Pigs contra circovirus. Protection of pigs vaccinated with inactivated subunit vaccine [Sertések kontra circovírus inaktivált alegységvakcinával immunizált sertések védettsége]

The authors carried out vaccination on a pig farm fattening for high weight, where they demonstrated earlier the presence of and loss due to porcine circovirus (PCV2). From the two groups (261-261 animals) kept under the same conditions, one was vaccinated with sub-unit vaccine at weaning, at the age of 27 days, while the other was not vaccinated. At the time of vaccination all pigs of both groups were negative by PCR test. In the control group 4 weeks after weaning and also before slaughtering PCVD occurred in clinical signs, and PCR-test proved viraemia. Death rate and culling was higher in all stage of rearing in the control group: all death was 12.6 v. 4.2%, and culling 13.8 v. 7.3%. Carcase weight of pigs slaughter on 303rd day was larger by 5.1 kg in the vaccinated group. Single vaccination with inactivated sub-unit vaccine at the weaning gave adequate protection for 9 months against circovirus infection.