无夹杂症的粪类圆线虫病一般是小肠轻度感染。诊断粪类圆线虫病通常是从粪便中查到典型的杆状蚴。杆状蚴如果排出延缓,可在宿主肠内发育成丝状蚴,并通过肠壁进入血流,而后又象感染期幼虫的正常生活循环那样,经过移行回到肠内,这就是自体感染的过程。如果感染性幼虫很多,在向肺部移行过程中一部分幼虫可侵入各种器官,引起强烈的变态反应。幼虫在肺内可导致急性肺炎。如果肠内细菌伴随丝状蚴进入血流,自体感染 The omnivorous gonococcal disease is usually a mild infection of the small intestine. Diagnosis of Staphylococcus neoformans is usually found in feces from the rod-shaped larvae. Rod larvae, if excreted, develop into filamentous larvae in the host intestine and enter the bloodstream through the intestinal wall, then migrate back into the intestine as the normal life cycle of the infected larvae, which is the result of autologous infection process. If there are many infective larvae, part of the larvae can invade various organs during the migration to the lungs, causing a strong allergic reaction. Larvae can cause acute pneumonia in the lungs. If the intestinal bacteria along with filarial larvae into the bloodstream, self-infection