The safety and protective efficacy of a new one dose combination vaccine containing Porcine Circovirus
type 2 (PCV2) and M. hyopneumoniae antigens – Porcilis PCV M Hyo - was evaluated in laboratory studies
and under field conditions. Vaccination resulted in a moderate temperature increase on the day of
vaccination and mild systemic and local reactions were found in only a low percentage of the vaccinated
pigs. The local reactions observed were small (max. 2 cm) and transient (max. 1 day). In short term (onset
of immunity) and long term (duration of immunity) challenge studies with the individual pathogens, the
vaccine significantly reduced the PCV2 load in lymphoid tissue and lungs and M. hyopneumoniae-induced
lung lesions. In a placebo-controlled field trial on a farm where both PCV2 and M. hyopneumoniae were
present, vaccination of piglets at 3 weeks of age resulted in a reduction of PCV2 viremia and shedding and
lower lung lesion scores at slaughter. In addition, a positive effect on the average daily weight gain (+ 34
g/day) in the finishing phase was observed. It can therefore be concluded that this new ready to use combination
vaccine is safe and efficacious against PCV2 and M. hyopneumoniae single and combined
infections.