TABLE 5.
Factors associated with the outcome of a nested PCR assay to detect DNA from M. hyopneumoniae in air samplesa
| Result from filter | No. of coughs/100 pigs/10 min | % Relative humidity | Age of pigs (wk) | Filter vol (liters) |
|---|---|---|---|---|
| Negative (n = 13) | ||||
| Median | 10.0 | 75.0 | 14.0 | 200.0 |
| Mean | 9.62 | 75.69 | 15.38 | 416.92 |
| SE | 2.22 | 2.88 | 0.59 | 124.57 |
| Positive (n = 15) | ||||
| Median | 13.0 | 72.0 | 13.0 | 200.0 |
| Mean | 14.87 | 68.33 | 14.40 | 465.20 |
| SE | 2.43 | 2.54 | 0.57 | 156.16 |
a
P values obtained by comparing the means in the Mann-Whitney U test (exact, two-tailed) were 0.14, 0.06, 0.12, and 0.62 for the number of coughs/100 pigs/10 min, the relative humidity, the age of the pigs, and the filter volume, respectively.