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. 2021 Apr 16;16(4):e0247729. doi: 10.1371/journal.pone.0247729

Table 3. Number of birds positive and negative for IBV and NDV GC in choanal cleft and tracheal swabs.

IBV NDV
Choanal cleft swabs Choanal cleft swabs
Negative Positive Total Negative Positive Total
Tracheal swabs Negative 37 30 67 15 16 31
Positive 22 151 173 27 182 209
Total 59 181 240 42 198 240