TABLE 4.

Detection limit of HBsAg assays for PEI, WHO, and SFTS standards and the BBI 806 sensitivity panel

Standard or panel	Units	Detection limit of assay
		IMMULITE HBsAg	IMMULITE 2000 HBsAg	Elecsys HBsAg	Auszyme (B)	IMx HBsAg
Standards
PEI ad	PEIUa/ml	0.075	0.075	0.014	0.005	0.033
PEI ay	PEIU/ml	0.05	0.05	0.017	0.005	0.055
WHO subtype ad (NIBSC code 80/549)	IU/ml	0.1	0.1	0.0125	0.156	NDa
SFTS	pg/ml	0.12	0.25	0.12	ND	ND
Panels
BBI 806 subtype ad	PEIU/ml	0.06	0.03	0.02	0.31	ND
BBI 806 subtype ay	PEIU/ml	0.03	0.02	0.02	0.21	ND

^aND, not determined.