Table 2 Effects of various heat treatments in yellow grease on BSE-infected spinal cord homogenates
Temperature | Time (h) | Transmission rate (diseased/total) | Mean incubation time ± SD (days) | Log reduction of infectivity | Log reduction of PMCA50 |
|---|---|---|---|---|---|
140°C | 1 | 100% (6/6) | 304 ± 13*,‡ | 1.54 | 2.75 |
3 | 83% (5/6) | 382 ± 64, >790 | >3.0 | 4.0 | |
160°C | 1 | 67% (4/6) | 471 ± 80*,†, >790 | >3.0 | 3.5 |
3 | 17% (1/6) | 514, >790 | >3.0 | 6.0 | |
180°C | 1 | 100% (6/6) | 380 ± 25†,‡ | >3.0 | 3.25 |
3 | 0% (0/6) | >790 | >3.0 | 6.75 |