35.370 blood samples, collected from woluntary blood donors by the Blood Transfusion Services of the Turkish Red Crescent Society in one year, were tested by the systematic screening CEP Method for the "Au" antigen, according to the recommendations of WHO. The number and percentage of positive "Au" antigen cases are shown in Table 1. No significant difference could be detected when the relationship of "Au" antigen to months was considered. This can be seen in Table 2.