Worms Flashcards
What is the transmission and morphology of Ascaris lumbricoides?
Fecal-oral; Eosinophil inflammatory rxn that will obstruct intestine or biliary tree.
Discuss the pathogenesis of Ascaris lumbricoides
Ingested eggs hatch in intestine, larvae PENETRATE mucosa, migrate from splanchnic circulation to systemic, cause liver absesses
Discuss Ascaris pneumonitis
Larvae migrate up trachea, then swallowed, mature in intestines
How is Ascaris Lumbricoides treated? Diagnosed?
Stool exam, Passage of Worms
Albenazole.
What is the transmission and morphology of Strongloides?
Infection causes peripheral eosinophilia.
Does not require ova or larval stage outside of human host.
What are the symptoms of Strongyloides?
Cough, Wheezing (worse w/ steroids), Epigastric Pain (worse w/ eating)
How is Strongloides diagnosed? Treated?
Stool culture; Ivmectin even if asymptomatic
What are the symptoms of Necator americanus/ Ancylostoma duodenale?
Iron-deficiency anemia and malnutrition
Discuss the pathogenesis of Necator americanus/ Ancylostoma duodenale.
Larvae penetrate the skin, travel in blood to lungs, migrate up trachea, swallowed in attach in intestines, suck blood and reproduce.
Discuss the pathogenesis of Enterobius vermicularis
Adult worms migrate to anal orifice and lay eggs at night.
What are the symptoms of Enterobius vermicularis? Diagnosis? Treatment?
Perianal pruritus; Scotch tape test, albenazole
What is the distinguishing symptom of Trichuris Trichuria?
Rectal prolapse
What are the symptoms of Schistosomiasis? Treatement?
Portal hypertension, bloody diarrhea and seizures; Praziquantel
Important facts about Tapeworms, symptoms and treatment
Dont invade mucosa or cause peripheral eosinophilia. Passing proglottidis; Praziquantel
Name the Tapeworms
Diphyllobothrium latum-Fish tapeworm
Taenia solium- Pig tapeworm
Hymenolepsis nana- dwarf tapeworm
