猪有齿冠尾线虫主要的寄生部位是（）。
A.肝管和胆管
B.肠系膜静脉
C.结肠
D.十二指肠
E.肾脏
参考答案：E
解析：
猪肾虫病是由冠尾科、冠尾属的有齿冠尾线虫寄生于猪的肾盂、肾周围脂肪和输尿管壁等处引起的一种寄生虫病。临诊特征表现为病猪出现后肢无力，跛行，走路时后躯左右摇摆。尿液内常有白色黏稠的絮状物或脓液。因此，猪有齿冠尾线虫主要的寄生部位是肾脏。
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