| Strains | Equation | r | p |
| Equus asinus | Ca = 26.37 − 1.21 × time | −0.9200 | 0.0094* |
| Na = 30.49 − 1.93×time | −0.9968 | 0.0049* | |
| Equus caballus | Ca = 22.88 − 1.83 × time | −0.9653 | 0.0347* |
| Na = 17.71 − 1.20 × time | −0.9943 | 0.0470* | |
| Control | Ca = 18.98 − 0.02 × time | −0.9071 | 0.0276* |
| Na = 4.60 − 0.02 × time | 0.8955 | 0.0483* |