Porcilis-PRRS.com quiz

Take our quiz to test your general knowledge about PRRS in pigs. Links are provided to help you with the answers!

  1. The primary target cell in the pig of the PRRS virus is:
    I don't know
    the alveolar macrophages
    the pneumocyte II cells
    the tracheal epithelium


  2. Pigs infected with PRRSV are viraemic within:
    I don't know.
    2 hours after infection.
    12 hours after infection.
    2 days after infection.


  3. What is the ORF 5 sequence of the PRRS virus used for?
    I don't know.
    To monitor PRRSV strains present on a farm over time, to differentiate between resident and newly introduced viruses and between vaccine and field strains.
    To determinate the properties of PRRSV (virulence, antigenic similarity, vaccine efficacy).
    It does not offer any useful information. Only ORF 7 is useful.


  4. Homologous immunity:
    I don't know.
    only protects against clinical signs.
    is found between strains with an ORF 5 homology 95%.
    is also protective against infection.


  5. In some European Countries the North American (NA) serotype of PRRSV is also present. What is the reason for this?
    I don't know.
    The strain is native to Europe.
    The NA strain has an ORF 5 homology with the EU strain of at least 85%.
    It was probably introduced in 1996 through the use of a live attenuated PRRSV vaccine.


  6. The IDAL injector administers the vaccine:
    I don't know.
    intradermally with an average velocity of 92 m/s.
    intramuscularly.
    intradermally, but only in sows.


  7. The efficacy of PRRS vaccination in finishing pigs is assessed:
    I don't know.
    By PCR tests to demonstrate the eradication of the PRRSV infection.
    By measuring ADG, FCR, antimicrobial treatments and mortality rate.
    By ELISA tests to verify seroconversion after vaccination.


  8. Which disease synergy with PRRS virus causes the worst performance loss?
    I don't know.
    Erysipelas
    B. bronchiseptica
    M. hypneumoniae


  9. Laboratory trials by Labarque (1999) and Woensel (1998) showed which reduction in PRRS viraemia following administration of Porcilis PRRS vaccine?
    I don't know.
    85%
    100%
    72%


sow