Fig. 4

Quantitative Detection of HBV DNA in 67 HBsAg-positive and 67 HBsAg-negative serum-DBS paired samples. Detection of HBV DNA by different medium and PCR-Taq among 67 HBsAg positive and 67 HBsAg-negative (a) Serum samples (b) DBS samples. The HBV viral load is expressed as copies per milliliter on the y-axis and different nucleic acid extraction and measurement are presented on the x-axis. The red circular markers indicate HBeAg positive while the blue circular markers indicate HBeAg negative.