Clinical symptoms in experimentally infected groups. The percentage of animals in three weeks old, colostrum-deprived piglets showing diverse signs of disease. Observations were made twice daily during a time frame of 26 days post inoculation with either a combination of PCV2 and PRRSV (PCV2/PRRSV), PCV2 and PPV (PCV2/PPV) or phosphate buffered saline (controls).
Koene et al. BMC Veterinary Research 2012 8:32 doi:10.1186/1746-6148-8-32