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FAQ
 

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        Circovirus-Associated Disease 

    Q: Why is it that many pigs are infected with PCV2 virus, but not many have 
         disease from the virus?

    A:  Many studies have demonstrated porcine circovirus requires a "trigger factor" 
         for it to cause disease.  Trigger factors may be infectious, management practices, 
         genetic predisposition or immune stimulation.  To cause disease, it is best if the trigger 
         factor affects the pigs around the time of infection with PCV2.


          Circovirus Vaccine

     Q:  Is it better to vaccinate sows or piglets with PCV2 vaccines?  
     A:  That depends on your goal.  If your goal is to stabilize the sow herd and reduce 
           virus shedding by sows to piglets, sow vaccination may be helpful.  However, if you have 
           clinical signs of PCVAD in pigs in the grower/finisher, a piglet vaccine administered 
           several weeks prior to PCV2 infection may be a better choice. Sow vaccination
           may not protect pigs later in the grow-finish stage. 


           Circovirus Management and Control

    Q:  What disinfectant can I use to remove PCV2 from my nursery?
    A:  Several disinfectants are labeled for use against circovirus. Effective disinfectants 
          include Virkon® S, sodium hydrozide, Roccal® D Plus, Clorox® bleach,  
          1-Stroke Environ®, Fulsn® and Tek-Trol®.1

    Q:  How can I reduce risk of PCV2 losses, regardless of whether I can find  
          enough vaccine for my herd?
    A:  A better understanding of porcine circovirus associated disease (PCVAD) will 
          help identify management steps to reduce impact of the disease, as well as lead 
          to new methods to avoid infection. Fort Dodge is partnering with universities, swine 
          consultants and industry leaders to improve our combined understanding of PCVAD,  
          through this effort educational materials and management strategies will be  
          provided to the Pork Industry.

Reference
1. Royer R, Nawagitgul P, Halbur P, Paul P. Susceptibility of porcine circovirus type 2 to commercial and laboratory disinfectants. J Swine Health and Prod 2001;9(6):281-84.


 
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