TABLE 4.

Recovery yields of viruses from 1 liter of artificial seawater

Initial poliovirus concn in artificial seawatera (1,000 ml) (PFU/ml)	Poliovirus concn of the eluatea (5 ml) (PFU/ml)	% Recovery
1.7 × 102	1.7 × 104	50
	1.8 × 104	53
	1.7 × 104	50
	2.1 × 104	62
1.3 × 102	1.6 × 104	62
	1.9 × 104	73
	1.8 × 104	69
	1.9 × 104	73
Avg		61.5
SD		10

^aAverage from two plates.