Question 1

How does the life cycle for the Trypanosoma that causes sleeping sickness differ from the one that causes Chagas' disease?

Accepted Answer

Sleeping sickness is caused by T.brucei,...

Question 2

A human fecal sample is examined and found to contain a few strobila.The person is probably infected with

Accepted Answer

A)   Echinococcus granulosus.
B)   Giardia intestinalis.
C)   Taenia.
D)   Schistosoma.
E)   Necator americanus.F) D) and E)
G) B) and C)

Question 3

Which of the following contributes to infection with Trichomonas vaginalis?

Accepted Answer

A)   contact with contaminated fomites
B)   compromised immunity
C)   careless handwashing habits
D)   preexisting disease (chlamydia, for example) 
E)   living in an undeveloped area of the worldF) A) and D)
G) A) and C)

Question 4

The tsetse fly is responsible for the spread of

Accepted Answer

A)   African sleeping sickness.
B)   Chagas' disease.
C)   filariasis.
D)   kala-azar.
E)   toxoplasmosis.F) A) and E)
G) None of the above

Question 5

A person reports to a clinic complaining of fever and abdominal pain.The abdomen is swollen,and blood tests indicate liver damage.A stool sample is examined under a microscope and found to contain eggs with a spine projecting from its surface.The indications are consistent with infection with

Accepted Answer

A)   Ancylostoma duodenale.
B)   Enterobius vermicularis.
C)   Echinococcus granulosus.
D)   Schistosoma mansoni.
E)   Taenia solium.F) B) and D)
G) A) and B)

Question 6

The (proglottid/scolex/strobila)of an adult tapeworm is its anchor to the hosts intestine.

Accepted Answer

The answer of The (proglottid/scolex/strobila)of an adult tapeworm is its...

Question 7

Which of the following is the most common parasitic worm in the United States?

Accepted Answer

A)   Taenia saginata
B)   Echinococcus granulosus
C)   Schistosoma mansoni
D)   Enterobius vermicularis
E)   Ascaris lumbricoidesF) B) and C)
G) C) and D)

Question 8

Entamoeba histolytica can cause keratitis if it is introduced through an abrasion in the conjunctiva.

Accepted Answer

A) True 
 B)False

Question 9

Acanthamoeba and (Entamoeba/Naegleria/Plasmodium)cause rare and usually fatal infections of the brain.

Accepted Answer

The answer of Acanthamoeba and (Entamoeba/Naegleria/Plasmodium)cause rare and usually fatal...

Question 10

Which of the following nematodes can be transmitted by mosquitoes?

Accepted Answer

A)   Wuchereria bancrofti
B)   Ascaris lumbricoides
C)   Ancylostoma duodenale
D)   Necator americanus
E)   Enterobius vermicularisF) A) and B)
G) A) and C)

Question 11

Triatoma,commonly called "kissing bugs," are vectors of

Accepted Answer

A)   African sleeping sickness.
B)   Chagas' disease.
C)   Cyclosporiasis.
D)   Leishmania.
E)   schistosomiasis.F) A) and D)
G) B) and C)

Question 12

An intestinal parasite that is an emerging disease in North America,(Cryptosporidium/Cyclospora/Entamoeba)causes a watery diarrhea with fever.

Accepted Answer

The answer of An intestinal parasite that is an emerging...

Question 13

The helminth parasite Schistosoma

Accepted Answer

A)   is a cestode.
B)   uses snails as an intermediate host.
C)   has proglottids.
D)   is a roundworm.
E)   is a liver fluke.F) All of the above
G) C) and D)

Question 14

A stool sample contains eggs that are oval and have no evidence of a spine.This observation is consistent with infestation with ________ species.

Accepted Answer

A)   Fasciola
B)   Wuchereria
C)   Schistosoma
D)   Taenia
E)   TrypanosomaF) B) and E)
G) A) and E)

Question 15

Compare and contrast infection with Taenia saginata and Echinococcus granulosus in humans,including the consequences of the infections.

Accepted Answer

Both of these parasites are cestodes (ta...

Question 16

The ________ stage of a protozoan is the actively feeding and reproducing stage.

Accepted Answer

A)   trophozoite
B)   cyst
C)   cysticercus
D)   encysted
E)   merozoiteF) B) and D)
G) D) and E)

Question 17

The vectors of ________ are sand flies.

Accepted Answer

A)   beaver fever
B)   Chagas' disease
C)   filariasis
D)   giardiasis
E)   leishmaniasisF) A) and E)
G) B) and C)

Question 18

Why is snail fever a common name for infections with Schistosoma?

Accepted Answer

A)   The worms look like snails.
B)   They are contracted by eating snails.
C)   Snails are the intermediate host.
D)   Physical contact with snails may result in infection.
E)   The larval stage looks like a snail.F) A) and D)
G) A) and E)

Question 19

Balantidium coli is the only ciliate known to cause disease in humans.

Accepted Answer

A) True 
 B)False

Question 20

Which of the following organisms can colonize the nasal cavity and enter the brain to cause meningoencephalitis?

Accepted Answer

A)   Entamoeba histolytica
B)   Acanthamoeba
C)   Naegleria
D)   Balantidium
E)   GiardiaF) All of the above
G) A) and E)

Exam 23: Parasitic Protozoa, Helminths, and Arthropod Vectors

An intestinal parasite that is an emerging disease in North America,(Cryptosporidium/Cyclospora/Entamoeba)causes a watery diarrhea with fever.

Correct AnswerverifiedShow Answer

Balantidium coli is the only ciliate known to cause disease in humans.

Correct AnswerverifiedShow Answer

How does the life cycle for the Trypanosoma that causes sleeping sickness differ from the one that causes Chagas' disease?

Correct AnswerverifiedSleeping sickness is caused by T.brucei,...View AnswerShow Answer

Compare and contrast infection with Taenia saginata and Echinococcus granulosus in humans,including the consequences of the infections.

Correct AnswerverifiedBoth of these parasites are cestodes (ta...View AnswerShow Answer

Which of the following organisms can colonize the nasal cavity and enter the brain to cause meningoencephalitis?

Correct AnswerverifiedShow Answer

Acanthamoeba and (Entamoeba/Naegleria/Plasmodium)cause rare and usually fatal infections of the brain.

Correct AnswerverifiedShow Answer

A human fecal sample is examined and found to contain a few strobila.The person is probably infected with

Correct AnswerverifiedShow Answer

A person reports to a clinic complaining of fever and abdominal pain.The abdomen is swollen,and blood tests indicate liver damage.A stool sample is examined under a microscope and found to contain eggs with a spine projecting from its surface.The indications are consistent with infection with

Correct AnswerverifiedShow Answer

The (proglottid/scolex/strobila)of an adult tapeworm is its anchor to the hosts intestine.

Correct AnswerverifiedShow Answer

The ________ stage of a protozoan is the actively feeding and reproducing stage.

Correct AnswerverifiedShow Answer

Entamoeba histolytica can cause keratitis if it is introduced through an abrasion in the conjunctiva.

Correct AnswerverifiedShow Answer

The tsetse fly is responsible for the spread of

Correct AnswerverifiedShow Answer

The helminth parasite Schistosoma

Correct AnswerverifiedShow Answer

Which of the following nematodes can be transmitted by mosquitoes?

Correct AnswerverifiedShow Answer

Why is snail fever a common name for infections with Schistosoma?

Correct AnswerverifiedShow Answer

Triatoma,commonly called "kissing bugs," are vectors of

Correct AnswerverifiedShow Answer

A stool sample contains eggs that are oval and have no evidence of a spine.This observation is consistent with infestation with ________ species.

Correct AnswerverifiedShow Answer

Which of the following contributes to infection with Trichomonas vaginalis?

Correct AnswerverifiedShow Answer

The vectors of ________ are sand flies.

Correct AnswerverifiedShow Answer

Which of the following is the most common parasitic worm in the United States?

Correct AnswerverifiedShow Answer

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Sleeping sickness is caused by T.brucei,...
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Both of these parasites are cestodes (ta...
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