Parasitology — Flashcards

Flashcard 241: Which parasite's egg is characterized as being large, ovoid, operculated, and bile-stained?

Answer: Fasciola hepatica

Extra: Note: Fasciolopsis buski (intestinal fluke) eggs are morphologically indistinguishable from Fasciola hepatica (liver fluke) eggs.

Flashcard 242: No nuclei in the tail region are seen in _____

Answer: Wuchereria bancrofti (helminth)

Flashcard 243: Larva currens (meaning racing larvae ) is the rapidly progressing serpiginous urticarial tracks caused by migrating filariform larvae of _____

Answer: Strongyloides

Flashcard 244: What is the most common intestinal protozoan parasite?

Answer: Giardia lamblia

Flashcard 245: Which organism is the causative agent of **scabies**, typically presenting with nocturnal pruritus and cutaneous burrows?

Answer: Sarcoptes scabiei

Extra: Sarcoptes scabiei is an ectoparasite (mite) that burrows into the stratum corneum of the skin. - **Clinical features:** Nocturnal pruritus, burrows (pathognomonic) in finger webs, wrists, and genitalia. - **Treatment:** Permethrin 5% cream (Drug of Choice) or oral Ivermectin.

Flashcard 246: What form is most commonly seen on peripheral blood smear in Babesia?_____

Answer: Ring form

Flashcard 247: _____ dye test is gold standard for the diagnosis of toxoplasmosis

Answer: Sabin Feldman

Flashcard 248: The infective form of Entamoeba histolytica is the _____.

Answer: quadrinucleate cyst

Flashcard 249: Schizonts and gametocytes are _____ in Babesiosis

Answer: absent

Flashcard 250: For both Brugia malayi and Wuchereria bancrofti, the infective form to man is _____ larva.

Answer: third stage filariform