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Clin Micro > Exam 2 Practice Questions > Flashcards

Exam 2 Practice Questions Flashcards

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1
Q

Yeasts can be described as _________________.

Select one:

a. multicelled eukaryotes
b. single celled eukaryotes
c. multicelled prokaryotes
d. single celled prokaryotes

A

b. single celled eukaryotes

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2
Q

A collection of hyphae is referred to as a/n ____________________.

Select one:

a. septate structure
b. mycelium
c. aseptate structure
d. thallus

A

b. mycelium

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3
Q

What is a mycoses?

A

A fungal disease

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4
Q

Which of the following fungi is responsible for Spelunker’s disease?

Select one:

a. Histoplasma capsulatum
b. Coccidioides imitis
c. Blastomyces dermatitis
d. Mucor sp.

A

a. Histoplasma capsulatum

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5
Q

Coccidioides immitis causes the disease known as _________________.

A

Valley Fever

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6
Q

Localized infection of the nasal passages that has the potential to spread to the bloodstream is characteristic of _____________.

A

Mucormycosis

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7
Q

What IV antifungal is used to treat systemic fungal infections? And how does it work?

A

amphotericin B

Binds to primary fungal cell membrane sterol called ergo sterol and causes the cell to lyse

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8
Q

Which of these occupations is most likely to put an individual at risk for contracting sporotrichosis?

Select one:

a. greenhouse technician
b. sewage treatment
c. butcher
d. veterinarian

A

a. greenhouse technician

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9
Q

Identify the appropriate location on the body for each tinea infection.

  1. tinea pedis
  2. tinea corporis
  3. tinea capitis
  4. tinea unguium
A
  1. tinea pedis - foot
  2. tinea corporis - body
  3. tinea capitis - head
  4. tinea unguium - nails
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10
Q

Which organism is mostly to be causative of tinea pedis?

Select one:

a. Trichophyton tonsurans
b. Staphylococcus aureus
c. Histoplasma capsulatum
d. Sporothrix schenckii

A

a. Trichophyton tonsurans

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11
Q

Which type of tinea infection is NOT contagious?

A

b. tinea versicolor

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12
Q

Ringworm is the common name for a _________________________.

A

superficial fungal infection

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13
Q

What is thrush?

A

an oral Candida albicans infection

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14
Q

Which of the following pathogens is often responsible for meningoencephalitis in AIDS patients?

Select one:

a. Candida albicans
b. Cryptococcus neoformans
c. Pneumocystis jiroveci
d. Staphylococcus pneumoniae

A

b. Cryptococcus neoformans

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15
Q

The host in which a parasite reproduces is known as the ________________ host.

A

Definitive

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16
Q

The host in which the parasite grows, but does not reproduce, is known as the ________________ host.

A

intermediate

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17
Q

Gastrointestinal parasites are most often diagnosed by using _________________.

A

fecal samples

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18
Q

What is the infective form of Entamoeba histolytica, that is the life stage that infects humans?

A

Cyst

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19
Q

Which organ is impacted in the most serious form of E. histolytica infection?

A

Liver

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20
Q

What is the most common way to acquire E. histolytica?

A

eating contaminated food

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21
Q

Unlike many other protozoan parasites the infective form of N. fowleri is the __________________.

A

Trophozoite

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22
Q

What results from N. fowleri infection?

A

meningoencephalitis

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23
Q

What is the route of transmission for Giardia lamblia?

A

Fecal-oral

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24
Q

Giardia lamblia typically causes bloody diarrhea. True or false

A

False

G. lamblia only prevents reabsorption. No bleeding occurs

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25
G. lamblia only prevents reabsorption. No bleeding occurs
sexual contact
26
True or false. The cyst form of Trichomonas vaginalis is responsible for the itching and green discharge seen in female patients.
False There is no cyst form present in T. vaginalis. The trophozoite form is passed between humans and causes the symptoms.
27
What is the vector for Trypanosoma brucei?
Tse-Tse fly
28
What symptoms would you anticipate in a patient suffering from a T. brucei infection?
mental confusion
29
What is the vector for Typanosoma cruzi?
kissing bug
30
What is a chagoma?
a red nodule at the site of the bite
31
Chronic Chagas' disease is most often damaging to the ______________.
heart
32
What is the vector for visceral leishmaniasis?
Sand fly
33
The name Jericho boil or Baghdad boil refer to: Select one: a. Cutaneous leishmaniasis b. Visceral leishmaniasis c. Mucocutaneous leishmaniasis d. Kala zaar
a. Cutaneous leishmaniasis
34
What is the most likely reservoir of B. coli for human infection?
Pigs
35
What is the most likely symptom to be observed in a patient with a B. coli infection?
Bloody diarrhea
36
What is the infective form of Plasmodium sp. parasites?
Sporozoite
37
What is the consequence of the production of hemozoin (malarial pigment) in the patient?
Anemia
38
What is the consequence of the production of hemozoin (malarial pigment) in the patient?
P. falciparium
39
The "signet ring" formation in red blood cells is characteristic of which species of malaria?
P. falciparium
40
What is the vector for Babesia microti?
Tick
41
Red blood cells infected with B. microti will display which of the following distinctive patterns? Select one: a. a signet ring b. a band c. a tetrad d. a rosette
c. a tetrad
42
What is the definitive host for Toxoplasma gondii?
Cat
43
Ingestion of the ______________ is the most common mode of infection in humans.
oocyst
44
Toxoplasmosis is most risky for which group of individuals?
neonates
45
What is the typical route of transmission for Cryptosporidium parvum?
ingestion of contaminated water
46
An important feature of C. parvum is it's ability to resist __________________.
chlorine
47
How is Ascaris lumbricoides contracted by the human host?
ingestion of ova
48
Where do A. lumbricoides larvae grow and molt in the human host?
the lung
49
What symptoms would be anticipated in a human host with a low worm burden?
no symptoms
50
What is the route of transmission of Trichuris trichiura?
fecal- oral
51
Where do the adult worms of T. trichiura live in the human host?
the large intestine
52
What is the consequence of a heavy worm burden of T. trichiura?
prolapsed rectum
53
Where are the adults of Ancylostoma duodenale found in the human host?
in the small intestine
54
Which of the following might allow a human to acquire a hookworm infection? Select one: a. walking barefoot b. being bitten by a mosquito c. drinking contaminated water d. having unprotected sex
a. walking barefoot
55
When the eggs produced by a female worm are hatched very soon after being released, the female is said to be ______________________.
ovoviviparous
56
Which nematode has the ability to persist as free-living adult worms?
Strongyloides stercoralis
57
Which of the following might put a human at risk of contracting Anisakis sp.? Select one: a. being bitten by a mosquito b. eating undercooked fish c. eating undercooked pork d. drinking contaminated water
b. eating undercooked fish
58
How is anisakisis treated?
physical removal via endoscopy
59
Eating undercooked pork puts an individual at risk for contracting _________________.
Trichinella spiralis
60
Where would you expect to find the larvae of Trichinella spiralis in the human host?
In muscle tissue
61
How does an individual become infected with Dracunculus medinensis?
by drinking water containing infected copepods
62
How is D. medinensis treated?
by mechanically extracting the worm
63
What is the vector for Wuchereia bancrofti?
Mosquito
64
When should blood be drawn to test for elephantiasis?
during the night
65
What is the vector of the parasite that causes river blindness?
the black fly
66
Where are the adults of Onchocerca volvulus found in the human host?
in subcutaneous tissue
67
What life stage of F. hepatica infects a human host?
cercariae
68
The most common reservoirs for F. hepatica are?
sheep
69
Which of the following lunch choices would put you at risk for F. hepatica? Select one: a. sushi b. a salad c. a cheeseburger d. fish sandwich
b. a salad
70
What is most likely food to harbor C. sinensis? Select one: a. sushi (raw fish) b. rare cheeseburger c. raw eggs d. a salad
sushi (raw fish)
71
What is the intermediate host for C. sinensis?
snail
72
Where in the human host would you expect to find the adults of Fasciolopsis buski?
small intestine
73
What is the intermediate host for F. buski?
snail
74
What is the usual host of F. buski?
pigs
75
Unlike other flukes, schistosomes: Select one: a. are of both sexes, male and female b. have a cyst form c. have a fish as an intermediate host d. do not lay eggs
a. are of both sexes, male and female
76
Where would you find adult schistosomes in a human host?
Veins
77
The larval cercariae of schistosomes enter the human via:
penetration of skin
78
A patient presents with eosinophila? What should you consider in your diagnosis?
helminthic (worm) infection
79
What would be the most likely source of a Taenia saginata infection?
a rare steak
80
Upon being treated for a tapeworm, a patient should be certain to pass the head of the worm in their feces. What is the name given to the head of a tapeworm?
scolex
81
What is the most likely source of a T. solium infection?
a rare pork chop
82
What is the name given to the fluid filled larval structures in Taenia infections?
cysticerci
83
Cystercerosis occurs only with the pork tapeworm. How is it most likely to present in a patient?
as meningitis
84
What is the most likely source of a Diphyllobothrium latum infections?
sushi
85
What is the intermediate host of D. latum?
a copepod
86
Long term infection with D. latum is characterized by weight loss and _____________.
vitamin B12 deficiency
87
Human infection with Echinococcus granulosus usually results from contact with an infected _________________.
dog
88
The name given to the fluid filled larval structures of an E. granulosus infection is_______________.
hydatid cyst

Clin Micro (9 decks)

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