AN ATTEMPT TO ELIMINATE PORCINE REPRODUCTIVE AND RESPIRATORY SYNDROME (PRRS) BY SERUM INOCULATION ON SMALL PIG FARM

作者：Stukelj Marina^*; Toplak Ivan; Valencak Zdravko

来源：Slovenian Veterinary Research, 2013, 50(4): 193-200.

• control
• immunization
• pig
• PRRS
• serum inoculation

The great heterogeneity among porcine reproductive and respiratory syndrome virus (PRRSV) isolates is probably the main obstacle to its effective control using current commercial vaccines, since the induced immunity by one strain is specific only to this strain. Exposure of all breeding pigs to the PRRSV circulating on the farm is an option for elimination of PRRS in breeding herd. Adoption of strict biosecurity measures is essential. The objective of this study was to eliminate the PRRS from a farrow-to-finish small pig farm (130 breeding pigs) by serum inoculation. The owner was acquainted with the biosecurity measures (strict biosecurity protocols and herd closure for at least 200 days). Breeding pigs were immunized with serum obtained from weaners. The number of high positive breeding pigs decreased from six months after the II. serum inoculation till the end of the study, but the prevalence of antibody were almost the same comparing the sampling before serum inoculation to last sampling 13 months after the II. serum inoculation. The breeding herd were free of virus during all testing, but PRRSV circulated in the two-month old weaners. The owner did not implement herd closure and other required biosecurity measures and a new strain of PRRSV was introduced. Hence, serum inoculation proved to be unsuccessful for the elimination of PRSS from the farrow-to-finish farm. Implementation of biosecurity measures in field conditions is a much more difficult challenge than what was expected at the beginning.

• 出版日期2013