Intestinal Nematodes - STRONGYLOIDES STERCORALIS

Question 1

Strongyloidiasis

Cochin China diarrhea

soil transmitted helminth

FACULTATIVE parasites

Only helminth that cause GREATER PATHOLOGY in AIDS patients

Answer 1

Strongyloides stercoralis

• SMALL intestine
• skin penetration by filariform larva (L3)

Question 2

Diagnostic test for Strongyloides stercoralis

Answer 2

Harada-Mori culture

• LARGE genital PRIMORDIUM and POINTED TAIL
• Rhabditiform (L1)

Question 3

Pathogenesis of Strongyloides stercoralis

Answer 3

Larvae penetrate intestinal wall directly without leaving host and migrate to the lungs (AUTOINFECTION)

Question 4

Spectrum of Disease (Strongyloides stercoralis)

Answer 4

cutaneous phase

• ground itch
• serpiginous track

lung phase
*coughing, wheezing, hemoptysis

intestinal phase

• mild watery diarrhea
• duodenitis

disseminated strongyloidiasis
*hyperinfection syndrome

Question 5

Treatment for Strongyloides stercoralis

Answer 5

Ivermectin