粪类圆线虫感染的潜伏期可长达36年。粪类圆线虫感染多数无临床症状而常见嗜酸粒细胞增多。在免疫力不全者则可出现许多严重症状如恶心、呕吐、腹泻、发热、失水,以及由于肠粘膜溃疡引起革兰氏阴性菌败血症,甚至造成死亡。粪类圆线虫幼虫在肠内发育到感染性丝状蚴阶段就会造成大量自身感染。这些幼虫穿过盲肠,移行到肺,发育成熟后通过食道又回到十二指肠。粪类圆线虫虽然移行到肺,但在一般情况下引起的肺部 Stool nematodes infection incubation period of up to 36 years. Staphylococcus neoformans infection most clinical symptoms and no common eosinophilia. Many people with immune deficiency can experience many serious symptoms such as nausea, vomiting, diarrhea, fever, dehydration, and sepsis caused by gram mucosal ulceration, resulting in death. Stool nematode larvae in the intestine to infective filamentous stage will cause a large number of their own infection. These larvae pass through the cecum, migrate to the lungs and, when mature, return to the duodenum through the esophagus. The stink bug does migrate to the lungs, but in the general case it causes the lungs