STRONGYLOIDIASIS Strongyloides stercoralis(Bavay, 1876) Styles and Hassall, 1902. To confirm the diagnosis of strongyloidiasis, it is necessary to examine the stool to trace the presence of larvae (especially rhabditiform), either by direct examination of the stool or by Harada Mori culture. EggS. stercoralisIt is difficult/rare to find because it usually hatches into rhabditiform larvae while still in the rectum (still in the intestinal mucosa). Rhabditiform Larvae: - length 200 – 400 µ, diameter 16 – 18 µ; - short buccal cavity, small in diameter, only visible as a thin line; - esophagus length compared to larval body length ± 1 : 3; - the posterior part of the esophagus is narrowed due to the nerve ring and on the anal (posterior) side the narrowing of the esophagus is shaped like a bulb→ esophageal bulb; - the genital primordium is relatively clear, located ± in the middle of the intestine. Filariform Larvae: - length 400 – 700 µ, diameter 12 – 20 µ; - long slim shape; - very similar to the filariform larvae of hookworms, only here the esophagus is relatively longer, ± ½ the length of the bodyn - no esophageal bulbs; - notched tail tip. Free-living Adult Worms: - ♂: has a length of 0.7 – 1 mm; diameter 40 – 50 µ, rhabditoid, wide fusiform; tail pointed & curved vent - ♀: measuring ± 1- 1.7 mm long, 50 – 70 µ wide; fat, rhabditoid body, completely filled with eggs that occupy most of the body.