Table 2.
Viral shedding from cloacal swabs of experimental SPF chicken following challenge with virulent Newcastle disease virus.
| Group $ (n = 6/Group) | Days Post-Challenge | ||
|---|---|---|---|
| 4 | 7 | 14 | |
| A | Died | Died | Died |
| B | 100 (6) | 100 (6) | 100 (6) |
| C | 100 (6) | 100 (6) | 66.67 (4) |
| D | 66.67 (4) | 66.67 (4) | 33.33 (2) |
| E | 0 (0) | 0 (0) | 0 (0) |
| F | 66.67 (4) | 66.67 (4) | 33.33 (2) * |
| G | 66.67 (4) | 66.67 (4) | Died |
Values in the parenthesis indicate the number of positive observations for six birds tested. $ Group A: control; group B: commercial NDV vaccine; group C: inactivated NDV vaccine; group D: inactivated NDV vaccine with LPS; group E: inactivated NDV vaccine with R-848; group F: inactivated NDV vaccine with LPS (25 µg) + R-848 (25 µg) and group G: inactivated NDV vaccine with LPS (50 µg) + R-848 (50 µg). * Only two surviving birds were tested for viral shedding.