ASCP Parasitology Exam| 105 QUESTIONS| WITH COMPLETE SOLUTIONS

What is the diagnostic procedure for Echinococcus granulosus? Correct Answer: The microscopic examination of hydatid fluid aspirated from a cyst. What is the diagnostic procedure for Onchocerca volvulus? Correct Answer: Examination of skin snips. What is the diagnostic procedure for Schistosoma haematobium? Correct Answer: Examination of urine sediment. Charcot-Leyden crystals in stool may be associated with an immune response and are thought to be formed from the breakdown products of what cell? Correct Answer: Eosinophils. How is Trypanosoma brucei rhodesiense transmitted? Correct Answer: By the bite of the tsetse fly. Infection with Giardia lamblia is often associated with: Correct Answer: Ingestion of water contaminated with cysts. Upon examination of stool material for Cystoisospora belli, one would expect to see: Correct Answer: Oocysts that are modified acid fast variable. What is the best technique to identify Dientamoeba fragilis in stool? Correct Answer: Trichromatic stained smear. Because there is no known cyst form for Dientamoeba fragilis. Entamoeba gingivalis Correct Answer: Known to be an inhabitant of the mouth and is characterized by morphology that resembles Entamoeba histolytica/E.dispar. However, Entamoeba gingivalis tends to ingest P.M.N's whereas Entamoeba histolytica/E.dispar does not. What organism causes primary amoebic meningoencephalitis? Correct Answer: Naegleria fowleri. What are the characteristics of the rhabditiform-noninfective-larvae of Strongyloides stercoralis? Correct Answer: Short buccal capsule and large genital primordium. Visceral larva migrants is associated with what parasitic organism? Correct Answer: Toxocara. Toxocara species are the cause of visceral larva migrants and occur when humans accidentally ingest the infective eggs of the dog or cat ascarid. The larvae migrate through the deep tissues, including the eye. What are visceral larva migrans? Correct Answer: A condition in humans caused by the migratory larvae of certain nemato