目的对福建省北部一重症感染粪类圆线虫病例的虫卵与虫体进行形态与大小的检测。方法取患者的胃粘膜病理切片、胃肠呕吐物、引流物、尿液在显微镜下观测并摄影。结果在上述标本中检及粪类圆线虫的虫卵、杆状蚴、丝状蚴与雌成虫。虫卵的大小,长为70.42μm,宽44.24μm,卵内含胎胚或幼虫;卵有单个的,也有成串的。因直接与间接自身感染,虫卵、杆状蚴及丝状蚴数量成千累万。成虫均为雌虫,平均体长2236.55μm,宽27.25μm,尾端钝并稍膨大,服阿苯哒唑400mg/d后,排出雌虫累以千计。结论寄生人体的粪类圆线虫的虫卵大小为70.42μm×44.24μm;雌虫食道长,占体长1/3,尾端形状钝并稍膨大;未发现雄成虫。上述结果纠正了有关文献虫卵大小为50～58μm×30～34μm;雌虫食道占虫体2/3、尾部尖及曾在人体发现雄虫的错误。 Objective To detect the morphology and size of eggs and parasites in a critically infected case of stool nematode in northern Fujian Province. Methods Gastric mucosa biopsy, gastrointestinal vomit, drainage and urine were observed under microscope and photographed. Results The eggs of C. elegans, rod-shaped larvae, filamentous larvae and female adults were examined in the above specimens. Egg size, length of 70.42μm, width 44.24μm, eggs contain fetal embryo or larvae; eggs have a single, but also a string. Due to direct and indirect infection, the number of eggs, rod-shaped larvae and filamentous larvae of millions of millions. Adults were females, the average body length 2236.55μm, width 27.25μm, blunt tip and slightly swollen, serving albendazole 400mg / d, exhausted thousands of females. Conclusion The size of eggs of C. helminthis was 70.42μm × 44.24μm. The length of esophagus was 1/3, and the shape of the tail was obtuse and slightly swollen. The male adults were not found. The above results correct the size of the eggs in the literature 50 ~ 58μm × 30 ~ 34μm; female esophagus accounts for 2/3 of the worms, caudal tips and males have been found in the human body error.