TABLE 2.

Mean results achieved with each quantitative PCR method using the second highest concentration of standard from each manufacturer^a

Standard	Mean (SD) (log10 IU/ml) for:
	Bio-Rad	RainDance	Altona	Abbott	Qiagen
AcroMetrix	3.13 (0.16)	2.95 (0.10)	3.63 (0.13)	3.39 (0.12)	3.08 (0.03)
SeraCare	3.96 (0.06)	3.77 (0.08)	4.13 (0.13)	3.78 (0.09)	3.89 (0.04)
ZeptoMetrix	2.65 (0.15)	2.52 (0.24)	3.10 (0.04)	2.77 (0.17)	2.63 (0.10)

^aThe second highest concentrations were 3.48 log₁₀ IU/ml for AcroMetrix and 3.70 log₁₀ IU/ml for ZeptoMetrix and SeraCare. Qiagen was compared against 3.71 log₁₀ copies/ml for AcroMetrix, 3.00 log₁₀ copies/ml for ZeptoMetrix, and 3.70 log₁₀ copies/ml SeraCare.