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Criteria of diarrhea index.
| Sparse stool rate | Average sparse stool level = addition of sparse stool series/number of sparse stool | |
|---|---|---|
| The number of diluted stools per animal/the total number of feces per animal | Grade 1 | Stain diameter <1 cm |
| Grade 2 | Stain diameter 1–1.9 cm | |
| Grade 3 | Stain diameter 2–3 cm | |
| Grade 4 | Stain diameter >3 cm | |
Diarrhea index = Sparse stool rate × average dilute stool level.
