The detection and quantification limits of the real-time PCR assay with EvaGreen fluorescent dye were determined using genomic DNA that was isolated from samples that had not been irradiated. The minimum level of detection of the amplicons that were obtained with the 18Sn519F/18Sn519R primer set was 0.004 ng/μl, where the melting temperature of the amplicons was approximately 89.2 °C. The results of the sensitivity test showed that 0.5 kGy could be detected with Ct values of 15.99 and using 18Sn519F/18Sn519R primer set (data not shown).