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PARASITOLOGY > Multiple choice (Laventhal) Part II > Flashcards

Multiple choice (Laventhal) Part II Flashcards

1
Q

Malaria parasite with 6 to 12 merozoites in the schizonts

A

Plasmodium malariae

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2
Q

C- or U-shaped body with a large kinetoplast

A

Trypanosoma cruzi

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3
Q

Large kidney-shaped nucleus

A

Balantidium coli

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4
Q

Trophozoites ingests red blood cell

A

Entamoeba histolytica

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5
Q

Large glycogen vacuole

A

Iodamoeba butschlii

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6
Q

Schizonts not seen in peripheral blood

A

Cytoisospora belli, Toxoplasma gondii, Plasmodium falciparum

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7
Q

Pseudocysts in the brain

A

Toxoplasma gondii

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8
Q

Oocysts found in the human feces

A

Cytoisospora belli

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9
Q

Commonly causes relapses of malaria

A

Plasmodium vivax and Plasmodium ovale

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10
Q

Transmitted by tsetse fly

A

Trypanosoma brucei gambiense and Trypanosoma brucie rhodesiense

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11
Q

Pathogenic intestinal flagellates

A

Giardia lamblia

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12
Q

Material from a gum lesion is stained with trichrome, revealing amebae that have a single nucleus and contain partially digested neutrophils. The most likely identification is:

A

Entamoeba gingivalis

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13
Q

Concerning Toxoplasma gondii, all of the following are true EXCEPT;

a. Congenital infections can occur
b. Human infection occurs when oocysts are ingested
c. They are diagnosed by serology tests
d. Human infection occurs when sarcocysts are ingested in undercooked meat
e. Domestic cats are definitive hosts

A

D

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14
Q

Acanthamoeba keratitis is usually associated with:

A

Contaminated lens-cleaning solutions

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15
Q

Cryptosporidium spp. oocysts are best detected in fecal specimens using the

A

Modified Ziehl-Neelson acid-fast stain

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16
Q

The two parasitic organisms most commonly associated with waterborne outbreaks of diarrhea include:

A

Gardia lamblia and Cryptosporidium spp.

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17
Q

The malaria parasite characterized by the presence of multiple ring forms or “banana-shaped” gametocytes in red blood cells is:

A

Plasmodium falciparum

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18
Q

The characteristic that most clearly differentiated cysts of Iodameoba butschlii from other amebic cysts is:

A

A large glycogen vacuole

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19
Q

A blood parasite that invades reticulocytes, is characterized by a single ring forms and Schuffner’s dots, and may cause a true relapse is:

A

Plasmodium vivax

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20
Q

The protozoan causing diarrhea that has been associated with raspberries, strawberries, herbs and some vegetable is:

A

Cyclospora cayetanensis

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21
Q

Black water fever is caused by:

A

Plasmodium falciparum

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22
Q

Winterbottom’s sign is associated by:

A

Trypanosoma brucei gambiense

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23
Q

fecal samples should be washed with saline only because washing with waster will destroy:

A

Blastocytis hominis

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24
Q

The parasite that may invade and multiple in the liver or spleen is:

A

Leishmania donovani

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25
Q

The arthropods vector associated with the transmission of the fish tapeworm:

A

cyclops spp.

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26
Q

Obligate myiasis is associated with:

A

Cochliomyia spp.

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27
Q

The organism responsible for the lyme disease is transmitted to humans by:

A

Ixodes spp.

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28
Q

The nematode Loa loa is transmitted to human by:

A

Chrysops spp.

29
Q

The mange mite is:

A

Sarcoptes spp.

30
Q

The developmental stage not found in holometabolous metamophosis is the:

A

Pupa

31
Q

The free swimming larva form found in the crustacean life cycle is called the:

A

cauplius

32
Q

Babesia. spp, transmitted by a tick, is maintained in the tick population by:

A

Vertical transmission

33
Q

Fly larvae were recovered from an open wound on the arm of a nursing home patient. this finding is

A

Facultative myiasis

Amor’s note: Obligate myiasis

34
Q

Pediculosis is caused by:

A

Lice

35
Q

The family that contains hard ticks is:

A

Ixodidae

36
Q

Yersinia pestis is transmitted by:

A

Xenopsylla spp.

37
Q

A larva was removed from a bedridden hospital patient’s nose. this condition is referred to as:

A

Nosocomial myiasis

38
Q

The mite associated with asthma and respiratory symptoms is:

A

Dematophagoides spp.

39
Q

Charcot-leyden crystals may be noted when examining fecal preparations. these crystals are associated with the immune response and are thought to be breakdown products of:

A

Eosinophils

40
Q

The formalin-ethyl acetate concentration method for feces is used to demonstrate:

A

Protozoan cysts and helminth eggs

41
Q

one of the following diagnostic procedures can be considered an urgent procedure (stat) that procedure is:

A

A blood film for malaria

42
Q

The best test procedure for correctly identifying Enterobius vermicularis infections is the:

A

cellophane tape test

43
Q

Ameba trophozoite motility is best observed using a:

A

Unstained saline wet mount

44
Q

The intermediate host for Taenia saginata is:

A

Cow

45
Q

Which cestode produces an operculated egg

A

Diphyllobothrium latum

46
Q

A stained blood smear reveals giant platelets and many reticulocytes containing schuffners dots, large ring form, and schizont with 12-24 merozoites, you would report this parasite as:

A

plasmodium vivax

47
Q

When purged specimens are to be examined for amebae, which of the following should be used yo obtain the specimen

A

Fleet phospho-soda

48
Q

A small, operculated egg with a light bulb shape was found in the feces of a patient with liver abnormalities:

A

Clonorchis sinensis

49
Q

Mature trophozoites and young schizonts in a blood smear shows a distinct tendency towards band formation and the red blood cell are not enlarged

A

Plasmodium malariae

50
Q

Parasites produces eggs that are immediately infective to human and the eggs infect a person directly via ingestion

A

Enterobius vermicularis

51
Q

intestinal protozoa is not identified as a causative agent of diarrhea?

A

Entamoeba coli

52
Q

could be identified from the bloody sputum of an immigrant from the Far east?

A

Paragonimus westermani

53
Q

In clinical cases of Wuchereria bancrofti, the most favorable time to find parasite in the blood is

A

Middle of the night

54
Q

The trichrome stain is used to identify

A

Intestinal protozoa

55
Q

The head of the scolex of D. latum

A

has two sucking grooves

56
Q

eggs that has a large lateral spine

A

Schistosoma mansoni

57
Q

best transport preservative for protozoa or flagella trophozoites?

A

Polyvinyl alcohol

58
Q

The cystecercus larva form is found where noted as part of the life cycle of which parasite

A

in pork muscle, T. solium

59
Q

Babesia spp. is transmitted to human by:

A

bite if an infected tick

60
Q

A stained fecal smear reveals mononucleate flagellates with a comma-shaped posterior, and lemon-shaped mononucleate cysts with a clear, nipplelike bleb at one end. you would report this parasite as:

A

Chilomastix mesnili

61
Q

Infection with brugia malayi is best diagnosed by:

A

Knott concentration test

62
Q

Cercariae of this parasite penetrate the skin of humans, thereby causing infection

A

Schistosoma japonicum

63
Q

Recovery of human feces of a 7-mm-long gravid proglottid containing right lateral uterine branches indicates infection with

A

Taenia solium

64
Q

This parasite was found in the blood smear of a patient who had a recent summer vacation in New england and reported many insect and tick bites

A

Babesia spp.

65
Q

Pinworm disease can be best diagnosed by using:

A

The cellophane tape test

66
Q

can cause primary amoebic meningoencephalitis

A

Nargleria spp

67
Q

because you are responsible for parasite control on an island, you chemically treat the small freshwater lake for snails, but you accidentally dump in too much chemical and kill every living thing in the lake. your action breaks the life cycle and controls the spread of which of the parasite?

A

Fasciolopsis buski

68
Q

requires two different intermediate hosts in its life cycle

A

Trichuris trichiura

PARASITOLOGY (4 decks)

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