ABSTRACT
<p><b>OBJECTIVE</b>To understand the characteristics of infections from blood donors with HBsAg⁻/HBV DNA⁺ in Xiamen area.</p><p><b>METHODS</b>Donors in Xiamen area were assayed by routine ELISA and those with negative results were tested by nucleic acid amplification testing (NAT). HBsAg⁻/HBV DNA⁺ samples were tested by quantitative detection of HBV DNA. Epidemiological analysis and following up examination were conducted in HBsAg⁻/HBV DNA⁺ donors.</p><p><b>RESULTS</b>Out of 130659 samples 113 were tested as HBsAg⁻/HBV DNA⁺ and with a rate of 0.09%. Among those, 62 samples were tested by quantitative detection of HBV DNA. All of the quantitative results were less than 1 × 10³ IU/ml and 93.5% (58/62) of which were less than 100 IU/ml. The possitive rate of HBsAg⁻/HBV DNA⁺ donors rose with ages. The possitive rate in male donors was higher than that in female and was lower in highly educated ones. Students and public servants had a lower positive rate.</p><p><b>CONCLUSION</b>The possitive rate of HBsAg⁻/HBV DNA⁺ donors is higher in Xiamen and the distribution of possitive donors has certain epidemiological characteristics. It is necessary to mobilize and recruit more people with a lower rate of HBsAg⁻/HBV DNA⁺ infection.</p>