TABLE 2.

IgGa-to-IgGb and IgGa-to-IgGT ratios for mean IgGa-, IgGb-, and IgGT-associated antibody to each of the R. equi Vap proteins for each horse group

Group and ratioValue of ratio for:
VapAVapCVapDVapEVapFVapGVapH
IgGa/IgGb
    Healthy adults1.89 ± 0.611.76 ± 0.94a1.27 ± 0.451.04 ± 0.91
    Pneumonic foals1.01 ± 1.750.50 ± 1.660.37 ± 0.850.53 ± 1.310.35 ± 0.910.35 ± 0.940.50 ± 1.24
    Healthy foals1.30 ± 0.941.56 ± 0.940.00 ± 0.000.62 ± 0.910.67 ± 0.940.47 ± 1.36
    Significancebacabab
IgGa/IgGT
    Healthy adults2.57 ± 0.880.56 ± 0.773.75 ± 0.442.62 ± 0.44
    Pneumonic foals0.95 ± 1.071.10 ± 0.720.62 ± 0.78
    Healthy foals1.35 ± 0.505.49 ± 0.981.25 ± 0.794.90 ± 1.64
    Significancebacb
  • a Dashes indicate an inability to calculate the ratio due to the absence of a response and hence a zero denominator.

  • b Significant differences (P ≤ 0.05 by Student's t test) between the adult and pneumonic foal group are indicated by a, those between the pneumonic and healthy foal groups are indicated by b, and those between the adult and healthy foal group are indicated by c.