Stongyloides stercoralis Flashcards
Strongyloides stercoralis is non-zoonotic (T/F)
FALSE!!!!
-Strongyloides stercoralis is a ZOONOTIC Nematode
What are the definitive hosts of Strongyloides stercoralis?
- Humans
- Dogs
What is the geography of Strongyloides stercoralis?
- Asia
- Africa
- tropical America
- Southern USA
What is characteristic of Strongyloides stercoralis?
- May be parasitic or free living
- Usually occurs in children
- Only species with larvae in fresh feces
How is Strongyloides stercoralis transmitted?
-Skin penetration of L3 larvae to host
Describe the life cycle of Strongyloides stercoralis.
Few larvae (not eggs) transmitted in feces can mature in environment w/o host from L1->L3.
- Larvae undergo Hepatic tracheal migration.
- PPP – 4 Weeks;
- eggs can hatch in utero = viviparous
What are the clinical symptoms of Strongyloides stercoralis?
cutaneous and intestinal:
Acute: itchy at penetration site, cough and wheeze, upper abd pain, diarrhrea, weight loss from malabsorption (compare to Giardia lamblia)
What are the definitive hosts of Strongyloides stercoralis?
- Humans
- Dogs
What is the geography of Strongyloides stercoralis?
- Asia
- Africa
- tropical America
- Southern USA
What is characteristic of Strongyloides stercoralis?
- May be parasitic or free living
- Usually occurs in children
- Only species with larvae in fresh feces
How is Strongyloides stercoralis transmitted?
-Skin penetration of L3 larvae to host
Describe the life cycle of Strongyloides stercoralis.
Few larvae (not eggs) transmitted in feces can mature in environment w/o host from L1->L3.
- Larvae undergo Hepatic tracheal migration.
- PPP – 4 Weeks;
- eggs can hatch in utero = viviparous
Strongyloides stercoralis autoinfection from L3 larvae can reinfect the same individual for decades
Strongyloides stercoralis autoinfection from L3 larvae can reinfect the same individual for decades
What is larva currens caused by Strongyloides stercoralis?
Clinical symptom of Strongyloides stercoralis
- Raised wiggly in thoracic area that lasts a few hours
- very puritis (itchy) (vs. A.brazilense, A. caninum)
How would one directly diagnose Strongyloides stercoralis?
- Stool microscopy/culture (few eggs produced)
- ELISA
