Fig 7.

Kinetics of antibody responses in serum and oral fluid samples. (A) A panel of pooled oral fluid samples (n = 9) from 1,100 type II PRRSV-infected pigs collected at 7-day intervals was evaluated by FMIA. (B) A total of 1,014 serum samples obtained from 109 pigs experimentally infected with type II PRRSV were tested by FMIA. The samples were collected at 7-day intervals for the first 2 weeks and then at 14-day intervals for up to 202 dpi. The S/P ratio was calculated as follows: S/P = (MFI of sample − MFI of buffer)/(MFI of positive control − MFI of buffer).