The observations made during the challenge experiments were
confirmed in the field efficacy trial: strong reductions in PCV2 viral
load and M. hyopneumoniae-induced lung lesions were measured.
The field efficacy study showed that vaccination with Porcilis
PCV M Hyo reduced the level of the viral load of the pigs in serum
and excretions via the nasal and fecal route after infection. The
PCV2 infection encountered in the field study was primarily
subclinical.
The serological and virological profiling of the animals in the
field efficacy study indicates that PCV2 infection started at approximately
8 wpv and an increase in the number of M. hyopneumoniae