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Multiple Choice Quiz
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1

Which of the recognized groups of protozoans lack typical organelles for movement?
A)Sarcodinians
B)Apicomplexans
C)Ciliates
D)Amoebas
E)Flagellates
2

Where is the highest occurrence of amebiasis found?
A)British Isles
B)North America
C)Tropical regions
D)Siberia
E)Desert regions
3

Although both Naegleria fowleri and Acanthamoeba are found in many water supplies, where they are especially abundant?
A)In warm waters containing high concentrations of bacteria
B)In the Great Salt Lake
C)In the Arctic Ocean
D)In freshwater lakes
E)In hot sulfur springs
4

What is the reservoir for Balantidium coli?
A)The human gastrointestinal tract
B)Soil
C)Rodents
D)The large intestines of pigs
E)Mosquitoes
5

Which mastigophoran species causes a sexually transmitted disease?
A)Trypanosoma cruzi
B)Leishmania donovani
C)Giardia lamblia
D)Trichomonas vaginalis
E)Trypanosoma brucei
6

What is the most common flagellate isolated in clinical specimens?
A)Trypanosoma cruzi
B)Leishmania donovani
C)Giardia lamblia
D)Trichomonas vaginalis
E)Trypanosoma brucei
7

What form of Giardia lamblia plays a greater role in transmission?
A)Nuclei
B)Trophozoites
C)Metacysts
D)Karyosomes
E)Cysts
8

How are both Trypanosoma and Leishmania spread?
A)By blood-sucking vectors
B)Mother-to-fetus
C)Sexually transmitted
D)Fecal-oral route
E)Person-to-person
9

In what developmental stage of the homoflagellates does the organism possess a free anterior flagellum and an undulating membrane?
A)Cyst
B)Epimastigote
C)Trypomastigote
D)Amastigote
E)Promastigote
10

How are trypanosomes able to evade the host immune system?
A)They have an anti-phagocytic capsule.
B)They are obligate intracellular parasites.
C)They continuously alter their surface antigens.
D)They produce enzymes that digest antibodies.
E)They cause lysis of T cells.
11

What organ is targeted during an infection with Trypanosoma cruzi?
A)Heart
B)Brain
C)Nervous system
D)Liver
E)Spleen
12

What serves as an important reservoir of Leishmania?
A)Humans
B)Soil
C)Rodents
D)Mosquitoes
E)Dogs
13

What is the most prevalent protozoan disease in the world?
A)Amebiasis
B)Balantidiosis
C)Giardiasis
D)Malaria
E)Trypanosomiasis
14

Where do most new cases of malaria occur?
A)South America
B)Australia
C)Asia
D)India
E)Africa
15

In malaria, where do the asexual sporozoites undergo schizogony to form merozoites?
A)In the stomach of the female Anopheles mosquito
B)In liver cells
C)In red blood cells
D)In macrophages
E)In lymph nodes
16

What organism causes the most dangerous form of malaria?
A)Giardia lamblia
B)Trypanosoma cruzi
C)Plasmodium ovale
D)Leishmania donovani
E)Plasmodium falciparum
17

The Cryptosporidium outbreak in Milwaukee, WI prompted water treatment plants to make what change?
A)Add more chlorine to the water supplies
B)Begin filtering water supplies
C)Begin boiling water supplies
D)Begin subjecting water supplies to ethylene oxide
E)Begin protecting water supplies from terrorists
18

Transmission of cyclosporiasis occurs by what method?
A)Person-to-person
B)Through the bite of the tsetse fly
C)Fecal-oral route
D)Respiratory route
E)Sexual transmission
19

Babesiosis resembles what disease in both pathology and symptomology?
A)Giardiasis
B)Amebiasis
C)Toxoplasmosis
D)Malaria
E)Cryptosporidiosis
20

Which group has the highest rate of helminth infections?
A)Adults living in industrialized countries
B)Children living in rural America
C)Teenage males throughout the world
D)Young girls who live in cold climates
E)Children in rural topical or subtropical areas
21

Which is not a pathological effect of helminth infections?
A)Diarrhea
B)Hemorrhage
C)Enlargement and swelling of organs
D)Anemia
E)Weight loss
22

What helminth is responsible for causing the greatest number of worm infections worldwide?
A)Enterobius vermicularis
B)Ascaris lumbricoides
C)Strongyloides stercoralis
D)Trichinella spiralis
E)Taenia saginata
23

How do humans acquire trichinosis?
A)By walking barefoot through areas where cats or dogs have defecated
B)By self-inoculation
C)By frequent contact with a dog's fur, paws, and tongue
D)By eating the uncooked meat of an infected animal
E)By a bite from a vector
24

What helminthic infection results in elephantiasis?
A)Bancroftian filariasis
B)Strongyloidiasis
C)Trichinosis
D)Whipworm infection
E)Pinworm infection
25

What is the intermediate host for the schistosomes?
A)Humans
B)Soil
C)Snails
D)Blood-sucking insects
E)Raw sewage





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