Table 8 Clinical parameters and scoring system in the dual challenge (PRRS+Mhyop) study in piglets
Parameter | Classification and score | |||
|---|---|---|---|---|
Normal Score = 0 | Mild Score = 1 | Moderate Score = 2 | Severe Score = 3 | |
Rectal temperature | 37.5–39.5 °C | 39.6–40.0 °C | 40.1–40.9 °C | ≥41.0 or < 37.5 °C |
Demeanour | Normal | Reduced activity, reduced appetite | Reluctance to rise, reduced appetite | Recumbent, moribund |
Nasal discharge | Absent | Serous | Seromucoid | Mucoid |
Coughing | Absent | 1–2 dry coughs | > 2 dry coughs or 1–2 productive coughs | > 2 productive coughs |
Respiration | Normal | Slightly increased respiratory rate or effort | More pronounced increased respiratory rate and effort | Respiratory distress, open mouth breathing |