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Parasitology > Parasitology Exam 1 > Flashcards

Parasitology Exam 1 Flashcards

(77 cards)

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1
Q

What is essential for a complete and accurate fecal examination for ova and parasites?

A

Permanent stained slide

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2
Q

What is a key characteristic of the thick blood slide?

A

RBCs must be laked during or before Giemsa stain

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3
Q

What may be necessary to diagnose infection with Paragonimus spp.?

A

Examination of sputum

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4
Q

Is collection of a single stool sufficient for the O&P?

A

False

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5
Q

Which specimen is most likely to provide recovery of Trichomonas vaginalis?

A

Vaginal discharge

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6
Q

What is matched with free living amebae?

A

CSF examination

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7
Q

What is matched with fecal concentration?

A

Sedimentation method

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8
Q

What is matched with Leishmaniasis?

A

Impression smears

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9
Q

What is matched with amebiasis?

A

Sigmoidoscopy examination

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10
Q

What is matched with Trichrome?

A

Permanent stain for fecal specimens

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11
Q

What is matched with pinworm?

A

Cellophane (scotch tape) preparation

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12
Q

What is matched with 10% formalin?

A

A fecal fixative used in O&P examination

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13
Q

What is matched with Trichinella spp.?

A

Examination of biopsy specimen

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14
Q

What is matched with microsporidia?

A

Modified trichrome stain

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15
Q

What is matched with Cryptosporidium spp.?

A

Modified acid-fast stain

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16
Q

Is it mandatory to thoroughly mix the stool specimen with the fixative when using fecal fixatives?

A

True

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17
Q

What are the most relevant diagnostic tests for the recovery and identification of babesia spp.?

A

Thick and thin blood

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18
Q

Is Ascaris lumbricoides one of the more common intestinal nematodes?

A

True

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19
Q

Is parasitic serology for antibody detection critical for the diagnosis of intestinal protozoa?

A

False

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20
Q

Should six sequential fecal specimens be examined for the presence of any intestinal parasites?

A

False

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21
Q

Which of the following is the best technique for identifying Dientamoeba fragilis in stool?

A

Trichrome-stained smear

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22
Q

Which protozoan organism has been widely impacted in waterborne and foodborne outbreaks in the United States?

A

Giardia duodenalis

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23
Q

An entamoeba histolytica trophozoite has which characteristics?

A

Central karyosome in the nucleus and clear pseudopodia

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24
Q

Entamoeba dispar is most easily confused morphologically with:

A

Entamoeba histolytica

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25
Microsporidia can cause intestinal symptoms and disease in other tissues particularly in immunocompromised patients.
True
26
Oocysts of cryptosporidium spp. can be detected in stool specimens using the modified acid fast stain.
True
27
Fecal immunoassays for antigen detection have become more commonly used to diagnose infections with Dientamoeba fragilis and Blastocystis spp.
False
28
In the United States, sporadic mini outbreaks of diarrheal disease have been associated with the ingestion of strawberries, raspberries, fresh basil, mesclun (baby lettuce leaves) and snow peas. The most likely causative agent is cryptosporidium spp.
False
29
Although the pathogenicity of Blastocystis spp. has been controversial, newer information suggests that numerous strains and species are included in the name of which are pathogenic and some non-pathogenic.
False
30
Ova and parasite examination - routine examination of stool.
routine examination of stool
31
. Dientamoeba fragilis
no known cyst form
32
Entamoeba histolytica
cause of amebiasis
33
Giardia duodenalis
waterborne: travelers diarrhea
34
Microsporidia
immunocompromised patients
35
Cryptosporidium
immediately infective oocysts
36
Fecal immunoassays
used for giardia, cryptosporidium spp.
37
Neo Balantidium coli is rare in the United States.
True
38
Entamoeba dispar is a nonpathogenic amoeba.
True
39
Blastocystis spp. is the most common intestinal parasite.
True
40
Babesia is an organism that has been implicated in disease from splenectomized and nonsplenectomized patients. Morphologically the parasite resembles:
Plasmodium falciparum rings
41
A 60-year-old Brazilian patient with cardiac irregularities and congestive heart failure suddenly dies. Examination of the myocardium revealed numerous amastigotes and indication that the cause of death was most likely:
Trypanosomiasis with Trypanosoma cruzi
42
Plasmodium vivax and Plasmodium ovale are similar because they:
Exhibit Schüffner's dots and have a true relapse in the life cycle
43
Disease caused by Trypanosoma brucei gambiense and Trypanosoma brucei rhodesiense have distinct differences which include:
The symptoms and severity of the overall illness
44
Although Giemsa stain is often recommended for staining thick and thin blood films, any of the blood stains can be used.
True
45
Trypanosoma cruzi and Leishmania spp. are now endemic within certain areas of the United States.
True
46
The fifth human malaria, Plasmodium knowlesi, is considered relatively harmless and can be easily identified and differentiated from the other Plasmodium spp.
False
47
Of the American trypanosome or African trypanosome infections, those caused by Trypanosoma brucei spp. are known to cause severe problems in tissue transplantation.
False
48
In addition to transmission by insect vectors, transmission of blood parasites can also be caused by blood transfusions and shared needles from infected individuals.
True
49
Band form trophozoites are associated with which organism?
Plasmodium malariae
50
Multiple rings per RBC, not endemic in the United States are associated with which organism?
Plasmodium falciparum
51
Which organism causes Chagas' disease?
Trypanosoma cruzi
52
Military returning from Afghanistan and Iraq are associated with which condition?
Leishmania skin lesions
53
What is considered a stat procedure?
Thick, thin blood films
54
Enlarged infected RBC, ameboid trophozoites are associated with which organism?
Plasmodium vivax
55
Which organism mimics both P. falciparum and P. malariae?
Plasmodium knowlesi
56
One set of malaria blood films is sufficient for diagnosis.
False
57
Which organism causes cutaneous and visceral disease?
Leishmania spp.
58
Which organism is endemic within the United States?
Babesia spp.
59
A 12-year-old girl is brought to the emergency department with meningitis and a history of swimming in a warm-water spring. Motile Amoebae that measure 10 μm in size are seen in the CSF and are most likely:
Naegleria fowleri trophozoites
60
Toxoplasma gondii (toxoplasmosis) is characterized by:
Possible congenital infections Possible difficulties with interpretation of serologic tests for antibody Infection from ingestion of raw/rare meats or oocysts from cat feces
61
Eye infections with Acanthamoeba spp. have most commonly been traced to:
Use of contaminated lens care solutions
62
Which specimen is the least likely to provide recovery of Trichomonas vaginalis?
Stool
63
A non-nutrient agar plate is seeded with Escherichia coli and then is inoculated with a specimen taken from an eye lesion. Organisms were recovered from the plate and were identified as Acanthamoeba species, the cause of keratitis.
True
64
Toxoplasma gondii can cause severe CNS disease in patients with AIDS; the cause is often reactivation of latent toxoplasmosis.
True
65
Acanthamoeba keratitis is often linked to swimming in contaminated freshwater lakes and ponds where free-living amoeba live in the water and soil.
False
66
Trichomonas vaginalis causes disease and symptoms in both males and females; however, the majority of infected women remain asymptomatic during the infection.
False
67
Primary amebic meningoencephalitis is a chronic disease in which the patient may develop symptoms over a long period of time, often months.
False
68
Trichomonas vaginalis has which characteristic?
No known cyst form
69
Naegleria fowleri is associated with which activity?
Swimming in freshwater
70
Toxoplasma gondii is an organism that is transmitted as a congenital infection.
True
71
Acanthamoeba eye infection is associated with which condition?
Keratitis
72
GAE is a chronic CNS disease, not associated with swimming.
True
73
Trichomoniasis in males is often asymptomatic.
True
74
PAM is an acute, fatal disease.
True
75
Poor contact lens care is associated with which issue?
Lens care use of outdated solutions
76
Balamuthia mandrillaris is also associated with which condition?
GAE
77
Toxoplasmosis can complicate which type of testing?
Serologic testing

Parasitology (1 decks)

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