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Bacteriology resultsa
| Group no.b | No. of birds positive for E. coli/no. of birds sampled |
|---|---|
| 1 | 1/15c |
| 2 | 2/15 |
| 3 | 0/15 |
| 4 | 2/15 |
| 5 | 3/15 |
| 6 | 3/15 |
| 7 | 1/15 |
| 8 | 4/15 |
The airsacs of 15 birds per group were sampled postmortem. The numbers of swabs positive for E. coli are presented for each group.
The treatment for each group is described in Table 1.
The serotype of isolate was not the same as that of the challenge strain.
