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Table 5 Frequency of isolation of challenge virus from SPF chickens

From: Characterization of virulent Newcastle disease viruses from vaccinated chicken flocks in Eastern China

Group Samples (positive/total)
Day 3 pc Day 5 pc Day 7 pc
OS CS OS CS OS CS
La-JS22 7/10 2/10 5/10 6/10 1/10 2/10
La-JS14 10/10 5/10 7/10 7/10 3/10 4/10
Control-SD 5/5 5/5
Control-JS 5/5 5/5
  1. –the birds were all dead within the day 5pc
  2. OS = oral swabs; CS = cloacal swabs