Figure 3.

Level of NABs in colostrum (A), serum (B), and milk (C) of sows administered an injected PEDV vaccine (INJ; n = 4), a low-dose oral PEDV vaccine (LOV; n = 4), a high-dose oral PEDV vaccine (HOV; n = 4) or serve as non-vaccinated controls (CON; n = 4) during pregnancy. Serum and colostrum samples were collected immediately after farrowing, whereas milk samples were collected 6 d post-challenge. Results are presented as the log of the highest titer that provided a positive result, with a dilution of 20-fold being the limit of detection for a positive sample. Values are means ± SD. Values with different letters (a, b) p ≤ 0.05.