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System for scoring clinical signs of infection by porcine reproductive and respiratory syndrome virus
| Sign | Score |
|---|---|
| Sneezing | 1 |
| Nonproductive cough | |
| Light | 1 |
| Moderate | 2 |
| Severe | 3 |
| Productive cough | |
| Light | 2 |
| Moderate | 3 |
| Severe | 4 |
| Behavior | |
| Normal | 0 |
| Lethargic | 2 |
| Stimulus needed to take normal position after recumbency | 3 |
| Prolonged recumbency | 6 |
Euthanasia is required when the total score is ≥ 6 according to the Animal Care Ethic Committee.
