Table 1

Findings in clinically healthy versus clinically sick horses


n
Histological score: median (span)
IHC (MP): median (span)
IHC (PII): median (span)
IHC (BE): median (span)
IHC (percentage): median (span)
PCR: positive cases (percentage)

Clinically healthy (Subgroups I + II)
20
0 (0–6)
0 (0–1)
0 (0–4)
17 (0–119)
1.108 (0–8.92)
9 (45)
Clinically sick (Subgroups III + IV)
25
3 (0–29)
0 (0–4)
0 (0–63)
113 (4–535)
7.304 (0.20–37.1)
15 (60)
Mann-Whitney-U *Pearson Chi Square

p = 0.010
p = 0.079
p = 0.127
p < 0.001
p < 0.001
*p = 0.316

Immunohistochemistry (IHC): Number of CP antigen-positive cells in 3 high power fields

MP: macrophages, PII: type II pneumocytes, BE: bronchiolar epithelial cells

IHC (percentage): Number of all CP antigen-positive cells in 3 high power fields in relation to all cells

Theegarten et al. Respiratory Research 2008 9:14   doi:10.1186/1465-9921-9-14