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Neurovirulence of CHAT, Cox, and CHAT-VAPP strains
| Strain | No. of clinically affected animals/total | Mean histological lesion score |
|---|---|---|
| Sabin 1 | 0/4 | 0.56 |
| CHAT 10A-11 | 2/4 | 1.22 |
| CHAT Yugo | 1/3 | 1.27 |
| Cox | 2/4 | 1.55 |
| 134 | 4/4 | 2.01 |
| 136 | 2/3 | 1.85 |
| Mahoney | 4/4 | 2.5 |
