2.4.3. Viral RNA extraction
Lysed viral particles were processed on a NucliSens® easyMAG™ platform
(bioMérieux) for viral RNA extraction using the “off-board Specific
A” protocol according to the manufacturer's instructions. Nucleic acids
were then eluted in 70 μL of elution buffer and stored at −80 °C.
For a negative control of the RNA extraction, we added 100 μL of the
DEPC-treated water used to dilute the viruses to the lysis buffer.
Each experiment set, from spiking to RNA extraction, was performed
three times.
2.5. RT-qPCR conditions
One-step monoplex RT-qPCR amplifications were performed in duplicate
on the CFX96™ real-time PCR detection system (Bio-Rad).