Table II.
Strain | Incidencea | CDS | PS | DA | DO | SI | LD |
---|---|---|---|---|---|---|---|
B6 | 16/20 (80) | 14.6 ± 2.9 | 1.7 ± 0.2 | 8.4 ± 1.3 | 19.5 ± 1.0 | 1.7 ± 0.2 | 0/16 |
H1-4RKO | 6/29 (21) | 5.0 ± 1.9 | 0.6 ± 0.2 | 2.2 ± 0.8 | 20.2 ± 0.6 | 2.2 ± 0.2 | 0/6 |
p-value | <0.0001 | 0.0007 | 0.0007 | 0.0002 |
Animals were considered affected if clinical scores ±1 were apparent for 2 or more consecutive days (percent affected). Cumulative disease score (CDS), peak score (PS) days affected (DA), day of onset (DO), severity index (SI), and lethal disease (LD). Mean trait values ± SE are shown. Significance of differences in trait values between the strains was assessed using the Fisher’s exact test (incidence) and Mann-Whitney test (clinical disease parameters).