Table 2 Pathogenicity of the wild-type and mutant viruses in 1-day-old chicksa.

From: The glutamic residue at position 402 in the C-terminus of Newcastle disease virus nucleoprotein is critical for the virus

Virus titers

Virus

WT

NPE402A

103 EID50

1.66

1.65

102 EID50

1.52

1.66

10 EID50

0.45

1.56

  1. aThe maximum score for velogenic strains is 2.0.
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