From: Interstitial lung disease associated with Equine Infectious Anemia Virus infection in horses
Type of lesion | Â | Number of cases | |
---|---|---|---|
EIAV pos | EIAV neg | ||
[A] Lymphocyte infiltration | Absence: | 14 | 11 |
Presence: | 65 | 3 | |
 | Grade: |  |  |
[B] (Peri)bronchiolar inflammation | 0 | 15 | 11 |
I | 41 | 3 | |
II | 17 | 0 | |
III | 5 | 0 | |
IV | 1 | 0 | |
[C] Thickness of the septa | 0 | 24 | 13 |
I | 34 | 1 | |
II | 21 | 0 | |
III | 0 | 0 | |
 | Histological score* [(B + C)/2] | ||
No lesions | 0 (0–0.4) | 13 | 11 |
Mild lesions | I (0.5-1.4) | 35 | 3 |
Moderate lesions | II (1.5-2.4) | 27 | 0 |
Severe lesions | III (>2.4) | 4 | 0 |
 | Mean score: | 1.09 | 0.17 |