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Serum neutralization titers pre- and post-vaccination. Pre- and post-vaccine sera were evaluated for the ability to neutralize Sarcocystis neurona infections in vitro. The last dilution of serum showing no parasite growth in 50% of wells containing irradiated mouse fibroblasts was considered the TCID50. The lowest dilution was 1:4 for all sera tested
| Horse ID | Pre-vaccine TCID50 | Post-vaccine TCID50 |
|---|---|---|
| 1 | < 4 | 32 |
| 3 | < 4 | 64 |
| 6 | < 4 | 128 |
| 7 | < 4 | 64 |
| 9 | < 4 | 32 |
