Table 2.
Temp. | Time | Ct valuesb | PEDV titer (TCID50/g) per sample numberc |
||||
---|---|---|---|---|---|---|---|
(°C) | (d) | (mean ± SD) | 1 | 2 | 3 | 4 | 5 |
−80 | 0 | 22.0 ± 0.8 | Average 2.8 log10 | ||||
4 ± 2 | 7 | 21.6 ± 0.7a | 0.8 log10 | 0.8 log10 | 0.8 log10 | 0.93 log10 | Neg |
4 ± 2 | 14 | 30.9 ± 0.6b | Neg | Neg | Neg | 0.8 log10 | Neg |
4 ± 2 | 21 | 31.5 ± 0.3c | Neg | Neg | Neg | Neg | Neg |
12 ± 2 | 7 | 22.2 ± 1.1a | Neg | Neg | Neg | Neg | 0.8 log10 |
12 ± 2 | 14 | 24.3 ± 1.0b | Neg | Neg | Neg | Neg | Neg |
12 ± 2 | 21 | 31.1 ± 0.3c | Neg | Neg | Neg | Neg | Neg |
22 ± 2 | 7 | 21.1 ± 0.6a | Neg | Neg | Neg | Neg | Neg |
22 ± 2 | 14 | 32.6 ± 1.3b | Neg | Neg | Neg | Neg | Neg |
22 ± 2 | 21 | 34.8 ± 2.0c | Neg | Neg | Neg | Neg | Neg |
The theoretical limit of detection of the PED virus isolation method used was estimated to be able to detect as low as 1.0 viral particles/g.
PEDV Ct values with uncommon superscripts within temperature by time storage condition differ (P < 0.05).
Neg = negative or not detectable.