Fig. 6
Improvement in the sensitivity of qPCR (a) and PCR with gel electrophoresis (b–d) to detect S. aureus in spiked blood samples through the preconcentration of the microorganism using van-PDA-MNPs. Ct value plotted against S. aureus at different concentrations (101–104 CFU/mL) in spiked blood samples with and without the preconcentration by van-SiO2-MNPs or van-PDA-MNPs. b–d Gel electrophoresis images of the amplified DNA (207 bp) of the target gene (nuc) by PCR with (c, d) and without (b) the preconcentration