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Parasitology Final Exam Review Questions And Answers
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Parasitology Final Exam Review Questions And Answers If fecal specimens are to be preserved for the preparation of permanent slides, what would be the preservative of choice? PVA (Polyvinyl Alcohol) Which specimen is the LEAST likely to provide recovery of Trichomonas vaginalis? feces In wha...

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  • October 20, 2024
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  • 2024/2025
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Parasitology Final Exam Review Questions
And Answers

If fecal specimens are to be preserved for the preparation of permanent slides, what would be the

preservative of choice? PVA (Polyvinyl Alcohol)




Which specimen is the LEAST likely to provide recovery of Trichomonas vaginalis? feces




In what suspected condition should a wet prep using a warm slide be examined? Amoebic

meningoencephalitis




An unpreserved fecal specimen has been accidentally left at room temperature in the laboratory

overnight. Upon examination the next day, you find many motile "larvae" which measure about

250 and have short buccal capsules and prominent genital primordium, but no ova are found.

Identification of this organism is: Strongyloides stercoralis, rhabditiform larva




The use of the trichrome stained smear in parasitology is advantageous in that it best

demonstrates the details of the _________ stage which may not be seen as easily in other

microscopic preparations trophozoite




Which of the following animals acts as a reservoir of infection of Balantidium coli? pigs

, Parasitology Final Exam Review Questions
And Answers

A cyst of Iodamoeba butschlii would typically show: a glycogen mass




Bloody, diarrheic stools would most likely contain which of the following parasites?

Entamoeba histolytica




The most characteristic feature of Endolimax nana it its: blot-like nucleus and clear

cytoplasm




Organisms that should be considered in a waterborne outbreak of diarrheal disease include:

Giardia lamblia and Cryptosporidium parvum




Which of the following is the BEST technique to identify Dientamoeba fragilis in stool?

Trichrome stained smear




Eye infections with Acanthamoeba spp. have most commonly been traced to: use of

contaminated lens cleaning solutions

, Parasitology Final Exam Review Questions
And Answers
A host in which a parasite does not reach its sexual maturity and reproduction is a/an

Intermediate host




Macroscopic examination of unpreserved, fresh stool specimens involves briefly looking for:

mucus, blood, adult worms




Permanent stained smears CANNOT be made from: formalin preserved specimens




A patient presented with the following symptoms: mild gastrointestinal complaints, vitamin A

deficiency, and steatorrheal (fat in stool) stool specimens. Five stool specimens were submitted

within two weeks. All O and P exams were reported negative. Select the next most appropriate

step: request a duodenal aspirate for parasitic exam




Motile protozoan trophozoites initially seen in wet preps should not be reported as positively

identified until they are similarly viewed on permanently stained smear True




Blastocystis hominis is: a protozoan that has a large, fluid filled vacuole surrounded by

one to several nuclei

, Parasitology Final Exam Review Questions
And Answers
Blastocystis hominis is a: protozoan




Schizogony is: asexual reproduction by multiple fission




Cryptosporidium sp. is most similar to what other organism? Isospora belli




Which constitutes the MOST important preventative measure to decrease the incidence of

parasitic disease? improved public sanitation




What stain is BEST used to identify Isospora belli? modified acid fast




An 85-year-old woman was admitted to the hospital with abdominal cramps and diarrhea of

approximately one week's duration. She appeared cachectic and severely dehydrated and gave a

history of eating poorly for several months prior to the onset of the above symptoms. The direct

wet prep of her fecal specimen revealed an oval ciliated trophozoite measuring approximately 90

microns and containing a funnel shaped cytostome and a kidney-shaped nucleus. Other

inclusions were not visible. This organism is identified as: Balantidium coli

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