The invention provides a method for co-extracting
DNA /
RNA (Deoxyribonucleic Acid / Ribonucleic Acid)
virus nucleic acid. The method comprises the following steps:
cracking a sample, which is diluted with
saline, with a
guanidine isothiocyanate cracking solution containing an
RNA precipitating aid agent; releasing and dissociating
DNA or
RNA of different
nucleic acid viruses in the sample into a
cracking solution; adding magnetic beads to form a
magnetic bead-
nucleic acid compound; washing to obtain a nucleic acid eluting solution. The novel method for co-extruding the
DNA and the RNA from a
respiratory tract sample is established based on the nano magnetic beads; in a whole process, toxic reagents including
phenol,
chloroform, beta-mercaptoethanol and the like are not used, and time and labor are saved. The method is used for commonly extracting the DNA and the RNA from the
respiratory tract sample and is also applicable to nucleic acid co-extraction of other samples with different types, such as
urine and blood; impurities including
protein and the like are efficiently removed and the degradation of the nucleic acid is reduced; the aim of detecting DNA viruses and RNA viruses in the same tube at the same time is realized. The method is simple, convenient, rapid and safe, and is particularly suitable for fluorescent quantitative PCR (
Polymerase Chain Reaction) detection and the like.