Chicks at 1-day of age were vaccinated with L2 strain and original S1133 strain separately.

 
  • 選擇L2擴增后與原毒S1133株同時(shí)免疫1日齡雛雞;免疫后15天腳墊攻擊雞呼腸弧強毒S1133株.;攻毒后20天。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan