Table 4.

Poliovirus 1 survival on produce stored at 4 °C

Time (days)	Lettuce		Strawberries
	Virus recovereda (log10 ± SD)	log10 reductionb	Virus recovereda (log10 ± SD)	log10 reductionb
0	6.87 ± 0.33	0.00	4.72 ± 0.37	0.00
1	6.91 ± 0.30	0.00*	3.88 ± 0.70	0.84*
2	6.96 ± 0.29	0.00	4.03 ± 1.08	0.69
4	6.90 ± 0.19	0.00*	3.72 ± 0.60	1.01*
8	6.50 ± 0.20	0.36*	3.49 ± 0.66	1.24*
10	5.83 ± 0.47	1.03	4.33 ± 0.39	0.39

SD  standard deviation

* Statistically significant difference between the survival on strawberries and lettuce (P ≤ 0.05)

^aAverage of six replicates from two experiments (assayed by the plaque forming method)

^bAverage Log₁₀ reduction (−log₁₀ N _t/N ₀ where N _t is the titer of virus at the specified day and N ₀ is the titer of virus at time = 0)