TABLE 3.
Percentage of lung with visible pneumonia lesions in pigs infected with either M. hyopneumoniae, PRRSV, or both
| Group | % of lung exhibiting pneumonia induced by PRRSVa or M. hyopneumoniaeb at the following necropsy date:
|
|||||
|---|---|---|---|---|---|---|
| Day 3
|
Day 10
|
Day 28
|
||||
| PRRSV | M. hyopneumoniae | PRRSV | M. hyopneumoniae | PRRSV | M. hyopneumoniae | |
| A | 8.2 ± 4.5 Bc | 0.2 ± 0.3 | 50.8 ± 15.9 A | 4.1 ± 4.1 A | 42.9 ± 7.5 A | 7.7 ± 5.7 A |
| B | 12.3 ± 6.0 B | 1.6 ± 1.7 | 48.8 ± 26.4 A | 1.3 ± 2.2 B | 15.6 ± 14.5 C | 3.3 ± 5.9 B,C |
| Cd | 42.8 ± 12.8 A | 0.01 ± 0.02 | 29.5 ± 9.1 B | 2.5 ± 3.1 A,B | 28.8 ± 14.1 B | 7.2 ± 8.1 A,B |
| D | 0 C | 0.1 ± 0.1 | 0 C | 0.9 ± 2.1 B | 0 D | 1.2 ± 3.0 C,D |
| E | 0 C | 0.2 ± 0.3 | 0 C | 0.2 ± 0.2 B | 0 D | 8.3 ± 4.0 A |
| F | 13.7 ± 5.8 B | 0.1 ± 0.2 | 56.5 ± 12.7 A | 0.05 ± 0.1 B | 0.8 ± 1.59 D | 0 D |
| G | 0 C | 0.1 ± 0.3 | 0 C | 0.02 ± 0.05 B | 0 D | 0 D |
a
As estimated by visual observation.
b
As determined by lesion sketches and image analysis.
c
Within each column, values followed by different letters (A, B, C, or D) are significantly different from each other (P < 0.001).
d
Group C received PRRSV on day −10 and M. hyopneumoniae on day 0 and so is not matched with the other groups with respect to the number of days after inoculation with PRRSV.