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选用20g健康小鼠35只,分成7组,每组5只,每鼠感染旋毛虫幼虫300条,然后在感染后的不同时
Twenty-five healthy mice (20g) were randomly divided into 7 groups (n = 5 in each group). Each mouse was infected with 300 Trichinella spiralis larvae and then infected at different times