Multiple choice (Laventhal) Part II

Question 1

Malaria parasite with 6 to 12 merozoites in the schizonts

Answer 1

Plasmodium malariae

Question 2

C- or U-shaped body with a large kinetoplast

Answer 2

Trypanosoma cruzi

Question 3

Large kidney-shaped nucleus

Answer 3

Balantidium coli

Question 4

Trophozoites ingests red blood cell

Answer 4

Entamoeba histolytica

Question 5

Large glycogen vacuole

Answer 5

Iodamoeba butschlii

Question 6

Schizonts not seen in peripheral blood

Answer 6

Cytoisospora belli, Toxoplasma gondii, Plasmodium falciparum

Question 7

Pseudocysts in the brain

Answer 7

Toxoplasma gondii

Question 8

Oocysts found in the human feces

Answer 8

Cytoisospora belli

Question 9

Commonly causes relapses of malaria

Answer 9

Plasmodium vivax and Plasmodium ovale

Question 10

Transmitted by tsetse fly

Answer 10

Trypanosoma brucei gambiense and Trypanosoma brucie rhodesiense

Question 11

Pathogenic intestinal flagellates

Answer 11

Giardia lamblia

Question 12

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:

Answer 12

Entamoeba gingivalis

Question 13

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

Answer 13

D

Question 14

Acanthamoeba keratitis is usually associated with:

Answer 14

Contaminated lens-cleaning solutions

Question 15

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

Answer 15

Modified Ziehl-Neelson acid-fast stain

Question 16

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

Answer 16

Gardia lamblia and Cryptosporidium spp.

Question 17

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

Answer 17

Plasmodium falciparum

Question 18

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

Answer 18

A large glycogen vacuole

Question 19

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

Answer 19

Plasmodium vivax

Question 20

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

Answer 20

Cyclospora cayetanensis

Question 21

Black water fever is caused by:

Answer 21

Plasmodium falciparum

Question 22

Winterbottom’s sign is associated by:

Answer 22

Trypanosoma brucei gambiense

Question 23

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

Answer 23

Blastocytis hominis

Question 24

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

Answer 24

Leishmania donovani

Question 25

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

Answer 25

cyclops spp.

Question 26

Obligate myiasis is associated with:

Answer 26

Cochliomyia spp.

Question 27

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

Answer 27

Ixodes spp.

Question 28

The nematode Loa loa is transmitted to human by:

Answer 28

Chrysops spp.

Question 29

The mange mite is:

Answer 29

Sarcoptes spp.

Question 30

The developmental stage not found in holometabolous metamophosis is the:

Answer 30

Pupa

Question 31

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

Answer 31

cauplius

Question 32

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

Answer 32

Vertical transmission

Question 33

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

Answer 33

Facultative myiasis Amor's note: Obligate myiasis

Question 34

Pediculosis is caused by:

Answer 34

Lice

Question 35

The family that contains hard ticks is:

Answer 35

Ixodidae

Question 36

Yersinia pestis is transmitted by:

Answer 36

Xenopsylla spp.

Question 37

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

Answer 37

Nosocomial myiasis

Question 38

The mite associated with asthma and respiratory symptoms is:

Answer 38

Dematophagoides spp.

Question 39

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:

Answer 39

Eosinophils

Question 40

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

Answer 40

Protozoan cysts and helminth eggs

Question 41

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

Answer 41

A blood film for malaria

Question 42

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

Answer 42

cellophane tape test

Question 43

Ameba trophozoite motility is best observed using a:

Answer 43

Unstained saline wet mount

Question 44

The intermediate host for Taenia saginata is:

Answer 44

Cow

Question 45

Which cestode produces an operculated egg

Answer 45

Diphyllobothrium latum

Question 46

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:

Answer 46

plasmodium vivax

Question 47

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

Answer 47

Fleet phospho-soda

Question 48

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

Answer 48

Clonorchis sinensis

Question 49

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

Answer 49

Plasmodium malariae

Question 50

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

Answer 50

Enterobius vermicularis

Question 51

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

Answer 51

Entamoeba coli

Question 52

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

Answer 52

Paragonimus westermani

Question 53

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

Answer 53

Middle of the night

Question 54

The trichrome stain is used to identify

Answer 54

Intestinal protozoa

Question 55

The head of the scolex of D. latum

Answer 55

has two sucking grooves

Question 56

eggs that has a large lateral spine

Answer 56

Schistosoma mansoni

Question 57

best transport preservative for protozoa or flagella trophozoites?

Answer 57

Polyvinyl alcohol

Question 58

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

Answer 58

in pork muscle, T. solium

Question 59

Babesia spp. is transmitted to human by:

Answer 59

bite if an infected tick

Question 60

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:

Answer 60

Chilomastix mesnili

Question 61

Infection with brugia malayi is best diagnosed by:

Answer 61

Knott concentration test

Question 62

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

Answer 62

Schistosoma japonicum

Question 63

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

Answer 63

Taenia solium

Question 64

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

Answer 64

Babesia spp.

Question 65

Pinworm disease can be best diagnosed by using:

Answer 65

The cellophane tape test

Question 66

can cause primary amoebic meningoencephalitis

Answer 66

Nargleria spp

Question 67

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?

Answer 67

Fasciolopsis buski

Question 68

requires two different intermediate hosts in its life cycle

Answer 68

Trichuris trichiura