Figure 2.

Daily clinical expiratory effort score, 0–3. Expiratory effort (e.g., forced expiratory effort; abdominal effort) was scored by: 0 = no expiratory effort; 1 = earliest detection of increased expiratory effort; 2 = moderate effort, observed without picking up lamb; 3 = hard abdominal effort with nostril flaring. On day 6 p.i. the intranasally-inoculated HEp-2-grown virus group had a significantly higher clinical expiratory effort score, p < 0.05 designated by an asterisk (*) compared to control lambs. Control n = 4, Intranasal (IN) HEp-2 n = 4, Intranasal (IN) Vero n = 4, Nebulized HEp-2 n = 5, Nebulized Vero n = 2.