These data are in agreement with the previously
discussed results on the humoral compartment of immunity.
In particular, 4 weeks after vaccination and at the end
of the study, the intradermally (Group A) and intramuscularly
(Group B) vaccinated animals showed significant
higher numbers of M. hyopneumoniae-specific IFN-g SC
compared to the other groups. Additionally, a positive
correlation between IgG levels in sera and IFN-g SC
number (q = 0.65; p < 0.05) was also detected in the A and
B treated pigs compared to the others.