Table 3.
Description of respiratory score (RS) and bronchoalveolar lavage fluid (BALF) findings grouped by ultrasonographic (US) lesion score (LS) in Holstein dairy calves. All values represent medians (interquartile ranges)
| Variable | Normal | Comet‐Tails | Varying Levels of US Consolidation | All US Consolidation | ||
|---|---|---|---|---|---|---|
| LS0, n = 4 | LS1, n = 5 | LS2, n = 5 | LS3, n = 5 | LS4, n = 5 | n = 15 | |
| Age (days) | 28 (25–41) | 32 (25–65) | 68 (54–76) | 62 (24–64) | 71 (71–84) | 65 (52–74) |
| RS | 2 (2–2) | 2 (2–3) | 2 (2–4) | 3 (3–3) | 2 (2–3) | 3 (2–4) |
| US lesion (cm) | 0 | 0 | 0.5 (0.25–0.50) | 1.0 (1.0–1.5)b | 6 (4–8)b | 1.5 (0.63–4)a , b |
| TNCC (×109 cells/L) | 0.59 (0.45–0.80) | 0.34 (0.30–0.90) | 0.51 (0.25–0.73) | 0.46 (0.33–0.56) | 0.72 (0.52–0.82) | 0.52 (0.29–0.73) |
| Neut (%) | 1 (1–2) | 2 (2–11) | 25 (9–28) | 8 (3–14) | 17 (12–20) | 14 (7–22)a |
| Mac (%) | 97 (96–99) | 91 (78–93) | 69 (67–79) | 82 (80–92) | 79 (74–85) | 79 (74–89)a |
| Lymph (%) | 1 (1–2) | 7 (5–8) | 6 (3–11) | 5 (4–8) | 3 (3–3) | 4 (3–8) |
LS0, completely normal ultrasonographic exam; LS1, comet‐tailing artifacts on ultrasonographic exam; LS2, <1 cm consolidation on ultrasonographic exam; LS3, 1–3 cm consolidation on ultrasonographic exam; LS4, >3 cm consolidation on ultrasonographic exam; TNCC, total nucleated cell count; Neut, BALF neutrophil proportion; Mac, BALF macrophage proportion; Lymph, BALF lymphocyte proportion.
aDiffers significantly from LS0. bDiffers significantly from LS1. Bonferroni's correction for multiple comparisons P ≤ .01.