Table 1.
Study experimental design and end-points
| Experimenta | Inoculated virus | No. of NHPs | Number of NHPs euthanized on indicated dpi
|
||||
|---|---|---|---|---|---|---|---|
| 3 dpib | 7 dpi | 9/10 dpic | 14 dpi | 21 dpi | |||
| 1 | Mock | 4 | ND | 1 | 1 | 1 | 1 |
| 1 | WNV | 12 | 3 | 3 | 6 | N/A | N/A |
| 1 | WN/DEN4Δ30 | 15 | 3 | 3 | 3 | 3 | 3 |
| 2 | DEN4Δ30 | 12 | ND | 3 | 3 | 3 | 3 |
| 2 | YF 17D | 12 | ND | 3 | 3 | 3 | 3 |
Due to a large number of animals and safety concerns the study was done in two separate experiments which were executed in the same manner.
The 3 dpi time point was included in the first experiment. However, this time point was omitted in the second experiment due to relatively little informational value obtained.
Six remaining NHPs infected with WNV became uniformly severely ill by 9 dpi. However, five monkeys were euthanized on 9 dpi (during late afternoon) and one monkey on the following morning (10 dpi). Since the difference in the time of euthanasia between WNV-infected monkeys was less than 24 hours, and because the corresponding time of euthanasia/necropsy for all vaccine viruses was 10 dpi, this time point is referred as 9/10 dpi hereafter. N/A – not applicable (all WNV-infected monkeys were euthanized at 9/10 dpi). ND – not done.