2 bytes removed ,  17:40, 8 March 2011
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Affected animals often recover, but have a low feed conversion ratio for sometime.
 
Affected animals often recover, but have a low feed conversion ratio for sometime.
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There are three outcomes to infection; the animal may:  
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There are three outcomes to infection; the animal may: die, recover or become chronically infected.
 
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Die, recover or become chronically infected.
      
 
 
 
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