TABLE 6

Tracheal lesion scores and mucosal thicknesses in birds in infectivity and virulence study

GroupInoculumMedian tracheal lesion score (minimum, maximum)aMean tracheal mucosal thickness ± SD (μm)a
UpperMiddleLowerUpperMiddleLower
1Medium0.25 (0, 0.5)A0.25 (0, 0.5)A0 (0, 0.25)A50 ± 11A41 ± 8A37 ± 6A
2Mutant 03-11 (0.25, 3)B0.375 (0, 1.5)A0.25 (0, 1.5)A89 ± 45B54 ± 12A46 ± 22A
3Mutant 18-10.25 (0, 10)A,B0.25 (0, 1.5)A0.25 (0, 1.5)A62 ± 15A,B53 ± 15A49 ± 15A,B
4Mutant 20-10.25 (0, 1.5)A0.125 (0, 1.5)A0.125 (0, 1.0)A56 ± 22A49 ± 23A51 ± 19A
5Mutant 22-10.5 (0, 1)A,B0.25 (0, 1)A0 (0, 0.25)A64 ± 13A,B49 ± 8A39 ± 8A
6Mutant 26-10.5 (0, 2)A,B0.25 (0, 1)A0 (0, 2)A64 ± 24A,B49 ± 14A48 ± 22A
7Wild-type Ap3AS1.5 (1, 3)C1.50 (0.5, 3)B1.50 (0.25, 3)B168 ± 70C153 ± 84B120 ± 56B
  • a Data in the same column marked with the same superscript letter were not significantly different.