Deck 14: Parasitic and Fungal Infections

Question 1

Which of the following diseases is matched incorrectly with its treatment?

A)Trichomoniasis: melarsoprol
B)Toxoplasmosis: pyrimethamine
C)Amebiasis: metronidazole
D)Trypanosomiasis: pentamidine

Answer 1

Trichomoniasis: melarsoprol

Question 2

The American form of trypanosomiasis is called

A)Chagas' disease
B)Amebiasis
C)Sleeping sickness
D)Enterobiasis
E)Ascariasis

Answer 2

Chagas' disease

Question 3

Which of the following diseases is not caused by nematodes?

A)Ascariasis
B)Trichomoniasis
C)Hookworm
D)Enterobiasis

Answer 3

Trichomoniasis

Question 4

Infection with Trichomonas vaginalis would show which symptoms?

A)Pain, vaginal discharge, and dysuria
B)A chancre and swollen lymph nodes
C)Tissue cysts in skeletal muscle
D)Nausea, abdominal pain, and diarrhea
E)Fever accompanied by worms vomited up or passed in the stool

Question 5

Which of the following statements is true?

A)Trichomoniasis is treated with a 95% success rate with oral metronidazole
B)Trichomonas forms cysts that can survive outside the host
C)Trichomonas is invasive
D)Trichomonas uses cell surface molecules for attachment to host epithelium
E)Trichomoniasis is transmitted through the fecal-oral route

Question 6

Rearrange the following into the order of events following ingestion of Ascaris eggs.Which is the third event?

A)Invasion of intestinal epithelium
B)Pumped into the lung
C)Conversion to larval stage
D)Coughed into mouth
E)Liver invasion

Question 7

The classes of helminth that are parasitic in humans include all of the following except

A)Cestodes
B)Trophozoites
C)Nematodes
D)Trematodes

Question 8

All of the following are possessed by helminths except

A)An excretory system
B)A circulatory system
C)Anaerobic respiration
D)A primitive nervous system
E)Bilateral symmetry

Question 9

Ascaris lumbricoides infection would result in which symptoms?

A)Pain, vaginal discharge, and dysuria
B)A chancre and swollen lymph nodes
C)Tissue cysts in skeletal muscle
D)Nausea, abdominal pain, and diarrhea
E)Fever accompanied by worms vomited up or passed in the stool

Question 10

Rearrange the following into the order of events following ingestion of Ascaris eggs.Which is the second event?

A)Invasion of intestinal epithelium
B)Pumped into the lung
C)Conversion to larval stage
D)Coughed into mouth
E)Liver invasion

Question 11

Which of the following parasites does not use more than one host to complete its life cycle?

A)Plasmodium falciparum
B)Trichomonas vaginalis
C)Taenia saginata
D)Trypanosoma cruzii

Question 12

All of the following are possible symptoms of malaria except

A)Hypotension
B)Hemoglobinuria
C)Fever
D)Thrombocytopenia
E)Elevated red blood cell level

Question 13

Which of the following symptoms would indicate infection with Trichinella spiralis?

A)Pain, vaginal discharge, and dysuria
B)A chancre and swollen lymph nodes
C)Tissue cysts in skeletal muscle
D)Nausea, abdominal pain, and diarrhea
E)Fever accompanied by worms vomited up or passed in the stool

Question 14

All of the following are matched correctly except

A)Malaria: mosquito transmission
B)Amebiasis: fecal-oral transmission
C)Trichomoniasis: sexual transmission
D)Toxoplasmosis: feline transmission
E)Trypanosomiasis: fecal-oral transmission

Question 15

Trypanosoma brucii can cause which symptoms?

A)Pain, vaginal discharge, and dysuria
B)A chancre and swollen lymph nodes
C)Tissue cysts in skeletal muscle
D)Nausea, abdominal pain, and diarrhea
E)Fever accompanied by worms vomited up or passed in the stool

Question 16

Which of the following is not an organelle used for locomotion by protozoans?

A)Endoplasm
B)Cilia
C)Pseudopods
D)Flagella

Question 17

One of the differences between protozoans and helminths is that protozoans are _____,whereas helminths are _____.

A)Free-living; parasitic
B)Unicellular; multicellular
C)Free-living; obligate intracellular pathogens
D)Segmented; flagellated

Question 18

Which of the following is not associated with cerebral malaria?

A)Convulsions
B)Low mortality
C)Paralysis
D)Plasmodium falciparum
E)Acute jaundice

Question 19

Which of the following symptoms are common in an infection with Toxoplasma gondii?

A)Pain, vaginal discharge, and dysuria
B)A chancre and swollen lymph nodes
C)Tissue cysts in skeletal muscle
D)Nausea, abdominal pain, and diarrhea
E)Fever accompanied by worms vomited up or passed in the stool

Question 20

Rearrange the following into the order of events following ingestion of Ascaris eggs.Which is the first event?

A)Invasion of intestinal epithelium
B)Pumped into the lung
C)Conversion to larval stage
D)Coughed into mouth
E)Liver invasion

Question 21

Fungi that can grow in either the yeast or mold form depending on environmental conditions exhibit

A)Virulence
B)Dimorphism
C)Opportunism
D)Superficial mycoses
E)Hyperkeratosis

Question 22

Which of the following is a correctly matched pair?

A)Superficial mycoses: tissue response
B)Tinea capitis: between toes
C)Onychomycosis: mucous membranes
D)Keratitis: colonization of corneal epithelium
E)Systemic mycoses: folliculitis

Question 23

Answer true or false to the following statement: Chitin is composed of polymers of N-acetylmuramic acid.

Question 24

Rearrange the following into the order of events following ingestion of Ascaris eggs.Which is the fifth event?

A)Invasion of intestinal epithelium
B)Pumped into the lung
C)Conversion to larval stage
D)Coughed into mouth
E)Liver invasion

Question 25

Answer true or false to the following statement: Fungi are classified according to the characteristics of their sexual spores and hyphal septation.

Question 26

Describe the lifecycle of Plasmodium falciparum beginning with the ingestion of human blood by the Anopheles mosquito.

Question 27

Unicellular fungi are referred to as

A)Conidia
B)Molds
C)Dimorphic
D)Yeasts
E)Opportunistic

Question 28

Answer true or false to the following statement: There are no examples of anaerobic fungi.

Question 29

All of the following are examples of diseases caused by trematodes except

A)Enterobiasis
B)Clonorchiasis
C)Schistosomiasis
D)Paragonimiasis

Question 30

Rearrange the following into the order of events following ingestion of Ascaris eggs.Which is the fourth event?

A)Invasion of intestinal epithelium
B)Pumped into the lung
C)Conversion to larval stage
D)Coughed into mouth
E)Liver invasion

Question 31

Cestodes are associated with all of the following characteristics except

A)Possession of a head called the scolex
B)Use of a retractable rostellum for attachment
C)Hermaphroditic nature
D)Absorption of nutrients across cuticle
E)Known as roundworms

Question 32

Answer true or false to the following statement: In contrast with bacteria,fungi incorporate ergosterol into their plasma membranes.

Question 33

Answer true or false to the following statement: Hyphae form in yeast by budding.

Question 34

What type of host immune response is needed to eliminate trypomastigotes from the blood? Why is this often not sufficient for complete eradication of the pathogen?

Question 35

Answer true or false to the following statement: Medically important fungi can be distinguished by transfer RNA analysis.

Question 36

Answer true or false to the following statement: The study of fungi is called parasitology.

Question 37

All of the following are examples of deep mycoses except

A)Histoplasmosis
B)Coccidiomycosis
C)Pityriasis
D)Aspergillosis

Question 38

Answer true or false to the following statement: Glucan provides structural stability for fungal cell walls.

Question 39

What can reach a length exceeding 10 meters while inhabiting the human jejunum?

A)Taenia saginata
B)Clonorchis sinensis
C)Schistosoma species
D)Paragonimus species

Question 40

Schistosomiasis is often treated with _____ to limit severe infections.

A)Penicillin
B)Corticosteroids
C)Metronidazole
D)Sulfonamides
E)Arsenic-containing compounds

Question 41

Explain how genetic recombination occurs in fungi.

Question 42

What special considerations must be taken into account when treating trypanosomiasis if the central nervous system (CNS)is involved? Which drug would be most effective if this were the case,and why?

Question 43

Identify and describe three categories of pathogenic fungal infection.