TABLE 6.
Prevalence of M. hyopneumoniae as determined by lung culture, titration of lung tissue, and FA
| Group |
M. hyopneumoniae result at the following necropsy date:
|
||||||||
|---|---|---|---|---|---|---|---|---|---|
| Day 3
|
Day 10
|
Day 28
|
|||||||
| No. of pigs positivea | Titerb | No. of pigs FA positive | No. of pigs positive | Titer | No. of pigs FA positive | No. of pigs positive | Titer | No. of pigs FA positive | |
| A | 5/6 | 105.0 | 0/6 | 5/6 | 106.0 | 4/6 | 8/8 | 106.6 | 8/8 |
| B | 1/6 | NDc | 0/6 | 0/6 | ND | 0/6 | 3/8 | ND | 3/8 |
| Cd | 3/6 | 106.0 | 1/6 | 5/6 | 107.2 | 6/6 | 8/8 | 107.0 | 8/8 |
| D | 1/6 | ND | 0/6 | 1/6 | ND | 1/6 | 3/8 | ND | 1/8 |
| E | 3/6 | 103.3 | 0/6 | 4/6 | 107.0 | 4/6 | 8/8 | 107.3 | 8/8 |
| F | 0/6 | ND | 0/6 | 0/6 | ND | 0/6 | 0/8 | ND | 0/8 |
| G | 0/6 | ND | 0/6 | 0/6 | ND | 0/6 | 0/7 | ND | 0/7 |
a
Number of pigs positive for M. hyopneumoniae in ground lung tissue.
b
CCU of M. hyopneumoniae per milliliter.
c
ND, not done.
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 number of days after inoculation with PRRSV.