Question 1

The easiest way to prevent Taenia infection in humans is to

Accepted Answer

A)   vaccinate cows and pigs.
B)   vaccinate humans who are in contact with cows and pigs.
C)   spray pastures and grazing lands with toxins that kill the parasite.
D)   thoroughly cook or freeze meat.
E)   identify patients with cysticerci in their muscles.F) C) and D)
G) A) and E)

Question 2

The (brain/heart/liver)is the organ most severely damaged by Trypanosoma cruzi.

Accepted Answer

The answer of The (brain/heart/liver)is the organ most severely damaged...

Question 3

Once infected with Trypanosoma brucei,the patient's immune system cannot clear the infection and develop immunity because the parasite

Accepted Answer

A)   has flagella that allow it to travel all over the body.
B)   matures into infectious trypomastigotes.
C)   reproduces by binary fission.
D)   changes its glycoprotein surface antigens every time it replicates.
E)   invades the central nervous system.F) A) and B)
G) C) and E)

Question 4

Which of the following is an accidental parasite of humans?

Accepted Answer

A)   Ascaris lumbricoides
B)   Acanthamoeba
C)   Balantidium coli
D)   Entamoeba histolytica
E)   PlasmodiumF) B) and D)
G) A) and E)

Question 5

A contact lens wearer and cat owner begins to experience problems with her eye.The eye is inflamed and painful,and examination of the eye reveals that the conjunctiva is ulcerating.Which of the following parasites is most likely responsible?

Accepted Answer

A)   Acanthamoeba
B)   Cryptosporidium parvum
C)   Entamoeba histolytica
D)   Toxoplasma gondii
E)   Trypanosoma cruziF) C) and E)
G) A) and B)

Question 6

Plasmodium reproduces by binary fission.

Accepted Answer

A) True 
 B)False

Question 7

Leishmania species cause systemic disease as well as superficial diseases.

Accepted Answer

A) True 
 B)False

Question 8

Humans can be accidental intermediate hosts for some tapeworms.

Accepted Answer

A) True 
 B)False

Question 9

The parasites classified as Nematodes

Accepted Answer

A)   are known as flukes.
B)   are known as roundworms.
C)   have males of the species larger than females of the species.
D)   do not have a digestive system.
E)   are all monoecious.F) D) and E)
G) A) and E)

Question 10

Apicomplexans reproduce asexually by (mitosis/schizogony/fission).

Accepted Answer

The answer of Apicomplexans reproduce asexually by (mitosis/schizogony/fission)....

Question 11

The infectious stage of a beef tapeworm for humans is the

Accepted Answer

A)   gravid proglottids in feces.
B)   eggs in contaminated water.
C)   larvae in feces.
D)   cysticerci in beef.
E)   mature worms.F) A) and D)
G) B) and C)

Question 12

All flukes are monoecious.

Accepted Answer

A) True 
 B)False

Question 13

Contact with infected cats and their feces is the only mode of transmission of Toxoplasma to humans.

Accepted Answer

A) True 
 B)False

Question 14

Eating undercooked (fish/pork/snails/vegetables)can result in infestation with Taenia solium.

Accepted Answer

The answer of Eating undercooked (fish/pork/snails/vegetables)can result in infestation with...

Question 15

The (cestodes/nematodes/trematodes)are helminths with an incomplete digestive system.

Accepted Answer

The answer of The (cestodes/nematodes/trematodes)are helminths with an incomplete digestive...

Question 16

Which of the following parasitic infections can be diagnosed using a blood smear?

Accepted Answer

A)   African sleeping sickness
B)   toxoplasmosis
C)   malaria
D)   African sleeping sickness and malaria
E)   toxoplasmosis and malariaF) A) and B)
G) C) and D)

Question 17

Which of the following is transmitted by the fecal-oral route?

Accepted Answer

A)   Entamoeba histolytica
B)   Plasmodium
C)   Schistosoma
D)   Trichomonas
E)   Schistosoma and TrichomonasF) C) and D)
G) A) and E)

Question 18

The protozoans known as apicomplexans

Accepted Answer

A)   are motile.
B)   reproduce by schizogony.
C)   are intracellular parasites.
D)   are motile intracellular parasites.
E)   reproduce by schizogony and are intracellular parasites.F) B) and E)
G) A) and D)

Question 19

The (definitive/intermediate/primary)host is where immature stages of parasites develop.

Accepted Answer

The answer of The (definitive/intermediate/primary)host is where immature stages of...

Question 20

Humans become infected with Toxoplasma gondii primarily by

Accepted Answer

A)   being bitten by a tick.
B)   direct skin penetration.
C)   ingesting food or water contaminated with cysts.
D)   ingesting meat containing the parasite.
E)   intimate contact with another person.F) All of the above
G) None of the above

Exam 23: Parasitic Protozoa, Helminths, and Arthropod Vectors

Humans can be accidental intermediate hosts for some tapeworms.

Correct AnswerverifiedShow Answer

The (cestodes/nematodes/trematodes)are helminths with an incomplete digestive system.

Correct AnswerverifiedShow Answer

The easiest way to prevent Taenia infection in humans is to

Correct AnswerverifiedShow Answer

Contact with infected cats and their feces is the only mode of transmission of Toxoplasma to humans.

Correct AnswerverifiedShow Answer

The (brain/heart/liver)is the organ most severely damaged by Trypanosoma cruzi.

Correct AnswerverifiedShow Answer

Apicomplexans reproduce asexually by (mitosis/schizogony/fission).

Correct AnswerverifiedShow Answer

Leishmania species cause systemic disease as well as superficial diseases.

Correct AnswerverifiedShow Answer

The parasites classified as Nematodes

Correct AnswerverifiedShow Answer

Plasmodium reproduces by binary fission.

Correct AnswerverifiedShow Answer

Eating undercooked (fish/pork/snails/vegetables)can result in infestation with Taenia solium.

Correct AnswerverifiedShow Answer

Which of the following parasitic infections can be diagnosed using a blood smear?

Correct AnswerverifiedShow Answer

Which of the following is an accidental parasite of humans?

Correct AnswerverifiedShow Answer

The infectious stage of a beef tapeworm for humans is the

Correct AnswerverifiedShow Answer

Once infected with Trypanosoma brucei,the patient's immune system cannot clear the infection and develop immunity because the parasite

Correct AnswerverifiedShow Answer

The (definitive/intermediate/primary)host is where immature stages of parasites develop.

Correct AnswerverifiedShow Answer

All flukes are monoecious.

Correct AnswerverifiedShow Answer

The protozoans known as apicomplexans

Correct AnswerverifiedShow Answer

Humans become infected with Toxoplasma gondii primarily by

Correct AnswerverifiedShow Answer

Which of the following is transmitted by the fecal-oral route?

Correct AnswerverifiedShow Answer

A contact lens wearer and cat owner begins to experience problems with her eye.The eye is inflamed and painful,and examination of the eye reveals that the conjunctiva is ulcerating.Which of the following parasites is most likely responsible?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified