Table 2.
Pathogenicity analysis of NH-TA2020 strain.
| Challenged with | Days post challenge |
|||||||
|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | ||
| Number of piglets with clinical symptom | NH-TA2020 | 3/5 | 5/5 | 4/4a | 3/4 | 3/4 | 2/4 | 0/4 |
| DMEM | 0/5 | 0/5 | 0/4a | 0/4 | 0/4 | 0/4 | 0/4 | |
Note: Five 17-day-old piglets were orally challenged with 1.0 × 107 TCID50 NH-TA2020 strain. Piglets in the control group were treated with the same volume of DMEM. Numbers of piglets with clinical symptom were recorded daily including vomiting, mushy and watery diarrhea. a: two piglets were dissected for IHC and HE analysis.