微丝蚴随血液循环，不同种属在临床症状上稍有不同，但是它们均由蚊子传播。这些微丝蚴是班氏吴策线虫（斑氏丝虫）的幼体。
Here are microfilaria. These tiny worms circulate in the bloodstream. There are several species with slightly different clinical characteristics, but they are spread by mosquitos. These microfilaria happen to be Wuchereria bancrofti.
