Table 3.
Comparison of log reductions (±SD) in infectivity titres and RT‐PCR titres for murine norovirus (MNV), and hepatitis A virus (HAV) in water and milk at 63 and 72°C
| Time (min) | 63°C | 72°C | ||||||
|---|---|---|---|---|---|---|---|---|
| Log reduction in infectivity | Log reduction in RT‐PCR titre | Log reduction in infectivity | Log reduction in RT‐PCR titre | |||||
| MNV | HAV | MNV | HAV | MNV | HAV | MNV | HAV | |
| (a) Water | ||||||||
| 0 | 0·00 ± 0·04 | 0·00 ± 0·05 | 0·00 ± 0·13 | 0·00 ± 0·25 | 0·00 ± 0·01 | 0·00 ± 0·20 | 0·00 ± 0·21 | 0·00 ± 0·02 |
| 1 | 1·09 ± 0·04 | 1·26 ± 0·19 | −0·01 ± 0·06 | 0·39 ± 0·04 | ≥3·5 | ≥3·5 | 0·21 ± 0·06 | 0·46 ± 0·02 |
| 2 | 3·43 ± 0·30 | 2·34 ± 0·22 | 0·18 ± 0·10 | 0·49 ± 0·15 | ≥3·5 | ≥3·5 | 0·44 ± 0·20 | 0·57 ± 0·03 |
| 5 | 3·13 ± 0·78 | ≥3·5 | 0·41 ± 0·05 | 0·45 ± 0·02 | ≥3·5 | ≥3·5 | 0·88 ± 0·04 | 0·67 ± 0·01 |
| 10 | 3·28 ± 0·04 | ≥3·5 | 0·99 ± 0·11 | 0·50 ± 0·03 | ≥3·5 | ≥3·5 | 1·02 ± 0·11 | 1·00 ± 0·09 |
| (b) Milk | ||||||||
| 0 | 0·00 ± 0·02 | 0·00 ± 0·19 | 0·00 ± 0·03 | 0·00 ± 0·02 | 0·00 ± 0·02 | 0·00 ± 0·42 | 0·00 ± 0·04 | 0·00 ± 0·10 |
| 1 | 1·35 ± 0·34 | 1·60 ± 0·39 | 0·47 ± 0·15 | 0·54 ± 0·09 | ≥3·5 | 2·22 ± 0·06 | 0·35 ± 0·20 | 0·47 ± 0·05 |
| 2 | 1·85 ± 0·27 | 2·72 ± 0·03 | 0·52 ± 0·12 | 0·60 ± 0·06 | ≥3·5 | ≥3·5 | 0·67 ± 0·04 | 0·50 ± 0·05 |
| 5 | ≥3·5 | 3·35 ± 0·20 | 0·38 ± 0·07 | 0·65 ± 0·04 | ≥3·5 | ≥3·5 | 0·82 ± 0·06 | 0·57 ± 0·03 |
| 10 | ≥3·5 | ≥3·5 | 1·03 ± 0·07 | 0·65 ± 0·06 | ≥3·5 | ≥3·5 | 0·91 ± 0·02 | 0·72 ± 0·02 |