Parasitology — Flashcards

Flashcard 151: Schistosoma _____ has a small inconspicuous lateral spine (knob)

Answer: japonicum

Extra: Morphology of Schistosoma eggs: • **S. haematobium**: Large terminal spine. • **S. mansoni**: Large lateral spine. • **S. japonicum**: Small, inconspicuous lateral spine (often appears as a knob).

Flashcard 152: _____ in stool is diagnostic of Giardia infection

Answer: Trophozoites

Flashcard 153: The _____ stage is never seen in the peripheral smear of Plasmodium falciparum malaria.

Answer: schizont

Flashcard 154: Entamoeba histolytica has two stages: an infective _____-nuclei cyst stage and a(n) invasive trophozoite stage.

Answer: 4

Flashcard 155: Helminths whose eggs float in a saturated salt solution can be remembered by mnemonic: THE FAN:T_____Hymenolepis nanaEnterobius vermicularisFertilized eggs of Ascaris lumbricoidesAncylostoma duodenaleNecator americanus

Answer: richuris trichiura

Flashcard 156: Non-Bile stained eggs can be remembered by the mnemonic **A HEN**: _____, Hymenolepis nana, Enterobius vermicularis, Necator americanus

Answer: Ankylostoma duodenale

Flashcard 157: _____ is a helminth that can cause intestinal obstruction at the ileocecal valve

Answer: Ascaris lumbricoides

Flashcard 158: _____ is a helminth known as 'African eye worm', as the adult form can migrate across the conjunctiva

Answer: Loa loa

Flashcard 159: What tests (3) are used to diagnose Entamoeba histolytica?_____; ELISA stool+serum antigen test; Serology to detect Entamoeba antibodies

Answer: Stool O&P (ova and parasites)

Flashcard 160: Giardia lamblia cysts become trophozoites in the _____ when stimulated by gastric acid after ingestion.

Answer: duodenum