TABLE 4.

Distribution of doripenem log₂ dilution differences between Etest and BMD reference methods

Organism group	No. of isolates								% agreement
	Total	With log2 dilution differencea:
		≤−3	−2	−1	0	1	2	≥3	Same	±1	±2
Enterobacteriaceae	100		1	7	28	57	7		28.0	92.0	100.0
Non-Enterobacteriaceae	100		1	27	45	19	6	2	45.0	91.0	98.0
P. aeruginosa	80		1	26	36	13	4		45.0	93.8	100.0
A. baumannii	20			1	9	6	2	2	45.0	80.0	90.0
Enterococcus spp.	49	1		8	26	13	1		53.1	95.9	98.0
Staphylococcus spp.	100		2	3	16	45	29	5	16.0	64.0	95.0
S. aureus	61				7	27	24	3	11.5	55.7	95.1
CoNSb	39		2	3	9	18	5	2	23.1	76.9	94.9
Streptococcus spp., not S. pneumoniae	60			4	30	20	5	1	50.0	90.0	98.3
Streptococcus spp., beta-hemolytic group	39				22	16		1	56.4	97.4	97.4
Streptococcus spp., viridans group	21			4	8	4	5		38.1	76.2	100.0
Streptococcus pneumoniae	103			6	78	19			75.7	100.0	100.0
Total	512	1	4	55	223	173	48	8	43.6	88.1	98.2

^aNegative number, Etest result was lower than BMD result. Positive number, Etest result was higher than the BMD result.

^bCoNS, coagulase-negative staphylococci.