PRRS varkens virus antistoffen


Sterksel 2.5 years free of PRRS virus

Gepubliceerd op
14 juli 2015

By working according to established protocols Sterksel has been free of PRRS virus over a 2.5 year period. That's an interesting performance because the WUR Swine innovation centre receives annually 7000-10000 visitors, so the risk of infection is higher than a regular company. The companies Swine veterinary practice “De Varkenspraktijk” and Sterksel decided to continue on this path and to motivate others to work under these protocols.

PRRS symptoms in the stable

If a pig comes into contact with the PRRS virus, there are created antibodies. These antibodies were not detected over a period of 2 years at the finishers of 10, 16 and 24 weeks of age. For this reason, along with the fact that no clinical symptoms were observed in the stable, it is likely that there has been no field PRRS virus on the company for 2 years. In the last sampling (May 2015) again antibodies were found in the pigs of 24 weeks. The gilts and sows are vaccinated at the age of 30 weeks, the sows in the first week after farrowing and on day 60 of gestation.

Roadmap with three paths

The vision of Sterksel and the Swine veterinary Practice is that a pig farm should aim to reduce infection risks. A roadmap was designed to become a PRRS-free farm. This roadmap has the following paths, which need to be walked simultaneously:

Internal biosecurity

Intensive separation of animal categories:

  • Keep litters together as much as possible
  • Work with hygienic blocks (groups)
  • Work with different colours per group (clothing, footwear, equipment)
  • Good quarantine and adaptation of the gilts (convenient located at the farm)

Characteristics of the farm:

  • Special attention to hygiene and handling of animals (checklist Streptococcus Suis)
  • Cleaning and disinfection has been optimized
  • Floors were coated

Hospital for ill animals:

  • Hardly used, an animal must be slaughtered worthy
  • Never replace a sick animal into the farm

Euthanasia Policy:

  • Animal that can’t be slaughtered euthanize worthy

External biosecurity


  • Trucks are clean when they arrive at the farm
  • Sows are going on transport at the company's exit
  • Animals that have been on the truck can never return to the company
  • (Preferably heat treatment (proven effective against PRRS) )

Arrival of animals:

  • Choose for PRRS-free animals for herd replacement
  • Arrival at young age (10-16 weeks)

Quarantine / adaptation
Separation clean and dirty way

Procedures (protocols)

Production system:

  • 3-week production system


  • Sows and breeding gilts are vaccinated with a live vaccine (Porcilis PRRS)
  • Piglets are vaccinated against Mycoplasma (Mycoflex), Circo (CircoFLEX) and PIA (Enterisol ileitis)


  • Coaching and training in correct use and application of veterinary medicines
  • Apply strict of hygienic rules among animal groups
  • Cleaning and disinfection according to protocol
  • Development of a Streptococcus checklist

The maquette demonstrates how a PRRS-contamination can be dealt with on a company

demonstratie maquette.jpg