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Summary of virulence characteristics of PRV after ocular infection of rats
| Virus | No. of animals infected | Time (h) to sacrifice (s) or death (d) | Severity of symptoms | Wt change (g) |
|---|---|---|---|---|
| PRV Becker | 2 | 66 (d) | Severe | −45 |
| 66 (s) | Severe | −33 | ||
| PRV 813R | 2 | 66 (d) | Slight | −35 |
| 66 (s) | Moderate | −6 | ||
| PRV 813 | 7 | 66 (s) | Asymptomatic | +3 |
| 66 (s) | Asymptomatic | +12 | ||
| 66 (s) | Asymptomatic | +1 | ||
| 72 (s) | Slight | −11 | ||
| 71 (s) | Slight | −11 | ||
| 73 (s) | Severe | −9 | ||
| 80 (d) | Severe | −18 |
