Question 1

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

Accepted Answer

A) True 
 B)False

Question 2

Which form of Leishmania lacks flagella and multiplies in a mammalian host's macrophages?

Accepted Answer

A)  epimastigotes 
B)  promastigotes 
C)  trophozoites 
D)  cystic forms 
E)  amastigotes 
A)  epimastigotes 
B)  promastigotes 
C)  trophozoites 
D)  cystic forms 
E)  amastigotes

Question 3

What is a prophylactic drug of choice for malaria?

Accepted Answer

A)  nifurtimox 
B)  artemisinin 
C)  tetracycline 
D)  pyrimethamine 
E)  proguanil 
A)  nifurtimox 
B)  artemisinin 
C)  tetracycline 
D)  pyrimethamine 
E)  proguanil

Question 4

After a trip to several South American countries, a middle- aged man becomes ill. He becomes anemic, loses weight, and runs a fever. The clinician notes a recently healed sore near his nose. Microscopic examination of a blood smear does not reveal anything other than the anemia. What parasitic infection is consistent with this scenario?

Accepted Answer

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

Question 5

The vectors of are sand flies.

Accepted Answer

A)  leishmaniasis 
B)  Chagas' disease 
C)  beaver fever 
D)  filariasis 
E)  giardiasis 
A)  leishmaniasis 
B)  Chagas' disease 
C)  beaver fever 
D)  filariasis 
E)  giardiasis

Question 6

Humans become infected with Fasciola by

Accepted Answer

A)  consuming cysticerci in contaminated meat. 
B)  the penetration of cercariae through the skin. 
C)  ingesting the encysted metacercariae on watercress or other vegetation. 
D)  the bite of infected mosquitoes. 
E)  ingesting water contaminated with eggs shed in infected dog's urine. 
A)  consuming cysticerci in contaminated meat. 
B)  the penetration of cercariae through the skin. 
C)  ingesting the encysted metacercariae on watercress or other vegetation. 
D)  the bite of infected mosquitoes. 
E)  ingesting water contaminated with eggs shed in infected dog's urine.

Question 7

Plasmodium reproduces by binary fission.

Accepted Answer

A) True 
 B)False

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

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

Accepted Answer

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

Question 10

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

Accepted Answer

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

Question 11

Schistosoma

Accepted Answer

A)  is a roundworm. 
B)  uses snails as an intermediate host. 
C)  is a liver fluke. 
D)  has proglottids. 
E)  is a cestode. 
A)  is a roundworm. 
B)  uses snails as an intermediate host. 
C)  is a liver fluke. 
D)  has proglottids. 
E)  is a cestode.

Question 12

The easiest way to prevent Taenia infection in humans is to

Accepted Answer

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

Question 13

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 14

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

Accepted Answer

A)  Snails are the intermediate host. 
B)  Infection is contracted by contact with fresh water where the snail intermediate hosts occur. 
C)  They are contracted by eating snails. 
D)  The worms look like snails. 
E)  Physical contact with snails may result in infection. 
A)  Snails are the intermediate host. 
B)  Infection is contracted by contact with fresh water where the snail intermediate hosts occur. 
C)  They are contracted by eating snails. 
D)  The worms look like snails. 
E)  Physical contact with snails may result in infection.

Question 15

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...

Question 16

The only helminth disease of humans spread by an insect vector is

Accepted Answer

A)  hydatid disease. 
B)  filariasis. 
C)  ascariasis. 
D)  schistosomiasis. 
E)  fascioliasis. 
A)  hydatid disease. 
B)  filariasis. 
C)  ascariasis. 
D)  schistosomiasis. 
E)  fascioliasis.

Question 17

The infectious stage of a beef tapeworm for humans is the

Accepted Answer

A)  gravid proglottids in feces. 
B)  eggs in contaminated water. 
C)  cysticerci in beef. 
D)  larvae in feces. 
E)  mature worm. 
A)  gravid proglottids in feces. 
B)  eggs in contaminated water. 
C)  cysticerci in beef. 
D)  larvae in feces. 
E)  mature worm.

Question 18

The tapeworm's (proglottids/scolex/strobila) reflects a sequence of development.

Accepted Answer

The answer of The tapeworm's (proglottids/scolex/strobila) reflects a sequence of...

Question 19

Because beavers are a common zoonotic source of infection with (Balantidium/Entamoeba/Giardia), the resulting condition is sometimes referred to as "beaver fever."

Accepted Answer

The answer of Because beavers are a common zoonotic source...

Question 20

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...

Exam 23: Parasitic Protozoa, Helminths, and Arthropod Vectors

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

Which form of Leishmania lacks flagella and multiplies in a mammalian host's macrophages?

What is a prophylactic drug of choice for malaria?

The vectors of are sand flies.

Humans become infected with Fasciola by

Plasmodium reproduces by binary fission.

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

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

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

Schistosoma

The easiest way to prevent Taenia infection in humans is to

Which of the following species of Plasmodium causes cerebral malaria?

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

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.

The only helminth disease of humans spread by an insect vector is

The infectious stage of a beef tapeworm for humans is the

The tapeworm's (proglottids/scolex/strobila) reflects a sequence of development.

Because beavers are a common zoonotic source of infection with (Balantidium/Entamoeba/Giardia), the resulting condition is sometimes referred to as "beaver fever."

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

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 Disease, 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

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