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

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 ^*

Dpi	Procedure	Serum IgM		Serum IgG		Serum IgA
Dpi	Procedure	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 ± 0.00^c	30 ± 0.00^b,c	0 ± 0.00^c	48 ± 16.43^b,c	0 ± 0.00
14		0 ± 0.00^c	168 ± 98.59^b,c	0 ± 0.00^c	240 ± 0.00^b,c	0 ± 0.00
21		0 ± 0.00^c	60 ± 0.00^b,c	0 ± 0.00^c	144 ± 90.99^b,c	0 ± 0.00
28		0 ± 0.00	0 ± 0.00	0 ± 0.00^c	36 ± 13.42^b,c	0 ± 0.00
35		0 ± 0.00	0 ± 0.00	0 ± 0.00^c	48 ± 16.43^b,c	0 ± 0.00
42		0 ± 0.00	0 ± 0.00	0 ± 0.00^c	36 ± 13.42^b,c	0 ± 0.00
49		0 ± 0.00	0 ± 0.00	0 ± 0.00^c	54 ± 39.12^b,c	0 ± 0.00
56	Infection I & R	0 ± 0.00	0 ± 0.00	0 ± 0.00^c	48 ± 16.43^b,c	0 ± 0.00
63		30 ± 0.00^a	30 ± 0.00^b	45 ± 21.21^a,c	264 ± 131.45^b,c	0 ± 0.00
70		216 ± 53.67^a,c	42 ± 16.43^b,c	120 ± 0.00^a,c	336 ± 131.45^b,c	30 ± 0.00^b,c
77	Euthanasia	72 ± 26.83^a	60 ± 0.00^b	195 ± 178.12^a,c	816 ± 321.99^b,c	60 ± 0.00^b,c

^*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).
^aP < 0.05 for a comparison of the control group and the infection group.
^bP < 0.05 for a comparison of the control group and the re-infection group.
^cP < 0.05 for a comparison of the infection group and the re-infection group.

ISSN: 1297-9716