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Table 4 Mean C. suis S45-specific IgM, IgG and IgA serum titers of the infection (I) and the re-infection (R) group ± standard deviation *

From: The immune response against Chlamydia suis genital tract infection partially protects against re-infection

Dpi Procedure Serum IgM Serum IgG Serum IgA
Infection group Re-infection group Infection group Re-infection group Re-infection group
0 Infection R 0 ± 0.00 0 ± 0.00 0 ± 0.00 0 ± 0.00 0 ± 0.00
7   0 ± 0.00c 30 ± 0.00b,c 0 ± 0.00c 48 ± 16.43b,c 0 ± 0.00
14   0 ± 0.00c 168 ± 98.59b,c 0 ± 0.00c 240 ± 0.00b,c 0 ± 0.00
21   0 ± 0.00c 60 ± 0.00b,c 0 ± 0.00c 144 ± 90.99b,c 0 ± 0.00
28   0 ± 0.00 0 ± 0.00 0 ± 0.00c 36 ± 13.42b,c 0 ± 0.00
35   0 ± 0.00 0 ± 0.00 0 ± 0.00c 48 ± 16.43b,c 0 ± 0.00
42   0 ± 0.00 0 ± 0.00 0 ± 0.00c 36 ± 13.42b,c 0 ± 0.00
49   0 ± 0.00 0 ± 0.00 0 ± 0.00c 54 ± 39.12b,c 0 ± 0.00
56 Infection I & R 0 ± 0.00 0 ± 0.00 0 ± 0.00c 48 ± 16.43b,c 0 ± 0.00
63   30 ± 0.00a 30 ± 0.00b 45 ± 21.21a,c 264 ± 131.45b,c 0 ± 0.00
70   216 ± 53.67a,c 42 ± 16.43b,c 120 ± 0.00a,c 336 ± 131.45b,c 30 ± 0.00b,c
77 Euthanasia 72 ± 26.83a 60 ± 0.00b 195 ± 178.12a,c 816 ± 321.99b,c 60 ± 0.00b,c
  1. *The mean IgM, IgG and IgA serum antibody titers ± SD in the control group and the mean IgA serum titers ± SD in the infection group were 0 ± 0.00 for all time points. Antibody titers were defined as the reciprocal of the highest dilution that gave an absorbance reading at 405 nm above the cut-off value (mean absorbance of seronegative pig serum + twice the standard deviation).
  2. aP < 0.05 for a comparison of the control group and the infection group.
  3. bP < 0.05 for a comparison of the control group and the re-infection group.
  4. cP < 0.05 for a comparison of the infection group and the re-infection group.