Table 1.
Demographic, clinical and molecular results from 161 horses involved in four separate ECoV outbreaks.
| Outbreak | TX | WI | CA | MA |
|---|---|---|---|---|
| Date | November 2011 | February 2012 | April 2012 | April 2012 |
| Affected horses/total horses (%) | 16/28 (57) | 16/33 (48) | 13/65 (20) | 14/35 (40) |
| Clinical signs | ||||
| Anorexia | 16 | 14 | 10 | 12 |
| Lethargy | 10 | 13 | 12 | 11 |
| Fever (T > 101.5 °F) | 10 | 14 | 11 | 8 |
| Colic | 0 | 0 | 2 | 2 |
| Soft formed feces/diarrhea | 0 | 2 | 5 | 5 |
| No clinical signs | 12 | 17 | 52 | 21 |
| Fatality | 1 | 2 | 0 | 1 |
| PCR results for ECoV | ||||
| Positive sick horses | 8 | 11 | 14 | 5 |
| Negative sick horses | 0 | 3 | 1 | 2 |
| Positive healthy horses | 0 | 6 | 0 | 1 |
| Negative healthy horses | 0 | 17 | 17 | 55 |