[Screening of blood donors for anti-HIV-1].

Repeatedly reactive results (also with reproducibility from donation to donation) are found in normal blood donor screening. They are obviously not HIV-1- (and/or HIV-2) specific. In some cases it cannot be clarified if we have to face a seroconversion. The cause of some antibodies (e.g. isolated p17 and/or p24 and/or p55) is not yet known. Therefore we cannot decide whether these results could be neglected or have to be considered a serious risk of transfusion associated infection.