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*Piglets from non-immune sows are predisposed.   
 
*Piglets from non-immune sows are predisposed.   
 
*Skin trauma, such as due to fighting, allowing entry of infective organisms is also considered a risk factor in this disease.
 
*Skin trauma, such as due to fighting, allowing entry of infective organisms is also considered a risk factor in this disease.
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===Pathology===
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[[Image:f00348.jpg]]
    
===Pathogenesis===
 
===Pathogenesis===
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