Table 2 Number of pigs with serum antibodies against M. hyopneumoniae (IDEXX M. hyo Elisa) and average (± SEM) S/P ratio at 0, 2, 4, 6 and 8 weeks post-inoculation (PI) in the different groups

Control

0/10

0/10

0/10

0/5

0/5

0.05 ± 0.02^a

0.00 ± 0.02^a

0.12 ± 0.05^a

0.13 ± 0.09^a

0.13 ± 0.06^a

nvLV

0/20

1/20

14/20

8/10

8/10

0.12 ± 0.03^a

0.12 ± 0.04^a

0.38 ± 0.07^{a, b}

0.59 ± 0.12^{a, b}

0.59 ± 0.12^a

nvHV

0/20

2/20

20/20

10/10

10/10

0.15 ± 0.04^a

0.12 ± 0.04^a

0.61 ± 0.06^b

0.68 ± 0.10^b

0.67 ± 0.14^a

vLV

19/20

19/20

19/10

10/10

10/10

0.45 ± 0.06^b

0.84 ± 0.06^b

1.11 ± 0.08^c

1.20 ± 0.10^c

1.24 ± 0.11^b

vHV

17/20

20/20

20/20

20/20

20/20

0.46 ± 0.05^b

0.86 ± 0.06^b

1.14 ± 0.09^c

1.24 ± 0.09^c

1.26 ± 0.09^b