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WorksheetsListeria Monocytogenes
Total questions: 14
Worksheet time: 7mins
Name
Class
Date
1.
What can Listeria NOT manifest as?
a)
Gastroenteritis or septicemia
b)
CHF (congestive heart failure)
c)
encephalitis, meningitis or pneumonia
d)
spontaneous abortion
2.
What would Listeria gram stain look like?
a)
purple and cocci
b)
pink and rod shaped
c)
purple and rod shaped
d)
pink and cocci
3.
What virulence factors allow Listeria to spread from cell to cell?
a)
Pore forming endotoxins.
b)
Phospholipases.
c)
Listeriolysin O.
d)
All of the above.
4.
During a catalase test, would Listeria be able to produce gas bubbles?
a)
No, it is catalase negative
b)
Yes, because it's catalase negative
c)
Yes, because it has cytochrome C
d)
yes, b/c it has catalase enzyme
5.
Which homolysis type does Listeria carry out?
a)
Left image in the picture (hint: it is a clear zone).
b)
Middle image in the picture (hint: it is a greenish zone).
c)
The far right image in the picture (no color change).
d)
None of these.
6.
What types of cells does Listeria infect?
a)
dendritic cells
b)
endothelial cells
c)
Macrophages
d)
2 of the above
7.
Which of the following is not a reservoir for Listeria?
a)
Water.
b)
Soil.
c)
Vegetation.
d)
The Boulder reservoir
8.
How is Listeria most often transmitted?
a)
contaminated food
b)
feces
c)
eating soil
d)
feeding birds
9.
Regarding pathogenesis, how does Listeria NOT wreak havoc after cytosolic infection?
a)
It is taken up by M cells.
b)
It induces polymerization of host actin.
c)
It infects lung cells.
d)
It can multiply in hepatocytes.
10.
What can often happen to an unborn fetus if the mother is infected with Listeria?
a)
Mental retardation.
b)
Newborn sepsis.
c)
Cleft palate.
d)
Blindness.
11.
How is Listeria NOT diagnosed?
a)
Blood sample.
b)
Spinal fluid sample.
c)
Placental tissue.
d)
Epidermal tissue sample.
12.
How does the antibiotic, Ampicillin, kill Listeria?
a)
It inhibits DNA Gyrase.
b)
It inhibits folic acid synthesis.
c)
It prevents crosslinking of peptides that hold peptidoglycan networks together.
d)
Two of these are correct.
13.
True or false: there is a vaccine available for Listeria.
a)
True.
b)
False.
14.
What is the best way to prevent listeriosis (IE prevent yourself from being infected with the bacteria)?
a)
Food safety.
b)
Antibiotics.
c)
Vaccines.
d)
Two of these.
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