Question 1

Which of the following is more likely to cause urinary tract infections?

Accepted Answer

A)   fimbriated strains of Escherichia coli
B)   non-fimbriated strains of Escherichia coli
C)   both fimbriated and non-fimbriated strains of Escherichia coli
D)   None of the answers are correct.E) C) and D)
F) B) and C)

Question 2

Malassezia spp.are the MOST common fungi present on the skin of humans.

Accepted Answer

A) True 
 B)False

Question 3

Why does Neisseria gonorrhea adhere only to mucosal epithelial cells in the genitourinary tract,eye,rectum,and throat?

Accepted Answer

N.gonorrhea has a surface prot...

Question 4

The toxic lipopolysaccharides produced by MOST gram-negative bacteria are called exotoxins.

Accepted Answer

A) True 
 B)False

Question 5

________ are microbial infections acquired by hospital patients with noninfectious diseases because they are compromised hosts.

Accepted Answer

A)   Healthcare-associated infections
B)   Immunocompromised infections
C)   Pathogenic infections
D)   Virulent infectionsE) A) and B)
F) A) and C)

Question 6

Why is fever the universal result of endotoxin exposure?

Accepted Answer

Endotoxins stimulate host cell...

Question 7

Which disease CANNOT be prevented via the use of a vaccine generated from an attenuated pathogen?

Accepted Answer

A)   malaria
B)   measles
C)   mumps
D)   rubellaE) None of the above
F) A) and D)

Question 8

Bacteria make up about one-third the weight of fecal matter.

Accepted Answer

A) True 
 B)False

Question 9

The spread of pathogens through the blood and lymph systems that results in a bloodborne systemic infection is called

Accepted Answer

A)   bacteremia.
B)   cancer.
C)   pathogenesis.
D)   septicemia.E) C) and D)
F) B) and D)

Question 10

The process by which microorganisms cause diseases is known as

Accepted Answer

A)   pathogenesis.
B)   virulence.
C)   LD₅₀ (lethal dose₅₀) .
D)   infection.E) All of the above
F) A) and C)

Question 11

The following bacterial species are all implicated in dental caries EXCEPT

Accepted Answer

A)   Fusobacterium.
B)   Borrelia.
C)   Streptococcus.
D)   Lactobacillus.E) B) and C)
F) A) and C)

Question 12

Normal microflora are usually found in the blood,lymph,and nervous systems of the body.

Accepted Answer

A) True 
 B)False

Question 13

How do dental lactic acid bacteria cause dental caries?

Accepted Answer

Lactic acid bacteria ferment sugars in t...

Question 14

Which of the following is NOT important for the adherence of bacteria to other bacteria as well as to host tissue?

Accepted Answer

A)   adherence polymers
B)   capsule
C)   glycocalyx
D)   slime layerE) C) and D)
F) B) and D)

Question 15

One microenvironment of the skin is an area where glands produce an oily substance called

Accepted Answer

A)   mucus.
B)   sebum.
C)   fimbrae.
D)   lipid A.E) B) and C)
F) C) and D)

Question 16

Which of these microorganisms is MOST likely to be found in the human gut?

Accepted Answer

A)   Helicobacter pylori
B)   Streptococcus sobrinus
C)   Streptococcus mutans
D)   Roseobacter denitrificansE) A) and B)
F) All of the above

Question 17

R plasmids help prevent the spread of virulence factors.

Accepted Answer

A) True 
 B)False

Question 18

Which of the following are NOT found in the gastrointestinal tract of healthy humans?

Accepted Answer

A)   Bacteroides
B)   Clostridium
C)   Escherichia coli
D)   protistsE) A) and D)
F) A) and C)

Question 19

The process by which white blood cells ingest and kill bacteria is called

Accepted Answer

A)   exocytosis.
B)   transcription.
C)   phagocytosis.
D)   translation.E) A) and C)
F) All of the above

Question 20

Which of the following is a way to prevent attenuation and maintain virulence in a bacterium?

Accepted Answer

A)   laboratory subculture
B)   animal passage
C)   polymerase chain reaction (PCR) 
D)   antibiotic therapyE) B) and C)
F) B) and D)

Exam 23: Microbial Interactions With Humans

R plasmids help prevent the spread of virulence factors.

Correct AnswerverifiedShow Answer

The process by which white blood cells ingest and kill bacteria is called

Correct AnswerverifiedShow Answer

________ are microbial infections acquired by hospital patients with noninfectious diseases because they are compromised hosts.

Correct AnswerverifiedShow Answer

One microenvironment of the skin is an area where glands produce an oily substance called

Correct AnswerverifiedShow Answer

The process by which microorganisms cause diseases is known as

Correct AnswerverifiedShow Answer

Which of these microorganisms is MOST likely to be found in the human gut?

Correct AnswerverifiedShow Answer

The spread of pathogens through the blood and lymph systems that results in a bloodborne systemic infection is called

Correct AnswerverifiedShow Answer

The following bacterial species are all implicated in dental caries EXCEPT

Correct AnswerverifiedShow Answer

Which of the following is a way to prevent attenuation and maintain virulence in a bacterium?

Correct AnswerverifiedShow Answer

The toxic lipopolysaccharides produced by MOST gram-negative bacteria are called exotoxins.

Correct AnswerverifiedShow Answer

Bacteria make up about one-third the weight of fecal matter.

Correct AnswerverifiedShow Answer

Which of the following are NOT found in the gastrointestinal tract of healthy humans?

Correct AnswerverifiedShow Answer

Malassezia spp.are the MOST common fungi present on the skin of humans.

Correct AnswerverifiedShow Answer

Why does Neisseria gonorrhea adhere only to mucosal epithelial cells in the genitourinary tract,eye,rectum,and throat?

Correct AnswerverifiedN.gonorrhea has a surface prot...View AnswerShow Answer

Which disease CANNOT be prevented via the use of a vaccine generated from an attenuated pathogen?

Correct AnswerverifiedShow Answer

Which of the following is more likely to cause urinary tract infections?

Correct AnswerverifiedShow Answer

Which of the following is NOT important for the adherence of bacteria to other bacteria as well as to host tissue?

Correct AnswerverifiedShow Answer

Why is fever the universal result of endotoxin exposure?

Correct AnswerverifiedEndotoxins stimulate host cell...View AnswerShow Answer

How do dental lactic acid bacteria cause dental caries?

Correct AnswerverifiedLactic acid bacteria ferment sugars in t...View AnswerShow Answer

Normal microflora are usually found in the blood,lymph,and nervous systems of the body.

Correct AnswerverifiedShow Answer

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N.gonorrhea has a surface prot...
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Endotoxins stimulate host cell...
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Lactic acid bacteria ferment sugars in t...
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Correct Answer
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