Diagnostic Findings [Last Modified: ]
Strongyloidiasis
[Strongyloides stercoralis]
Causal Agent Life Cycle Geographic Distribution Clinical Features Laboratory Diagnosis Treatment

Microscopy

Rhabditiform larvae of Strongyloides stercoralis in wet mounts after fixation in formalin 10%.  Diagnostic characteristics: length 200 to 250 µm (up to 380 µm), short buccal cavity, and prominent genital primordium.

Strongloides stercoralis larva
A

A: The prominent genital primordium in the mid-section of the larva (black arrow) is readily evident.  Note also the Entamoeba coli cyst (white arrow) near the posterior end of the larva.

Strongyloides stercoralis larva
B

B: The rhabditoid esophagus is clearly visible in this larva; it consists of a club-shaped anterior portion, a postmedian constriction, and a posterior bulb.
Back Top