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Table 3 CPE Analysis for Poliovirus at a virus titer of 107 PFU/ml.

From: Detection and quantification of poliovirus infection using FTIR spectroscopy and cell culture

Sample of Known Titer (PFU/ml) Dilution Factor Estimated PFU/ml S.E.
1000000 -6 7000000 2000000
100000 -5 550000 50000
100000 -4 380000 40000
10000 -4 35000 5000
10000 -3 39500 2500
1000 -3 4000 0
1000 -2 3300 100
10 -1 5 5