PREVENTION OF PIGS CIRCOVIRUS INFECTION
The researches show that at the farms free of PMWS it is necessary to conduct a complex of veterinary-sanitary measures aimed at protecting them from the introduction of the infectious agent. In problematic households it is recommended to maintain an optimum stocking density in the pen, the separation of animals by an age, regular full vacation of pens at the background of a timely removal of sick animals, introduction of a two-phase system of pigs growing at which piglets after weaning are left in the farrow pens up to 3-4 months of age. Since an activation of the immune system of piglets using immunostimulants and vaccines promotes active PCV-2 propagation and development of the disease a vaccination is not recommended for piglets 60-90 days of age. Positive results have been obtained for the prevention and treatment of PMWS using slaughter pigs serum containing antibodies to circovirus. Intraperitoneal introduction of 3-5 ml of serum to piglets 30 days of age leads to a disease decrease by several times (before the serum introduction the death of piglets was 22.2 %, after treatment - 6.4 %). Serotherapy carried out at the beginning of the disease is accompanied by a therapeutic effect in 42-45 % of cases. It is necessary to understand the three main points of the vaccination success: the age of a mass infection of field strain PCV2, the age at which there is a clinical disease with a typical PCV2 (multisystemic wasting, dermanephrotic syndrome), what is a maternal immunity tension at the moment of a single vaccination with a Portsilis PSV vaccine. It should be remembered that any vaccination against CVPD is not a panacea, and can only be an efficient measure among the complex of events.