Table 1.
The number of Escherichia coli isolates during the resting and growing periods in three poultry farms.
| Bacteria | Farm | Period | Positive/total swabs (%) | P value | Pearson χ2value1, df2 |
|---|---|---|---|---|---|
| E. coli (n = 105) | A | Resting | 8/28, 28.6 | 0.17 | 1.88, 1 |
| A | Growing | 18/40, 45.0 | |||
| B | Resting | 14/26, 53.8 | 0.24 | 1.35, 1 | |
| B | Growing | 22/32, 68.8 | |||
| C | Resting | 4/51, 7.8 | <0.01 | 47.75, 1 | |
| C | Growing | 39/52, 75.0 |
1Pearson χ2 test was used to calculated P value of positive and negative samples in different periods of each farm. 2df = degree of freedom.