Many commercial attenuated vaccines derived from local IBV field isolates have been used to control IBV in China besides Massachusetts serotype vaccines H120 and H52 that were imported.

　
英 美
  • 我國在防制雞傳染性支氣管炎過(guò)程中,目前通常采用馬薩諸塞(Massachusetts)血清型疫苗H120,H52,還有許多由地方分離株通過(guò)雞胚致弱制備的商品化活疫苗。
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