Table 2. Comparison of the carrier status of vaccinated rainbow trout challenged with the parental virus or with the virus passaged in vaccinated fish.
| Challenge time | Virus | Replicate Aquaria N° | Vaccinated fish positive in virological examination (%) | Cohabitant naïve fish positive in virological examination ** |
|---|---|---|---|---|
| 1 wpv* | Parental virus | 1 | 36,4 | ++++ |
| 2 | 5,6 | - | ||
| VHSV-1w 0,1 | 1 | 5,6 | - | |
| 2 | 13,6 | - | ||
| VHSV-1w 1,0 | 1 | 0 | - | |
| 2 | 5,0 | ++++ | ||
| 6 wpv | Parental virus | 1 | 0 | - |
| 2 | 15,8 | +++ | ||
| VHSV-6w 0,1 | 1 | 10,5 | +++ | |
| 2 | 5 | +++ | ||
| VHSV-6w 1,0 | 1 | 0 | - | |
| 2 | 10,0 | - |
* wpv: Weeks post vaccination
** Relation frequencies of virus positive fish: “++++” All fish were positives, “+++” more than 50% of the fish were positive, and “-” none of the fish were positives.