Presence of viral antigen in ducks infected with HP VN/1203/K and HP VN/1203/E virus.

AThe ducks with an asterix are obtained from the experiment described in Table 2. The ducks without an asterix are from the pathogenesis experiment.BThe days pi reflect the mean time to death for the ducks with asterix or the time of euthanasia.CNumber of samples positive for virus antigen as measured by immunohistochemistry. Scoring system: 1 = Antigen sparse, 2 = Antigen common, 3 = Antigen abundant.DOnly 5 samples available.