Strongyloides stercoralis

Strongyloides stercoralis. First-stage (rhabditoid) larva (iodine stain, high power). This rhabditoid stage larva is the diagnostic stage for strongyloidiasis. The larva measures 180 to 380 mm by 14 to 20 mm. It has a short, tubular, buccal canal. The genital primordium is a permanent and characteristic feature; it lies between the midpoint of the intestine and the ventral body wall.