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stability of plasma/viral load in PPT tube

Sep 22, 2003

Doctor Holodniy,

How long can plasma in a PPT tube remain at room temperature without in any way diluting viral load for a test? If blood was drawn and plasma was spun on day one, then the PPT tube was shipped overseas and remained unrefrigerated for 5 days, could this possibly dilute the viral load for a test?

Also, the PPT tube was frozen at the end of day 5 - does freezing and unfreezing affect viral load?


Response from Dr. Holodniy

You are asking alot from a blood sample, collected in any tube. It is likely that there would be loss of viral load under the conditions you describe. How much is anyone's guess.

CD4 / CD8 Ratio
re: WBC, AST, ALT and Trizivir

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