Classical swine fever (CSF) is the enemy that harm for swine industry in our country. Epidemic characteristics produced apparent change in strong immune pressure and various environmental changes under the influence of CSF in recent years. It is difficult to clinical diagnosis and prevention because CSF and other diseases caused by mixed infection that lead to pathological changes and clinical symptoms become more and more complex. The kind of pig CSFV sustained virus infection is the most headaches, it not...
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