Strongyloides stercoralis (continued)
OVA
Rarely seen; similar to Hookworm species eggs; may contain a larva.
ADULT
SIZE
MALE: Less than 1 mm; seen only in free living cycle.
FEMALE: 1 mm for the free living; 2 mm for the parasitic.
SHAPE: Very slender, threadlike, male has a curved tail.
COLOR: Colorless; semitransparent.
BUCCAL STRUCTURES: Short buccal cavity.
COPULATORY BURSA: Absent.
SPICULES: Two.
RHABDITIFORM LARVA
SIZE: 250 mcm.
BUCCAL CAVITY: Short.
GENITAL PRIMORDIUM: Large and conspicuous.
TAIL: Short and stubby.
Figure 4-18. Stages of Strongyloides stercoralis.
MD0842
4-25
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