Table I.
Experimental design for the evaluation Mycoplasma hyopneumoniae transmission from asymptomatic carriers to unvaccinated and vaccinated populations
| Days post-infection | Study activity | Experimental group |
|---|---|---|
| 0 | Experimental infection | Seedersa (n = 36) |
| 80 to 94 | Transmission assessment 1 | Seeders (n = 9) + Unvaccinated sentinelsb (n = 15) |
| Seeders (n = 9) + Vaccinated sentinelsc (n = 15) | ||
| 200 to 214 | Transmission assessment 2 | Seeders (n = 9) + Unvaccinated sentinels (n = 15) |
| Seeders (n = 9) + Vaccinated sentinels (n = 15) |
a
Gilts experimentally infected with M. hyopneumoniae strain 232.
b
M. hyopneumoniae negative and unvaccinated gilts.
c
M. hyopneumoniae negative gilts, vaccinated with a commercial bacterin 15 and 30 d prior to the first day of the transmission experiment.
Sentinels were age-matched with seeders.