Question 1

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. 
A)  development of cysticerci. 
B)  formation of hydatid cysts. 
C)  intestinal obstruction. 
D)  anemia. 
E)  infection of the fetus. B

Question 2

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. 
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. B

Question 3

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

Question 4

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)  balantidiasis 
A)  giardiasis 
B)  Trichomonas infection 
C)  schistosomiasis 
D)  toxoplasmosis 
E)  balantidiasis

Question 5

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. vivax 
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. vivax

Question 6

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

Question 7

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)  cyclosporas 
A)  amoebae 
B)  toxoplasmas 
C)  helminths 
D)  leishmanias 
E)  cyclosporas

Question 8

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. 
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.

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

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 cayentanensis 
A)  Entamoeba histolytica 
B)  Balantidium coli 
C)  Cyclospora cayentanensis 
D)  Giardia intestinalis 
E)  both Entamoeba histolytica and Cyclospora cayentanensis

Question 11

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

Question 12

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 host 
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 host

Question 13

Several species of Plasmodium cause malaria in humans.

Accepted Answer

A) True 
 B)False

Question 14

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

Accepted Answer

A)  Balantidium 
B)  Plasmodium 
C)  Trypanosoma 
D)  Leishmania 
E)  Giardia 
A)  Balantidium 
B)  Plasmodium 
C)  Trypanosoma 
D)  Leishmania 
E)  Giardia

Question 15

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 16

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. 
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.

Question 17

Elephantiasis is caused by

Accepted Answer

A)  blood flukes. 
B)  liver flukes. 
C)  filarial roundworms. 
D)  tapeworms. 
E)  flatworms. 
A)  blood flukes. 
B)  liver flukes. 
C)  filarial roundworms. 
D)  tapeworms. 
E)  flatworms.

Question 18

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. 
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.

Question 19

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 20

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...

Exam 23: Parasitic Protozoa, Helminths, and Arthropod Vectors

The primary risk to humans infected with Echinococcus granulosus is

The definitive host of a parasite is

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

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

Which of the following species of Plasmodium causes cerebral malaria?

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

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

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

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

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

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

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

Several species of Plasmodium cause malaria in humans.

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

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

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

Elephantiasis is caused by

Humans become infected with Fasciola by

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.

A Brief History of Microbiology

The Chemistry of Microbiology

Cell Structure and Function

Microscopy, Staining, and Classification

Microbial Metabolism

Microbial Nutrition and Growth

Microbial Genetics

Recombinant DNA Technology

Controlling Microbial Growth in the Environment

Controlling Microbial Growth in the Body: Antimicrobial Drugs

Characterizing and Classifying Prokaryotes

Characterizing and Classifying Eukaryotes

Characterizing and Classifying Viruses, Viroids, and Prions

Infection, Infectious Diseases, and Epidemiology

Innate Immunity

Adaptive Immunity

Immunization and Immune Testing

Immune Disorders

Pathogenic Gram Positive Bacteria

Pathogenic Gram-Negative Cocci and Bacilli

Rickettsias, Chlamydias, Spirochetes, and Vibrios

Pathogenic Fungi

Pathogenic DNA Viruses

Pathogenic RNA Viruses

Applied and Environmental Microbiology

Filters