Table 2.

Testing of sample from donor at least six months after possible transmission of infection

Tests on donor's subsequent donation	Interpretation of result	No of donors
Hepatitis B virus
Anti-hepatitis B core (Abbott IMx)	If negative, donor excluded as source of infection	230
	If positive, sample tested for virus DNA by polymerase chain reaction and for anti-hepatitis B surface (as negative for DNA virus and positive for anti-hepatitis B surface this was donor excluded)	1
Hepatitis C virus
Anti-hepatitis C virus (EIA-Pasteur)	If negative, donor excluded	36