Fig. (1) Analytical sensitivity of CMV detection PCR-ELISA system. A. The results of the PCR-ELISA for 10-fold serial dilution of control plasmid containing gB2 sequence. The detection limit was 0.35 fg of plasmid DNA (~ 100 copies). The Pearson’s correlation coefficient between PCR-ELISA OD and logarithmic scale of plasmid DNA was 0.979 that represents the linear regression. B. Electrophoresis of the PCR products by 2% agarose gel with ethidium bromide staining (226 bp).