TABLE 1.
Temperature (°C) | −80 | −20 | 4 | 23 | |
Time | 30 min | 3 | 3 | 3 | 3 |
6 h | 3 | 2 | 2 | 2 | |
1 day | 2 | 2 | 3 | 3 | |
2 days | 2 | 3 | 3 | 0 | |
4 days | 2 | 2 | 2 | 2 | |
8 days | 2 | 3 | 3 | 2 | |
16 days | 2 | 3 | 1 | 2 | |
60 days | 2 | 3 | 0 | 0 | |
90 days | 2 | 1 | 2 | 0 |
Values are the number of positive RT-qPCR results out of three tests for each experimental condition. Bold was used to present the conditions where RNA was not detected.