Does anyone knows the pH acceptable range for virus transport medium (VTM) for Sars cov 2 samples? I supose that it depends if you are only testing by PCR or if you need viability for culture but does anyone has experience in this subject?
Found a studie that defends that in normal individuals with no history of reflux or eustachian tube dysfunction, the pH values range from 6.10 to 7.92 with an average pH of 7.03 (SD, 0.67) so i believe that VTM should be buffered around pH 7 (with a variation of plus or minus 1) but need to confirm that.
Article Detecting Nasopharyngeal Reflux: A Novel pH Probe Technique
Thank you and be safe.
You can the official CDC publication or this one, if you need more information:
www.viraltransportmedium.com
https://www.sonoraquest.com/media/6276/covid-19-sql-specimen-collection-devices_041720.pdf
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