[名词解释] 幼虫移行症larva migrans

机会性致病寄生虫opportunistic parasite 隐性感染suppressive infection 异位寄生Ectopic parasitism 辙叉由翼轨和心轨组成，翼轨的始终端称为辙叉（）。 ["A、前趾后趾","B、趾端跟端","C、岔前岔后","D、岔尖岔尾"] 免疫逃避immune evasion 幼虫移行症larva migrans