ASCP Parasitology Exam Questions And Answers

What is the diagnostic procedure for Echinococcus granulosus? - Answer- The microscopic examination of hydatid fluid aspirated from a cyst. What is the diagnostic procedure for Onchocerca volvulus? - Answer- Examination of skin snips. What is the diagnostic procedure for Schistosoma haematobium? - 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? - Answer- Eosinophils. How is Trypanosoma brucei rhodesiense transmitted? - Answer- By the bite of the tsetse fly. Infection with Giardia lamblia is often associated with: - Answer- Ingestion of water contaminated with cysts. Upon examination of stool material for Cystoisospora belli, one would expect to see: - Answer- Oocysts that are modified acid fast variable. What is the best technique to identify Dientamoeba fragilis in stool? - Answer- Trichromatic stained smear. Because there is no known cyst form for Dientamoeba fragilis. Entamoeba gingivalis - 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? - Answer- Naegleria fowleri. What are the characteristics of the rhabditiform-noninfective-larvae of Strongyloides stercoralis? - Answer- Short buccal capsule and large genital primordium. Visceral larva migrants is associated with what parasitic organism? - 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? - Answer- A condition in humans caused by the migratory larvae of certain nematodes, humans being a dead end host. These n