Intestinal Nematodescontinued Clinical Microbiology Review 248
NEMATODE ROUTE OF INFECTION DIAGNOSTIC STAGE OTHER
Strongyloides stercoralis Threadworm. Larval migration through
lungs. Duodenal aspirates and/or En-
terotest may help Dx. Eosinophilia. Can
disseminate & be fatal in immunocom-
promised. Infectious to laboratorians.
Must differentiate from hookworm
larvae.
Skin penetration by filariform
larva. Sexual transmission.
Autoreinfection.
Rhabditiform larvae. 200–250 μm
long × 16 μm in diameter. Short
buccal cavity. Large bulb in esopha-
gus. Prominent genital primordium.
(From Leventhal R, Cheadle RF. Medical Parasitology: A Self-
Instructional Text, 5th ed. Philadelphia: FA Davis; 2002:24.)
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