Figure 1

Presence of Mycoplasma hyopneumoniae-specific antibodies in sows and pigs. A, C Presence of M. hyopneumoniae-specific antibodies in serum and colostrum of sows at farrowing; B, D Presence of M. hyopneumoniae-specific antibodies in serum of two-day-old piglets (5 piglets per sow). Color coding of the piglets corresponds to the color of their mother of which they ingested colostrum; E Persistence of M. hyopneumoniae-specific antibodies in serum of pigs at the different sampling moments on both farms; F Persistence of M. hyopneumoniae-specific antibodies in pigs with (S / P ratio > 0.40) and without (S / P ratio ≤ 0.40) M. hyopneumoniae-specific maternal antibodies at the different sampling moments on both farms. Pigs were vaccinated against M. hyopneumoniae at 16 days of age. ***, P ≤ 0.001 between the sampling moments. d: days, m: months, MDA: maternally derived antibodies; dashed red line = S / P ratio ≤ 0.40 are seronegative animals according to the manufacturer’s instructions of the commercial ELISA used.