指状腹腔丝虫与马来丝虫的蜡肠期幼虫除尾部有无尾核可作区分依据外,前者头小,基部国钝呈圆锥状,小尾尖细如钉。感染前期幼虫的大小、食道长短和尾部形态也有区别。指状腹腔丝虫感染期幼虫尾端有3个刺状小乳突,排列如山字形,食道平均占体长3/4,肛比率小于3,而马来丝虫感染期幼虫尾端的3个乳突较大,呈瘤状,食道仅占体长的1/3,肛比率约为4。 Polioperitoneal larvae and Malayan filarial larvae in addition to tail caudal nucleus can be used as a basis for distinction, the former is small, basally blunt conical, small tail as thin as nail. Pre-infection larvae size, esophageal length and tail morphology are also different. Three thorn spiny papillae were found at the caudal end of larvae of peritoneal filarial infection, which were arranged in the shape of a mountain. The average length of the esophagus was 3/4, the anal ratio was less than 3, while the three larvae Suddenly larger, tumorous, esophagus only 1/3 of body length, anal ratio is about 4.