Abstract
Virus removal studies are used to insure the safety of biopharmaceutical products by quantitatively estimating the viral clearance capacity by the manufacturing process. Virus quantification assays are used to measure the log 10 clearance factor of individual purification unit operations in spike recovery studies. We have developed a multiplex RT Q-PCR assay that detects and quantifies three commonly used model viruses X-MuLV, SV40, and MMV simultaneously. This RT Q-PCR multiplex assay has a 6 log 10 dynamic range with a limit of detection (LOD) of ≈1 genome copy/μL. Amplification profiles are similar to existing singleplex assays. Overall, this RT Q-PCR multiplex assay is highly quantitative, accurately identifies multiple viruses simultaneously, and may prove useful to validate viral clearance of biological products in small scale studies.
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