The fifteen newborn SPF(Specific Pathogen Free)piglets obtained by caesarean operation were randomly divided into three groups.

 
  • 通過(guò)無(wú)菌剖腹產(chǎn)獲取15頭無(wú)特定病原菌(specific pathogen free,SPF)仔豬,隨機分為三組。
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