Concentration of Viruses from Seawater
115
Table 5. The Effect of Large Volumes of Estuary Water upon the
Virus Passage Character of Orion Clarifying Filters. Original Virus Dose - 6,243,000.
Sample
PFU/total volume filtrate
Orion
Filtrate after passage through
untreated orlon filter
4,351,000
2.5 gal. of water
3,595,000
10.0 gal. of water
2,838,000
20.0 gal. of water
3,216,000
40.0 gal. of water
4,540,000
80.0 gal. of water
3,405,000
160.0 gal. of water
2,838,000
Each control and test filter was challenged with a 1 gallon volume of virus solution. All
filters were of 1 μ porosity.