4.1)	207	4.6 (4.0, 5.3)	0.08
Acinetobacter spp	17	0.8 (0.5, 1.2)	48	1.1 (0.8, 1.4)	0.29
Aeromonas spp	-	-	21	0.5 (0.3, 0.7)	<0.001
Enterobacter spp	8	0.4 (0.2, 0.7)	32	0.7 (0.5, 1.0)	0.09
E. coli	17	0.8 (0.5, 1.2)	41	0.9 (0.7, 1.2)	0.67
Klebsiella spp.	12	0.5 (0.3, 1.0)	57	1.3 (1, 1.7)	<0.01
Pseudomonas aeruginosa	8	0.4 (0.2, 0.7)	9	0.2 (0.1, 0.4)	0.3
H. influenzae	1	0.05 (0.01, 0.3)	14	0.3 (0.2, 0.5)	0.03
Salmonella spp	-	-	22	0.5 (0.3, 0.7)	<0.001
Vibrio spp.	-	-	8	0.2 (0.1, 0.4)	0.05
Other Gram negative	1	0.05 (0.01, 0.3)	15	0.3 (0.2, 0.6)	0.03
All Gram negative	64	3 (2.3, 3.7)	267	6 (5.3, 6.7)	<0.001
Total	135	6.2 (5.2, 7.3)	474	10.6 (9.7, 11.6)	<0.001