Table 7 Histopathological scoring of lungs from sheep infected with PBS (control) or with M. ovipneumoniae- containing nasal-wash fluids through inoculation of the upper (URT) or lower respiratory tract (LRT)

3.4 ± 1.1

3.8 ± 0.5

3.2 ± 0.8

0.6631

3.2 ± 0.8

3.5 ± 0.6

3.6 ± 0.9

0.7212

0.8 ± 1.1^a

2.8 ± 0.5^b

5.0 ± 1.2^c

0.0002

0.2 ± 0.4

0.8 ± 1.0

1.0 ± 0.0

0.1207

0.2 ± 0.4^a

1.5 ± 0.6^a

4.4 ± 1.5^b

0.0001

0.0 ± 0.0

0.0 ± 0.0

0.2 ± 0.4

0.4406

0.6 ± 0.5^a

3.3 ± 1.0^b

4.2 ± 0.8^b

 < 0.0001

0.4 ± 0.5

1.0 ± 0.0

1.2 ± 0.8

0.1406

8.8 ± 3.1^a

11.3 ± 1.3^a

22.8 ± 4.1^b

 < 0.0001