Microbiology Chapter 23

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1

Explain the role of each of the following in dental caries (decay)

capsule-forming bacteria

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2

Explain the role of each of the following in dental caries (decay)

sucrose

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3

Explain the role of each of the following in dental caries (decay)

acid-forming bacteria

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4

What organism is associated with peptic ulcer?

When was this discovered?

How does this organism overcome the acidity of the stomach?

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5

S. aureus causes bacterial poisoning.

Why isn’t cooking foods at high temperature enough to prevent food poisoning?

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6

What is the most common cause of “Traveler’s Diarrhea”?

Explain why this one species of bacteria is both beneficial and harmful.

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7

What causes cholera? Where is it found? How does it enter the body?
How do cholera toxins lead to diarrhea?

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8

What is the cause of salmonellosis (viruses, fungi, etc.)?
Differentiate salmonellosis from typhoid fever, and the cause of each

Explain the events of salmonellosis.

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9

What are the most common foods that contain salmonella? What is the best way to prevent infection? (Be specific)

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10

Distinguish among the three primary forms of viral hepatitis, the agents that cause them, and ways to prevent infection for each.

Which one(s) do we have a vaccine for?

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11

What is the cause of Giardiasis?
What category of organisms cause this disease (e.g., bacteria, virus, etc.)
Name two ways that hikers can make their water free of Giardia, if they have to take water from a stream to drink?

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12

Describe the common features of the life cycle of the tapeworm that infects humans. Make sure you explain the role of suckers, hooks and proglottid in these organisms.

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