Figure 5.

Pathogenicity evaluation and detection of the recombinant virus. (A) Clinical status scores of the piglets: 0, normal piglets; 1, piglets that moved slowly; 2, piglets that tended to lie down; 3, piglets that often lied down; and 4, piglets that were unstable to stand or moribund. (B) Average weight gain of the piglets at the time of euthanasia. (C) Percent survival of the different piglet groups. (D) Virus detection in intestinal tissue by nested-RT-PCR. All intestinal tissue samples were collected when the piglets were moribund or euthanized at 7 days post inoculation.