Question 1

Which of the following intestinal protozoa are considered parasites of humans only?

Accepted Answer

A)   Entamoeba histolytica
B)   Balantidium coli
C)   Cyclospora cayentanensis
D)   Giardia intestinalis
E)   both Entamoeba histolytica and Cyclospora cayentanensisF) A) and B)
G) None of the above

Question 2

Damage to the (brain/heart/liver)is the primary result of fetal infection with Toxoplasma gondii.

Accepted Answer

The answer of Damage to the (brain/heart/liver)is the primary result...

Question 3

Which of the following is a ciliated pathogen of the intestinal tract?

Accepted Answer

A)   Balantidium
B)   Plasmodium
C)   Trypanosoma
D)   Leishmania
E)   GiardiaF) B) and E)
G) C) and D)

Question 4

Severe frothy diarrhea with a "rotten-egg" smell accompanied by abdominal pain,bloating,and fever are signs and symptoms consistent with

Accepted Answer

A)   balantidiasis.
B)   Chagas' disease.
C)   cryptosporidiosis.
D)   giardiasis.
E)   leishmaniasis.F) A) and B)
G) C) and D)

Question 5

What do Echinococcus granulosus,Entamoeba histolytica,and Enterobius vermicularis have in common?

Accepted Answer

A)   they are transmitted by insect vectors.
B)   they live in the intestines of their definitive host.
C)   they are intracellular parasites.
D)   they cause zoonoses in humans.
E)   they are diagnosed by examination of a blood smear.F) C) and D)
G) A) and D)

Question 6

The definitive host of a parasite is

Accepted Answer

A)   the host for immature stages of the parasite.
B)   where the mature form of the parasite occurs.
C)   also the vector for the parasite.
D)   the host that the parasite name is based on.
E)   the host for the dormant stage of the parasite.F) None of the above
G) B) and D) B

Question 7

The presence of active motile multiflagellated trophozoites in vaginal or urethral secretion is indicative of infection with

Accepted Answer

A)   Trichomonas vaginalis.
B)   Chlamydia trachomatis.
C)   Giardia intestinalis.
D)   Acanthamoeba.
E)   Balantidium coli.F) C) and E)
G) A) and B) A

Question 8

Which of the following species of Plasmodium causes cerebral malaria?

Accepted Answer

A)   only P. falciparum
B)   P. ovale and P. malariae
C)   P. ovale and P. vivax
D)   P. vivax and P. malariae
E)   P. vivax, P. malariae, and P. vivaxF) B) and E)
G) C) and D)

Question 9

Enterobius vermicularis are commonly known as (pinworms/hookworms/tapeworms)because of the shape of the female's tail.

Accepted Answer

The answer of Enterobius vermicularis are commonly known as (pinworms/hookworms/tapeworms)because...

Question 10

The primary risk to humans infected with Echinococcus granulosus is

Accepted Answer

A)   development of cysticerci.
B)   formation of hydatid cysts.
C)   intestinal obstruction.
D)   anemia.
E)   infection of the fetus.F) None of the above
G) B) and D) B

Question 11

Which of the following parasites is not generally microscopic in its mature form,even though microbiologists usually study them?

Accepted Answer

A)   amoebae
B)   toxoplasmas
C)   helminths
D)   leishmanias
E)   cyclosporasF) None of the above
G) A) and E)

Question 12

Elephantiasis is caused by

Accepted Answer

A)   blood flukes.
B)   liver flukes.
C)   filarial roundworms.
D)   tapeworms.
E)   flatworms.F) A) and B)
G) None of the above

Question 13

Which of the following regarding all of the tapeworms that infect humans is TRUE?

Accepted Answer

A)   They all have non-human intermediate hosts.
B)   The larva can directly infect humans upon contact with skin.
C)   Humans are the normal intermediate hosts.
D)   They are transmitted by insect vectors.
E)   They reside in the muscle tissue of the definitive host.F) B) and E)
G) A) and B)

Question 14

Which of the following is the most common parasitic disease in industrialized nations?

Accepted Answer

A)   giardiasis
B)   Trichomonas infection
C)   schistosomiasis
D)   toxoplasmosis
E)   balantidiasisF) A) and E)
G) C) and D)

Question 15

A hunter was camping with his dog near a mountain spring where beavers were building a dam,and many animals came to drink.After a month,he developed severe watery diarrhea,abdominal pain,bloating,vomiting,and low-grade fever.His stool had a "rotten-egg" smell of hydrogen sulfide.What is the most likely parasite causing this patient's condition,and how is diagnosis confirmed?

Accepted Answer

This person is most likely suffering fro...

Question 16

Which of the following is the same for both Trypanosoma cruzi and Trypanosoma brucei?

Accepted Answer

A)   central nervous system infection
B)   where the protozoan matures in the vector
C)   type of arthropod vector
D)   importance of early diagnosis and treatment
E)   means of entry into the hostF) A) and E)
G) A) and C)

Question 17

A patient at a clinic complains of diarrhea that is occasionally bloody and has persisted for several days.A microscopic examination of a stool sample reveals the presence of very round cysts.These signs are consistent with infection by

Accepted Answer

A)   Entamoeba histolytica.
B)   Enterobius vermicularis.
C)   Balantidium coli.
D)   Giardia intestinalis.
E)   Trypanosoma cruzi.F) B) and E)
G) B) and D)

Question 18

The parasite (Leishmania/Toxoplasma/Trichomonas)is an obligate parasite that is incapable of surviving long outside the human host and is transmitted almost exclusively via sexual activity.

Accepted Answer

The answer of The parasite (Leishmania/Toxoplasma/Trichomonas)is an obligate parasite that...

Question 19

Humans become infected with Fasciola by

Accepted Answer

A)   ingesting cysts on vegetation.
B)   consuming cysticerci in contaminated meat.
C)   ingesting water contaminated with eggs.
D)   the penetration of cercariae through the skin.
E)   the bite of infected mosquitoes.F) All of the above
G) A) and E)

Question 20

Several species of Plasmodium cause malaria in humans.

Accepted Answer

A) True 
 B)False

Exam 23: Parasitic Protozoa, Helminths, and Arthropod Vectors

Which of the following intestinal protozoa are considered parasites of humans only?

Correct Answer
verified

Damage to the (brain/heart/liver)is the primary result of fetal infection with Toxoplasma gondii.

Correct Answer
verified

Which of the following is a ciliated pathogen of the intestinal tract?

Correct Answer
verified

Severe frothy diarrhea with a "rotten-egg" smell accompanied by abdominal pain,bloating,and fever are signs and symptoms consistent with

Correct Answer
verified

What do Echinococcus granulosus,Entamoeba histolytica,and Enterobius vermicularis have in common?

Correct Answer
verified

The definitive host of a parasite is

Correct Answer
verified
B

The presence of active motile multiflagellated trophozoites in vaginal or urethral secretion is indicative of infection with

Correct Answer
verified
A

Which of the following species of Plasmodium causes cerebral malaria?

Correct Answer
verified

Enterobius vermicularis are commonly known as (pinworms/hookworms/tapeworms)because of the shape of the female's tail.

Correct Answer
verified

The primary risk to humans infected with Echinococcus granulosus is

Correct Answer
verified
B

Which of the following parasites is not generally microscopic in its mature form,even though microbiologists usually study them?

Correct Answer
verified

Elephantiasis is caused by

Correct Answer
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Which of the following regarding all of the tapeworms that infect humans is TRUE?

Correct Answer
verified

Which of the following is the most common parasitic disease in industrialized nations?

Correct Answer
verified

Correct Answer
verified
This person is most likely suffering fro...
View Answer

Which of the following is the same for both Trypanosoma cruzi and Trypanosoma brucei?

Correct Answer
verified

A patient at a clinic complains of diarrhea that is occasionally bloody and has persisted for several days.A microscopic examination of a stool sample reveals the presence of very round cysts.These signs are consistent with infection by

Correct Answer
verified

The parasite (Leishmania/Toxoplasma/Trichomonas)is an obligate parasite that is incapable of surviving long outside the human host and is transmitted almost exclusively via sexual activity.

Correct Answer
verified

Humans become infected with Fasciola by

Correct Answer
verified

Several species of Plasmodium cause malaria in humans.

Correct Answer
verified

Exam 23: Parasitic Protozoa, Helminths, and Arthropod Vectors

Which of the following intestinal protozoa are considered parasites of humans only?

Correct AnswerverifiedShow Answer

Damage to the (brain/heart/liver)is the primary result of fetal infection with Toxoplasma gondii.

Correct AnswerverifiedShow Answer

Which of the following is a ciliated pathogen of the intestinal tract?

Correct AnswerverifiedShow Answer

Severe frothy diarrhea with a "rotten-egg" smell accompanied by abdominal pain,bloating,and fever are signs and symptoms consistent with

Correct AnswerverifiedShow Answer

What do Echinococcus granulosus,Entamoeba histolytica,and Enterobius vermicularis have in common?

Correct AnswerverifiedShow Answer

The definitive host of a parasite is

Correct AnswerverifiedB

The presence of active motile multiflagellated trophozoites in vaginal or urethral secretion is indicative of infection with

Correct AnswerverifiedA

Which of the following species of Plasmodium causes cerebral malaria?

Correct AnswerverifiedShow Answer

Enterobius vermicularis are commonly known as (pinworms/hookworms/tapeworms)because of the shape of the female's tail.

Correct AnswerverifiedShow Answer

The primary risk to humans infected with Echinococcus granulosus is

Correct AnswerverifiedB

Which of the following parasites is not generally microscopic in its mature form,even though microbiologists usually study them?

Correct AnswerverifiedShow Answer

Elephantiasis is caused by

Correct AnswerverifiedShow Answer

Which of the following regarding all of the tapeworms that infect humans is TRUE?

Correct AnswerverifiedShow Answer

Which of the following is the most common parasitic disease in industrialized nations?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedThis person is most likely suffering fro...View AnswerShow Answer

Which of the following is the same for both Trypanosoma cruzi and Trypanosoma brucei?

Correct AnswerverifiedShow Answer

A patient at a clinic complains of diarrhea that is occasionally bloody and has persisted for several days.A microscopic examination of a stool sample reveals the presence of very round cysts.These signs are consistent with infection by

Correct AnswerverifiedShow Answer

The parasite (Leishmania/Toxoplasma/Trichomonas)is an obligate parasite that is incapable of surviving long outside the human host and is transmitted almost exclusively via sexual activity.

Correct AnswerverifiedShow Answer

Humans become infected with Fasciola by

Correct AnswerverifiedShow Answer

Several species of Plasmodium cause malaria in humans.

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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B

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A

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Correct Answer
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B

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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This person is most likely suffering fro...
View Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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