The ETB-2 was given by drenching after being implanted 24 hours, while control groups were given saline water.

 
  • 采用接种后24小时灌胃给药,ETB-2A、ETB-2B、ETB-2C分别为39/kg/d、4.;58/kg/d、6g/kg/d,对照组则以生理盐水灌胃。
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