Research Article
The Effectiveness of Anti-R. equi Hyperimmune Plasma against R. equi Challenge in Thoroughbred Arabian Foals of Mares Vaccinated with R. equi Vaccine
Table 2
Anti-R. equi antibody ELISA titer of vaccinated and unvaccinated mares and challenged foals.
| Mare group | Mare number | ELISA titer at birth | Foal group | Foal number | ELISA titer after challenge | Day 0 | Day 10 | Day 20 |
| Vaccinated | 1 | 1/12800 | Vaccine + HI plasma | 1 | 1/800 | 1/1600 | 1/1600 | 2 | 1/6400 | 2 | 1/100 | 1/400 | 1/800 | 3 | 1/3200 | 3 | 1/800 | 1/1600 | 1/1600 | 4 | 1/6400 | 4 | 1/400 | 1/800 | 1/800 |
| Unvaccinated | 5 | Negative | Control | 5 | 0 | 1/200 | * | 6 | 1/200 | 6 | 0 | Negative | 1/200 | 7 | Negative | 7 | 0 | * | * | 8 | Negative | ā | 8 | 0 | Negative | 1/200 |
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Because foals died, ELISA titer was not measured on these days.
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