One week after the final immunization all treatment groups were challenged with 130 infective T. spiralis muscle larvae.

• 最后一次免疫后间隔1周每鼠攻击感染130条感染性肌幼虫,攻击感染后1周剖检成虫、新生幼虫,攻击感染后35天剖检肌幼虫。