| Media | Number of bacteria administereda) | Dead chicks/chicks administered the SE#15h strain | Chicks from which bacteria were isolated b)/ chicks administered the SE#15h strain |
| FCS | 3.3 × 100 | 0/5 | 3/5 |
| 3.3× 101 | 0/5 | 1/5 | |
| 3.3 × 102 | 0/5 | 1/5 | |
| 5.3 × 106 | 5/5 | NT | |
| HCS | 4.0 × 101 | 2/5 | 2/5 |
| 4.0 × 102 | 1/5 | 1/5 | |
| 4.0 × 103 | 2/5 | 2/5 | |
| 4.3 × 108 | 5/5 | NT | |
| SE non-administration | 0/5 | 0/5 |