Viral Concentration and Amplification from Human Serum Samples Prior to Application of Next-Generation Sequencing Analysis.

The protocol presented here allows the isolation, purification, nucleic acid extraction, and amplification of DNA/RNA from viruses present in human sera samples. The method allows the random amplification of the viral genomes present by using a Sequence-Independent, Single-Primer Amplification (SISPA) approach enabling the study of both DNA/RNA viruses. An amplification step is needed, as the concentration of viral DNA/RNA in serum samples is low for direct library preparation. The application of the described protocol guarantees enough randomly amplified double-strand DNA for further library preparation using Nextera XT kit from Illumina.