I could be wrong but I believe that IS how you isolate a virus. You have to mix samples of different DNA, add different chemicals and repeatedly spin the sample in a centrifuge (this is why results take over 2 days). It separates the sample into layers with the RNA on top.
If your target (covid 19) is common within the mixed sample, you should be able to find the colonies.
courses.lumenlearning.com
isolation involves the use of filtration.
Isolation of Viruses
Unlike bacteria, many of which can be grown on an artificial nutrient medium, viruses require a living host cell for replication. Infected host cells (eukaryotic or prokaryotic) can be cultured and grown, and then the growth medium can be harvested as a source of virus.
Virions in the liquid medium can be separated from the host cells by either centrifugation or filtration. Filters can physically remove anything present in the solution that is larger than the virions; the viruses can then be collected in the filtrate (see Figure 1).
filtration was not used during the alleged isolation of the sars cov2 virus
According to everyday English, mixing a patient sample with animal cells is the opposite of isolating anything!
So let’s have a look at the researchers’ own “
preliminary report” for more clues about the legitimacy of their claim of having “isolated the virus”. Below is a screenshot from the report. Note that “Vero cells” = kidney epithelial cells extracted from an African green monkey, and FBS = fetal bovine serum. Both are sources of genetic contamination.
Below is the disclaimer published by bioRxiv at the top of the preliminary report, which was apparently disregarded by Sunnybrook, the University of Toronto, etc. back in March when deciding to publicize the claim of having isolated the virus.
a
paper “
on the isolation of SARS-CoV-2 at VIDRL (which describes inoculation of Vero/hSLAM cells which led to the isolation of SARS-CoV-2 in culture)“. Can you spot the oxymoron?
Below is a screenshot from the paper’s
Supporting Information, 2.1–2.2.
And what are Vero/hSLAM cells? Below is a description provided by a supplier, Sigma Aldrich.
So the researchers at the Victorian Infectious Diseases Reference Laboratory performed the usual “monkey business” of mixing a patient sample with kidney cells from an African green monkey and fetal bovine serum (both are sources of genetic contamination), and antibiotics. They then attributed any toxic effects to “the virus” that they
assumed was in the patient sample, but never actually looked for or found in the patient sample.
Sorry no filtration is used for the sars cov2 virus.